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Trace Amount of Platinum Supported on Carbonized Biomorphic Wood for Efficient Electrochemical Hydrogen Evolution in Alkaline Condition SCIE Scopus
期刊论文 | 2018 , 3 (7) , 2140-2143 | CHEMISTRYSELECT
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Abstract :

Carbonized biomorphic wood (Bio-C), which features unique properties such as highly ordered microtexture, well-developed porous structure, and low charge transfer resistance, was prepared as a promising scaffold with trace amount of platinum (Pt) supported to efficiently electrocatalyze hydrogen evolution reaction (HER). Pt/Bio-C nanocomposites demonstrated superior HER activity with a current density reaching as high as similar to 58 mA cm(-2) at -0.2 V vs. reversible hydrogen electrode (RHE) in strongly alkaline condition.

Keyword :

carbonized biomorphic wood platinum hydrogen evolution reaction electrocatalysis

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GB/T 7714 Wang, Meng , Goenuellue, Yakup , Pyeon, Myeongwhun et al. Trace Amount of Platinum Supported on Carbonized Biomorphic Wood for Efficient Electrochemical Hydrogen Evolution in Alkaline Condition [J]. | CHEMISTRYSELECT , 2018 , 3 (7) : 2140-2143 .
MLA Wang, Meng et al. "Trace Amount of Platinum Supported on Carbonized Biomorphic Wood for Efficient Electrochemical Hydrogen Evolution in Alkaline Condition" . | CHEMISTRYSELECT 3 . 7 (2018) : 2140-2143 .
APA Wang, Meng , Goenuellue, Yakup , Pyeon, Myeongwhun , Diao, Zhidan , Czympiel, Lisa , Singh, Mrityunjay et al. Trace Amount of Platinum Supported on Carbonized Biomorphic Wood for Efficient Electrochemical Hydrogen Evolution in Alkaline Condition . | CHEMISTRYSELECT , 2018 , 3 (7) , 2140-2143 .
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Interfacial and Dimensional Effects of Pd Co-Catalyst for Efficient Photocatalytic Hydrogen Generation EI Scopus SCIE
期刊论文 | 2018 , 122 (44) , 25165-25173 | Journal of Physical Chemistry C
WoS CC Cited Count: 1
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Abstract :

© 2018 American Chemical Society. Metal nanocrystal is widely used as cocatalyst to facilitate semiconductor-based photocatalytic conversion from water to hydrogen. While incredible developments are achieved to design the primary semiconductor photocatalysts, a few efforts are devoted to revealing the effect of shape, size, and surface structure of a metal cocatalyst. Herein, taking Pd as a model cocatalyst, the roles of cocatalyst are systematically studied by combining it with a commercial TiO2 (P25) photocatalyst. The success relies on a seed-mediated-approach for the fine integration of Pd nanocubes or nanooctahedra on the P25 surface. Both theoretical and experimental results demonstrate the advantage of Pd nanocubes over nanooctahedra in boosting photoactivity of TiO2 nanocrystals. The superiority arises from the appropriate interfacial Schottky barrier between TiO2 and Pd nanocubes and proper atomic H adsorption free energy of the {100} facets for accelerating interfacial charge separation and surface redox reaction, respectively. The activity could be further improved by selective removal of surface ligands of the nanocube. This work not only gives an insight into the effects of geometrical characteristics, such as the surface structure of a metal cocatalyst, in finely tuning the photoactivity of TiO2-Pd composites but also provides an extendable strategy to investigate similar photocatalytic manners of other metal or even compound cocatalysts.

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GB/T 7714 Xue, Fei , Chen, Chen , Fu, Wenlong et al. Interfacial and Dimensional Effects of Pd Co-Catalyst for Efficient Photocatalytic Hydrogen Generation [J]. | Journal of Physical Chemistry C , 2018 , 122 (44) : 25165-25173 .
MLA Xue, Fei et al. "Interfacial and Dimensional Effects of Pd Co-Catalyst for Efficient Photocatalytic Hydrogen Generation" . | Journal of Physical Chemistry C 122 . 44 (2018) : 25165-25173 .
APA Xue, Fei , Chen, Chen , Fu, Wenlong , Liu, Maochang , Liu, Chang , Guo, Penghui et al. Interfacial and Dimensional Effects of Pd Co-Catalyst for Efficient Photocatalytic Hydrogen Generation . | Journal of Physical Chemistry C , 2018 , 122 (44) , 25165-25173 .
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Engineering the coordination geometry of metal-organic complex electrocatalysts for highly enhanced oxygen evolution reaction EI SCIE Scopus
期刊论文 | 2018 , 6 (3) , 805-810 | JOURNAL OF MATERIALS CHEMISTRY A
WoS CC Cited Count: 28 SCOPUS Cited Count: 24
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Abstract :

Designing highly efficient oxygen evolution reaction (OER) electrocatalysts is very important for various electrochemical devices. In this work, for the first time, we have successfully generated coordinatively unsaturated metal sites (CUMSs) in phytic acid-Co2+ (Phy-Co2+) based metal-organic complexes by engineering the coordination geometry with room-temperature plasma technology. The CUMSs can serve as active centers to catalyze the OER. The electron spin resonance and X-ray absorption spectra provide direct evidence that the coordination geometry is obviously modified with many CUMSs by the plasma treatment. The plasma treated Phy-Co2+ (P-Phy-Co2+) only requires an overpotential of 306 mV to reach 10 mA cm(-2) on glassy carbon electrodes. When we expand this strategy to a CoFe bimetallic system, it only needs an overpotential of 265 mV to achieve 10 mA cm(-2) with a small Tafel slope of 36.51 mV dec(-1). P-Phy-Co2+ is superior to the state-of-the-art. Our findings not only provide alternative excellent OER electrocatalysts, but also introduce a promising principle to design advanced electrocatalysts by creating more CUMSs.

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GB/T 7714 Yan, Dafeng , Dong, Chung-Li , Huang, Yu-Cheng et al. Engineering the coordination geometry of metal-organic complex electrocatalysts for highly enhanced oxygen evolution reaction [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2018 , 6 (3) : 805-810 .
MLA Yan, Dafeng et al. "Engineering the coordination geometry of metal-organic complex electrocatalysts for highly enhanced oxygen evolution reaction" . | JOURNAL OF MATERIALS CHEMISTRY A 6 . 3 (2018) : 805-810 .
APA Yan, Dafeng , Dong, Chung-Li , Huang, Yu-Cheng , Zou, Yuqin , Xie, Chao , Wang, Yanyong et al. Engineering the coordination geometry of metal-organic complex electrocatalysts for highly enhanced oxygen evolution reaction . | JOURNAL OF MATERIALS CHEMISTRY A , 2018 , 6 (3) , 805-810 .
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Triggering superior sodium ion adsorption on (200) facet of mesoporous WO3 nanosheet arrays for enhanced supercapacitance EI SCIE Scopus
期刊论文 | 2018 , 345 , 165-173 | CHEMICAL ENGINEERING JOURNAL
WoS CC Cited Count: 6 SCOPUS Cited Count: 6
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Abstract :

Tungsten trioxide (WO3) is believed to be a promising electrode candidate for supercapacitors, due to its reversible surface redox reaction resulted from the almost same W-O bond lengths with different oxidation states. However, the specific capacitance of WO3 electrode is very low (< 250 mF cm(-2)) because of its low conductivity and slow surface redox reaction kinetics. Herein, to address these issues, mesoporous WO3 nanosheets with exposed (200) facets were anchored on activated carbon cloth (ACC) via a simple two-step process including heat treatment and alcohol-thermal process. The ACC was coated on WO3 seeds and proceed a heat treatment at 500 degrees C and the time of alcohol-thermal process were 7 h, 8 h, and 9 h labeled as WO3@ACC-n (n = 7, 8, 9). SEM and TEM images confirmed the WO3 nanosheets were successful anchored on the ACC. The WO3@ACC-8 electrode showed the best specific areal capacitance which could reach as high as 659 mF cm(-2) at a current density of 5 mA cm(-2) and superior stability with almost no decrease in 10,000 cycles in the presence of Na2SO4 as the neutral electrolyte. The capacitance is encouragingly much higher than the previously reported values in a three-electrode system in the neutral aqueous condition. DFT calculations reveal that, in comparison to the (002) and (020) facets, the exposed (200) facets of the mesoporous WO3 nanosheets triggers the superior Na+-adsorption, which accelerates the Na+-involved surface redox reaction for the boosted supercapacitor performance. A flexible asymmetric supercapacitor (FASC) was fabricated from the WO3@ACC electrode, which exhibits high energy density (0.5 mWh cm(-3)) and power density (62 mW cm(-3)) without any attenuation during +/- 180 degrees wide-angle bending.

Keyword :

Exposed facet Sodium ion adsorption Flexible asymmetric supercapacitor Mesoporous WO3 nanosheets

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GB/T 7714 Yin, Zhuocheng , Bu, Yuyu , Ren, Jun et al. Triggering superior sodium ion adsorption on (200) facet of mesoporous WO3 nanosheet arrays for enhanced supercapacitance [J]. | CHEMICAL ENGINEERING JOURNAL , 2018 , 345 : 165-173 .
MLA Yin, Zhuocheng et al. "Triggering superior sodium ion adsorption on (200) facet of mesoporous WO3 nanosheet arrays for enhanced supercapacitance" . | CHEMICAL ENGINEERING JOURNAL 345 (2018) : 165-173 .
APA Yin, Zhuocheng , Bu, Yuyu , Ren, Jun , Chen, Shuai , Zhao, Daming , Zou, Yihui et al. Triggering superior sodium ion adsorption on (200) facet of mesoporous WO3 nanosheet arrays for enhanced supercapacitance . | CHEMICAL ENGINEERING JOURNAL , 2018 , 345 , 165-173 .
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A simple green approach to synthesis of sub-100 nm carbon spheres as template for TiO2 hollow nanospheres with enhanced photocatalytic activities EI SCIE Scopus CSCD
期刊论文 | 2018 , 61 (6) , 869-877 | SCIENCE CHINA-MATERIALS
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

Carbon spheres (CSs) have attracted great attention given their wide applications in bio-diagnostics, photonic band-gap crystals and drug delivery, etc. The morphology and size of CSs greatly affect their performances and applications. Herein, we report a green and catalyst-free hydrothermal carbonization (HTC) method to synthesize CSs with glucose as carbon precursor. The diameter of CSs can be tuned within a wide range from 450 to 40 nm by controlling the glucose concentration, reaction time and temperature. Using the obtained CSs as template, hollow TiO2 nanospheres (HTNSs) with controllable diameters are prepared via a sol-gel method. As photocatalysts for hydrogen generation, the photoactivity of the HTNSs shows strong dependence upon size, and is much higher than that of solid TiO2. With particle size decreasing, the photoactivity of the obtained HTNSs gradually increases. Without any co-catalyst, the highest photocatalytic hydrogen generation activity is obtained with HTNSs of 40 nm in diameter, which exceeds that of solid TiO2 and commercial P25 by 64 times and 3 times, respectively.

Keyword :

carbon nanospheres photocatalytic hydrogen production hydrothermal carbonization hollow titanium dioxide nanospheres

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GB/T 7714 Tan, Yubo , Liu, Maochang , Wei, Daixing et al. A simple green approach to synthesis of sub-100 nm carbon spheres as template for TiO2 hollow nanospheres with enhanced photocatalytic activities [J]. | SCIENCE CHINA-MATERIALS , 2018 , 61 (6) : 869-877 .
MLA Tan, Yubo et al. "A simple green approach to synthesis of sub-100 nm carbon spheres as template for TiO2 hollow nanospheres with enhanced photocatalytic activities" . | SCIENCE CHINA-MATERIALS 61 . 6 (2018) : 869-877 .
APA Tan, Yubo , Liu, Maochang , Wei, Daixing , Tang, Heming , Feng, Xinjian , Shen, Shaohua . A simple green approach to synthesis of sub-100 nm carbon spheres as template for TiO2 hollow nanospheres with enhanced photocatalytic activities . | SCIENCE CHINA-MATERIALS , 2018 , 61 (6) , 869-877 .
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Surface- and interface-engineered heterostructures for solar hydrogen generation EI SCIE Scopus
期刊论文 | 2018 , 51 (16) | JOURNAL OF PHYSICS D-APPLIED PHYSICS
WoS CC Cited Count: 4 SCOPUS Cited Count: 6
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Abstract :

Photoelectrochemical (PEC) water splitting based on semiconductor photoelectrodes provides a promising platform for reducing environmental pollution and solving the energy crisis by developing clean, sustainable and environmentally friendly hydrogen energy. In this context, metal oxides with their advantages including low cost, good chemical stability and environmental friendliness, have attracted extensive attention among the investigated candidates. However, the large bandgap, poor charge transfer ability and high charge recombination rate limit the PEC performance of metal oxides as photoelectrodes. To solve this limitation, many approaches toward enhanced PEC water splitting performance, which focus on surface and interface engineering, have been presented. In this topical review, we concentrate on the heterostructure design of some typical metal oxides with narrow bandgaps (e.g. Fe2O3, WO3, BiVO4 and Cu2O) as photoelectrodes. An overview of the surface- and interface-engineered heterostructures, including semiconductor heterojunctions, surface protection, surface passivation and cocatalyst decoration, will be given to introduce the recent advances in metal oxide heterostructures for PEC water splitting. This article aims to provide fundamental references and principles for designing metal oxide heterostructures with high activity and stability as photoelectrodes for PEC solar hydrogen generation.

Keyword :

surface and interface engineering solar hydrogen metal oxides photoelectrochemical water splitting heterostructures

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GB/T 7714 Chen, Xiangyan , Li, Yanrui , Shen, Shaohua . Surface- and interface-engineered heterostructures for solar hydrogen generation [J]. | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2018 , 51 (16) .
MLA Chen, Xiangyan et al. "Surface- and interface-engineered heterostructures for solar hydrogen generation" . | JOURNAL OF PHYSICS D-APPLIED PHYSICS 51 . 16 (2018) .
APA Chen, Xiangyan , Li, Yanrui , Shen, Shaohua . Surface- and interface-engineered heterostructures for solar hydrogen generation . | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2018 , 51 (16) .
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Nickel complex engineered interface energetics for efficient photoelectrochemical hydrogen evolution over p-Si EI SCIE Scopus
期刊论文 | 2018 , 220 , 362-366 | APPLIED CATALYSIS B-ENVIRONMENTAL
WoS CC Cited Count: 8 SCOPUS Cited Count: 9
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Here we report a p-Si photocathode decorated with nickel complex Ni(TEOA)(2)Cl-2 (Nil) in acidic aqueous solution (pH = 0.3) for photoelectrochemical (PEC) H-2 generation. Compared to bare p-Si, p-Si/Nil electrode exhibits significantly enhanced PEC performance, with higher cathodic photocurrent and exceptional lower onset potential. A relatively high photocurrent density of 5.57 mA/cm(2) was obtained at 0.0 V vs. reversible hydrogen electrode (RHE) under simulated 1 Sun illumination, which is even comparable to that of p-Si/Pt. Furthermore, the highly active p-Si/Nil electrode shows a remarkable stability over 24 h. The possible catalysis mechanism of Nil for p-Si in the PEC H-2 evolution process was also proposed in detail. The excellent PEC performance should be attributed to the Nil engineered p-Si/electrolyte interface energetics and the Nil catalyzed water reduction reaction, leading to robust hydrogen generation and excellent PEC stability. The present study made a deep insight into the engineered interface charge transfer and catalyst -driven surface water reduction processes at the semiconductor/electrolyte interface, which could provide some referable guidelines for fabricating highly efficient PEC system for solar 112 generation from the viewpoint of interface energetics engineering with metal complexes.

Keyword :

Semiconductor Nickel complex Interface energetics Water splitting

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GB/T 7714 Zhou, Wu , Niu, Fujun , Mao, Samuel S. et al. Nickel complex engineered interface energetics for efficient photoelectrochemical hydrogen evolution over p-Si [J]. | APPLIED CATALYSIS B-ENVIRONMENTAL , 2018 , 220 : 362-366 .
MLA Zhou, Wu et al. "Nickel complex engineered interface energetics for efficient photoelectrochemical hydrogen evolution over p-Si" . | APPLIED CATALYSIS B-ENVIRONMENTAL 220 (2018) : 362-366 .
APA Zhou, Wu , Niu, Fujun , Mao, Samuel S. , Shen, Shaohua . Nickel complex engineered interface energetics for efficient photoelectrochemical hydrogen evolution over p-Si . | APPLIED CATALYSIS B-ENVIRONMENTAL , 2018 , 220 , 362-366 .
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Phase-Modulated Band Alignment in CdS Nanorod/SnSx Nanosheet Hierarchical Heterojunctions toward Efficient Water Splitting EI SCIE Scopus
期刊论文 | 2018 , 28 (16) | ADVANCED FUNCTIONAL MATERIALS
WoS CC Cited Count: 19 SCOPUS Cited Count: 21
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CdS is a promising visible light response photoanode of photoelectrochemical (PEC) water splitting, but it remains a great challenge for practical application, due to the photohole-induced self-corrosion, and sulfide/sulfite ions as hole scavengers are always necessary for stable solar hydrogen generation. Herein, a CdS/SnSx nanorods/nanosheets hierarchical heterostructure with novel phase-engineered band alignment is rationally designed via a two-step solution reaction route for PEC water splitting. In the Na2SO4 aqueous electrolyte without any hole scavengers, compared with the pristine CdS, the CdS/SnSx photoanode achieves a remarkably enhanced photocurrent density of 1.59 mA cm(-2) and a considerable stability at bias potential 1.23 V versus reversible hydrogen electrode (RHE) under simulated sunlight. It is proposed that the deposited SnSx nanosheets not only act as protective layers to restrain the photocorrosion of CdS, but also facilitate the charge separation in CdS by the virtue of the Type II heterojunction formed between CdS and SnSx.

Keyword :

band alignment engineering heterojunctions photoelectrochemical water splitting tin sulfides cadmium sulfides

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GB/T 7714 Fu, Yanming , Cao, Fengren , Wu, Fangli et al. Phase-Modulated Band Alignment in CdS Nanorod/SnSx Nanosheet Hierarchical Heterojunctions toward Efficient Water Splitting [J]. | ADVANCED FUNCTIONAL MATERIALS , 2018 , 28 (16) .
MLA Fu, Yanming et al. "Phase-Modulated Band Alignment in CdS Nanorod/SnSx Nanosheet Hierarchical Heterojunctions toward Efficient Water Splitting" . | ADVANCED FUNCTIONAL MATERIALS 28 . 16 (2018) .
APA Fu, Yanming , Cao, Fengren , Wu, Fangli , Diao, Zhidan , Chen, Jie , Shen, Shaohua et al. Phase-Modulated Band Alignment in CdS Nanorod/SnSx Nanosheet Hierarchical Heterojunctions toward Efficient Water Splitting . | ADVANCED FUNCTIONAL MATERIALS , 2018 , 28 (16) .
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Steering plasmonic hot electrons to realize enhanced full-spectrum photocatalytic hydrogen evolution EI SCIE Scopus CSCD PKU
期刊论文 | 2018 , 39 (3) , 453-462 | CHINESE JOURNAL OF CATALYSIS
WoS CC Cited Count: 6 SCOPUS Cited Count: 6
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Abstract :

Integration of surface plasmons into photocatalysis is an intriguing approach to extend the light absorption range over the full solar spectrum. However, the low migration rates and uncertain diffusion directions of plasmonic hot electrons make their photocatalytic efficiency fail to meet expectations. It remains a challenging task to steer the migration of hot electrons and take full advantage of the plasmonic effect to achieve the desired high photocatalytic efficiency. Herein, we have developed an efficient strategy to steer the migration of plasmonic hot electrons through a well-designed hybrid structure that synergizes a "surface heterojunction" with a Schottky junction. The hybrid structure was synthesized by modifying titanium dioxide (TiO2) nanosheets (NSs) with gold (Au) nanoparticles (NPs) as a plasmonic metal and platinum (Pt) NPs as a co-catalyst. The "surface heterojunction" formed between two different crystal facets in the TiO2 NSs can induce the injection of plasmonic hot electrons from Au NPs excited by visible light to TiO2. Meanwhile, the Schottky junction formed between the Pt NPs and TiO2 NSs can force the migration of electrons from TiO2 to Pt NPs instead of flowing to Au NPs, attaining the efficient unidirectional transfer of carriers in the Au-TiO2 system. Plasmonic photocatalysts with this design achieved dramatically enhanced activity in full-spectrum photocatalytic hydrogen production. This work opens a new window to rationally design hybrid structures for full -spectrum photocatalysis. (C) 2018, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

Keyword :

Plasmonics Surface heterojunction Full spectrum Schottky junction Photocatalytic hydrogen production

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GB/T 7714 Li, Yanrui , Guo, Yu , Long, Ran et al. Steering plasmonic hot electrons to realize enhanced full-spectrum photocatalytic hydrogen evolution [J]. | CHINESE JOURNAL OF CATALYSIS , 2018 , 39 (3) : 453-462 .
MLA Li, Yanrui et al. "Steering plasmonic hot electrons to realize enhanced full-spectrum photocatalytic hydrogen evolution" . | CHINESE JOURNAL OF CATALYSIS 39 . 3 (2018) : 453-462 .
APA Li, Yanrui , Guo, Yu , Long, Ran , Liu, Dong , Zhao, Daming , Tan, Yubo et al. Steering plasmonic hot electrons to realize enhanced full-spectrum photocatalytic hydrogen evolution . | CHINESE JOURNAL OF CATALYSIS , 2018 , 39 (3) , 453-462 .
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Visible light-induced electronic structure modulation of Nb- and Ta-doped alpha-Fe2O3 nanorods for effective photoelectrochemical water splitting EI SCIE Scopus
期刊论文 | 2018 , 29 (6) | NANOTECHNOLOGY
WoS CC Cited Count: 2 SCOPUS Cited Count: 3
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The photoelectrochemical (PEC) water splitting activity of Nb and Ta-doped hematite (alpha-Fe2O3) nanorods was investigated with reference to electronic structures by in situ synchrotron x-ray absorption spectroscopy (XAS). Current density-potential measurements demonstrate that the PEC activity of alpha-Fe2O3 nanorods depends strongly on the species and concentrations of dopants. The doping of alpha-Fe2O3 nanorods with a low level of Nb or Ta can improve their electrical conductivity and thereby facilitate charge transport and reduced electron-hole recombination therein. The photoconversion effects of Nb and Ta-doped alpha-Fe2O3 by in situ XAS in the dark and under illumination revealed opposite evolutions of the spectral intensities of the Fe L-edge and Nb/Ta L-edge, indicating that charge transfer and a conduction pathway are involved in the photoconversion. Analytic in situ XAS results reveal that the alpha-Fe2O3 that is doped with a low level of Nb has a greater photoconversion efficiency than that doped with Ta because Nb sites are more active than Ta sites in alpha-Fe2O3. The correlation between PEC activity and the electronic structure of Nb/Ta-doped alpha-Fe2O3 is examined in detail using in situ XAS and helps to elucidate the mechanism of PEC water splitting in terms of the electronic structure.

Keyword :

x-ray absorption spectroscopy alpha-Fe2O3 photoelectrochemical water splitting electronic structure

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GB/T 7714 Chang, Han-Wei , Fu, Yanming , Lee, Wan-Yi et al. Visible light-induced electronic structure modulation of Nb- and Ta-doped alpha-Fe2O3 nanorods for effective photoelectrochemical water splitting [J]. | NANOTECHNOLOGY , 2018 , 29 (6) .
MLA Chang, Han-Wei et al. "Visible light-induced electronic structure modulation of Nb- and Ta-doped alpha-Fe2O3 nanorods for effective photoelectrochemical water splitting" . | NANOTECHNOLOGY 29 . 6 (2018) .
APA Chang, Han-Wei , Fu, Yanming , Lee, Wan-Yi , Lu, Ying-Rui , Huang, Yu-Cheng , Chen, Jeng-Lung et al. Visible light-induced electronic structure modulation of Nb- and Ta-doped alpha-Fe2O3 nanorods for effective photoelectrochemical water splitting . | NANOTECHNOLOGY , 2018 , 29 (6) .
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