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Author:

Shu, Chengyong (Shu, Chengyong.) | Gan, Zhuofan (Gan, Zhuofan.) | Hou, Yuyang (Hou, Yuyang.) | Zhu, Ting (Zhu, Ting.) | Ma, Jijun (Ma, Jijun.) | Tang, Wei (Tang, Wei.) | Wu, Yuping (Wu, Yuping.)

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Abstract:

The search for a low-cost metal-free cathode material with excellent mass transfer structure and catalytic activity in oxygen reduction reaction (ORR) is one of the most challenging issues in fuel cells. In this work, nitrogen-rich m-phenylenediamine is introduced into the synthesis of porous carbon spheres to tune the pore structure and nitrogen-doped active sites. As a result, more pyridinic N and pyrrolic N functional species were observed at the interior and surface of the carbon spheres. The introduction of m-phenylenediamine also regulated the nucleating of precursors, an urchin-like mesoporous surface structure ensures point contact and less agglomeration between each particle was obtained. With optimized proportion of micropores/mesopores and improved nitrogen-contained functional species, the ORR activity can be remarkably improved. The half-wave potential of this catalyst could achieve to 0.81 V (versus RHE) which is only 42 mV lower than commercial Pt/C catalyst. Furthermore, the optimized cathode catalyst achieved a 69 mW cm(-2) maximum power density when operated in direct methanol fuel cells at room temperature.

Keyword:

doped porous carbon free catalysts fuel cells metal&#8208 nitrogen&#8208 oxygen reduction reaction

Author Community:

  • [ 1 ] [Shu, Chengyong]Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China
  • [ 2 ] [Gan, Zhuofan]Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China
  • [ 3 ] [Tang, Wei]Xi An Jiao Tong Univ, Sch Chem Engn & Technol, Xian 710049, Peoples R China
  • [ 4 ] [Hou, Yuyang]CSIRO Mineral Resources, Clayton, Vic 3168, Australia
  • [ 5 ] [Zhu, Ting]Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
  • [ 6 ] [Ma, Jijun]Shanghai Inst Space Power Sources, State Key Lab Space Power Sources Technol, Shanghai 200245, Peoples R China
  • [ 7 ] [Wu, Yuping]Nanjing Tech Univ, Sch Energy Sci & Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211800, Peoples R China
  • [ 8 ] [Wu, Yuping]Nanjing Tech Univ, Inst Adv Mat, Nanjing 211800, Peoples R China

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Source :

ENERGY & ENVIRONMENTAL MATERIALS

Year: 2021

Issue: 1

Volume: 4

Page: 81-87

1 5 . 1 2 2

JCR@2020

Cited Count:

WoS CC Cited Count: 6

SCOPUS Cited Count: 13

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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