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Hierarchically porous carbons as supports for fuel cell electrocatalysts with atomically dispersed Fe-N x moieties.
Tong, Lei; Wang, Yu-Cheng; Chen, Ming-Xi; Chen, Zhi-Qing; Yan, Qiang-Qiang; Yang, Cheng-Long; Zhou, Zhi-You; Chu, Sheng-Qi; Feng, Xinliang; Liang, Hai-Wei.
Afiliação
  • Tong L; Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , University of Science and Technology of China , Hefei , 230026 , China . Email: hwliang@ustc.edu.cn.
  • Wang YC; State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China.
  • Chen MX; Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , University of Science and Technology of China , Hefei , 230026 , China . Email: hwliang@ustc.edu.cn.
  • Chen ZQ; Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , University of Science and Technology of China , Hefei , 230026 , China . Email: hwliang@ustc.edu.cn.
  • Yan QQ; Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , University of Science and Technology of China , Hefei , 230026 , China . Email: hwliang@ustc.edu.cn.
  • Yang CL; Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , University of Science and Technology of China , Hefei , 230026 , China . Email: hwliang@ustc.edu.cn.
  • Zhou ZY; State Key Laboratory of Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China.
  • Chu SQ; Institute of High Energy Physics , Chinese Academy of Sciences , Beijing 100049 , China.
  • Feng X; Faculty of Chemistry and Food Chemistry , Center for Advancing Electronics Dresden , Technische Universität Dresden , 01062 Dresden , Germany . Email: xinliang.feng@tu-dresden.de.
  • Liang HW; Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , University of Science and Technology of China , Hefei , 230026 , China . Email: hwliang@ustc.edu.cn.
Chem Sci ; 10(35): 8236-8240, 2019 Sep 21.
Article em En | MEDLINE | ID: mdl-31673323
ABSTRACT
The development of high-performance non-platinum group metal (non-PGM) catalysts for the oxygen reduction reaction (ORR) is still of significance in promoting the commercialization of proton exchange membrane fuel cells (PEMFCs). In this work, a "hierarchically porous carbon (HPC)-supporting" approach was developed to synthesize highly ORR active Fe-phenanthroline (Fe-phen) derived Fe-N x -C catalysts. Compared to commercial carbon black supports, utilizing HPCs as carbon supports can not only prevent the formation of inactive iron nanoparticles during pyrolysis but also optimize the porous morphology of the catalysts, which eventually increases the amount of reactant-accessible and atomically dispersed Fe-N x active sites. The prepared catalyst therefore exhibits a remarkable ORR activity in both half-cells (half-wave potential of 0.80 V in 0.5 M H2SO4) and H2-air PEMFCs (442 mA cm-2 at a working voltage of 0.6 V), making it among the best non-PGM catalysts for PEMFCs.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article