In Situ XAFS and HAXPES Analysis and Theoretical Study of Cobalt Polypyrrole Incorporated on Carbon (CoPPyC) Oxygen Reduction Reaction Catalysts for Anion-Exchange Membrane Fuel Cells
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- 作者：Koichiro Asazawa ; Hirofumi Kishi ; Hirohisa Tanaka ; Daiju Matsumura ; Kazuhisa Tamura ; Yasuo Nishihata ; Adhitya Gandaryus Saputro ; Hiroshi Nakanishi ; Hideaki Kasai ; Kateryna Artyushkova ; Plamen Atanassov
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：November 6, 2014
- 年：2014
- 卷：118
- 期：44
- 页码：25480-25486
- 全文大小：400K
- ISSN：1932-7455
文摘
Non-noble metal electrocatalysts not only are a solution to limited resources but also achieve higher efficiency for fuel cells, especially in alkaline media such as alkaline membrane fuel cells. Co-polypyrrole-based electrocatalysts provide high oxygen reduction reaction (ORR) reactivity, but the active sites and reaction mechanism have yet to be elucidated fully. In this study, ex situ and in situ synchrotron characterization and theoretical study have been combined to evaluate the ORR mechanism on two possible active sites consisting of Co coordinated with pyrrolic nitrogen and Co coordinated with pyridinic nitrogen.