Atomically Dispersed Metal Catalysts for Oxygen Reduction
Atomically Dispersed Metal Catalysts for Oxygen Reduction
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DOI：
10.1021/acsenergylett.9b00804
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发表时间：
2019-07-01
影响因子：
22
通讯作者：
Wu, Gang
中科院分区：
文献类型：
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作者：
Chen, Mengjie;He, Yanghua;Wu, Gang
原子分散和氮配位金属（如Fe， Co或Mn）催化剂的氧还原反应（ORR）活性前所未有，使其成为质子交换膜燃料电池（pemfc）中取代铂族金属（PGM）催化剂的有希望的低成本候选材料。本展望主要关注这些高风险、高回报的无pgm催化剂在机理理解、创新合成概念和性能改进方面的新进展。从活性位点和ORR途径的理论和计算分析开始，我们简要概述了催化剂合成，表征和催化性能的最新进展，旨在阐明结构性质的相关性。我们还研究了实现具有足够活性和稳定性的原子分散金属催化剂的挑战和未来方向，以实现可行的PEMFC应用。
The unprecedented oxygen reduction reaction (ORR) activity of atomically dispersed and nitrogen coordinated metal site (e.g., Fe, Co, or Mn) catalysts makes them promising low-cost candidates to replace platinum group metal (PGM) catalysts in proton exchange membrane fuel cells (PEMFCs). This Perspective focuses on emerging developments in mechanistic understanding, innovative synthetic concept, and performance improvement of these high-risk, high-reward PGM-free catalysts. Starting from theoretical and computational analysis of active sites and ORR pathways, we provide a concise overview of recent progress in catalyst synthesis, characterization, and catalytic performance with an aim to elucidate structure property correlations. We also examine remaining challenges and future directions to realize atomically dispersed metal catalysts with sufficient activity and stability for viable PEMFC applications.