https://scholars.lib.ntu.edu.tw/handle/123456789/635008
標題: | Synergistic interactions between PtRu catalyst and nitrogen-doped carbon support boost hydrogen oxidation | 作者: | Ni, Weiyan Meibom, Josephine Lederballe Hassan, Noor Ul Chang, Miyeon Chu, You Chiuan Krammer, Anna Sun, Songlan Zheng, Yiwei Bai, Lichen Ma, Wenchao Lee, Seunghwa Jin, Seongmin Luterbacher, Jeremy S. Schüler, Andreas HAO MING CHEN Mustain, William E. Hu, Xile |
公開日期: | 1-一月-2023 | 來源出版物: | Nature Catalysis | 摘要: | Hydroxide exchange membrane fuel cell (HEMFC) is a potentially cost-effective energy conversion technology. However, current state-of-the-art HEMFCs require a high loading of platinum-group-metal (PGM) catalysts, especially for the hydrogen oxidation reaction. Here we develop a porous nitrogen-doped carbon-suppported PtRu hydrogen oxidation reaction catalyst (PtRu/pN-C) that has a high intrinsic and mass activity in alkaline condition. Spectroscopic and microscopic data indicate the presence of Pt single atoms in addition to PtRu nanoparticles on pN-C. Mechanistic study suggests Ru modulates the electronic structure of Pt for an optimized hydrogen binding energy, while Pt single atoms on pN-C optimize the interfacial water structure. These synergetic interactions are responsible for the high catalytic activity of this catalyst. An HEMFC with a low loading of this catalyst and a commercial Fe–N–C oxygen reduction reaction catalyst achieves a high PGM utilization rate. The current density at 0.65 V of this HEMFC reaches 1.5 A cm−2, exceeding the US Department of Energy 2022 target (1 A cm−2) by 50%. [Figure not available: see fulltext.] |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/635008 | ISSN: | 2520-1158 | DOI: | 10.1038/s41929-023-01007-1 |
顯示於: | 化學系 |
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