摘要
The hydroxide-exchange membrane fuel cell (HEMFC) is a promising energy conversion device. However, the development of HEMFC is hampered by the lack of platinum-group-metal-free (PGM-free) electrocatalysts for the hydrogen oxidation reaction (HOR). Now, a Ni catalyst is reported that exhibits the highest mass activity in HOR for a PGM-free catalyst as well as excellent activity in the hydrogen evolution reaction (HER). This catalyst, Ni-H2-2 %, was optimized through pyrolysis of a Ni-containing metal-organic framework precursor under a mixed N2/H2 atmosphere, which yielded carbon-supported Ni nanoparticles with different levels of strains. The Ni-H2-2 % catalyst has an optimal level of strain, which leads to an optimal hydrogen binding energy and a high number of active sites.
源语言 | 英语 |
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页(从-至) | 10797-10801 |
页数 | 5 |
期刊 | Angewandte Chemie - International Edition |
卷 | 59 |
期 | 27 |
DOI | |
出版状态 | 已出版 - 26 6月 2020 |
已对外发布 | 是 |