| Autor: |
Yana Men, Xiaozhi Su, Peng Li, Yue Tan, Chuangxin Ge, Shuangfeng Jia, Lei Li, Jianbo Wang, Gongzhen Cheng, Lin Zhuang, Shengli Chen, Wei Luo |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Journal of the American Chemical Society. 144(28) |
| ISSN: |
1520-5126 |
| Popis: |
Precisely tailoring the electronic structures of electrocatalysts to achieve an optimum hydroxide binding energy (OHBE) is vital to the alkaline hydrogen oxidation reaction (HOR). As a promising alternative to the Pt-group metals, considerable efforts have been devoted to exploring highly efficient Ni-based catalysts for alkaline HOR. However, their performances still lack practical competitiveness. Herein, based on insights from the molecular orbital theory and the Hammer-Nørskov d-band model, we propose an ingenious surface oxygen insertion strategy to precisely tailor the electronic structures of Ni electrocatalysts, simultaneously increasing the degree of energy-level alignment between the adsorbed hydroxide (*OH) states and surface Ni d-band and decreasing the degree of anti-bonding filling, which leads to an optimal OHBE. Through the pyrolysis procedure mediated by a metal-organic framework at a low temperature under a reducing atmosphere, the obtained oxygen-inserted two atomic-layer Ni shell-modified Ni metal core nanoparticle (Ni@O |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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