期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 37, 页码 15902-15907出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202005282
关键词
electrocatalysis; electrochemistry; hydrogen evolution reaction; photochemistry; water splitting
资金
- Project of National Natural Science Foundation of China [21433003, 21973015]
- Foreign Short-term Visiting Program for Doctoral Students at HIT
The essence of developing a Pt-based single-atom catalyst (SAC) for hydrogen evolution reaction (HER) is the preparation of well-defined and stable single Pt sites with desired electrocatalytic efficacy. Herein, we report a facile approach to generate uniformly dispersed Pt sites with outstanding HER performance via a photochemical reduction method using polyvinylpyrrolidone (PVP) molecules as the key additive to significantly simplify the synthesis and enhance the catalytic performance. The as-prepared catalyst displays remarkable kinetic activities (20 times higher current density than the commercially available Pt/C) with excellent stability (76.3 % of its initial activity after 5000 cycles) for HER. EXAFS measurements and DFT calculations demonstrate a synergetic effect, where the PVP ligands and the support together modulate the electronic structure of the Pt atoms, which optimize the hydrogen adsorption energy, resulting in a considerably improved HER activity.
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