Can Li, Zheng Chen, Hong Yi, Yi Cao, Lei Du, Yidong Hu, Fanpeng Kong, R Kramer Campen, Yunzhi Gao, Chunyu Du, Geping Yin, Igor Ying Zhang, and Yujin Tong:
Angew. Chem. Int. 59 (37), 150902-15907 (2020), pp. 6;
At the essence of developing Pt-based single atom catalyst (SAC) for hydrogen evolution reaction (HER) is to prepare well-defined and stable single Pt sites with desired electro-catalytic efficacy. Herein, we report a facile approach to generate uniformly dispersed Pt sites with outstanding HER performance via photochemical reduction method using polyvinylpyrrolidone (PVP) molecules as the key addictive to significantly simplify synthesis routes and enhance the catalytic performance. The as-prepared catalyst unfolds remarkable kinetic activities (20 times higher in 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 Pt atoms, which optimize the hydrogen adsorption energy, resulting in a considerably improved HER activity. Our findings push a step towards the industrial application of Pt-based SACs for the hydrogen economy.
The original publication is available by link DOI: 10.1002/anie.202005282