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Polyvinylpyrrolidone-Coordinated Single-Site Platinum Catalyst Exhibits High Activity for Hydrogen Evolution Reaction

MPS-Authors
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Li,  Can
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, Harbin Institute of Technology;
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Campen,  R. Kramer
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Faculty of Physics, University of Duisburg-EssenLotharstraße 1;

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Tong,  Yujin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Faculty of Physics, University of Duisburg-EssenLotharstraße 1;

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ange.202005282.pdf
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Citation

Li, C., Chen, Z., Yi, H., Cao, Y., Lei, D., Hu, Y., et al. (2020). Polyvinylpyrrolidone-Coordinated Single-Site Platinum Catalyst Exhibits High Activity for Hydrogen Evolution Reaction. Angewandte Chemie, 132(37), 16036-16041. doi:/10.1002/ange.202005282.


Cite as: http://hdl.handle.net/21.11116/0000-0006-B870-C
Abstract
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.