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Polyvinylpyrrolidone‐Coordinated Single‐Site Platinum Catalyst Exhibits High Activity for Hydrogen Evolution Reaction
Author(s) -
Li Can,
Chen Zheng,
Yi Hong,
Cao Yi,
Du Lei,
Hu Yidong,
Kong Fanpeng,
Kramer Campen Richard,
Gao Yunzhi,
Du Chunyu,
Yin Geping,
Zhang Igor Ying,
Tong Yujin
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202005282
Subject(s) - polyvinylpyrrolidone , catalysis , platinum , hydrogen , adsorption , density functional theory , atom (system on chip) , materials science , molecule , chemical engineering , combinatorial chemistry , chemistry , photochemistry , computational chemistry , polymer chemistry , organic chemistry , computer science , engineering , embedded system
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.