Copper phosphosulfides as a highly active and stable photocatalyst for hydrogen evolution reaction

Xiandi Zhang, Kyung Ah Min, Weiran Zheng, Jeemin Hwang, Byungchan Han, Lawrence Yoon Suk Lee

Research output: Contribution to journalArticle

Abstract

Transition-metal phosphosulfides (TMPSs) have recently shown outstanding electrocatalytic performances toward hydrogen evolution reaction (HER), superior to the sulfide and phosphide counterparts. However, there are only limited TMPSs available due to the synthetic challenge. Herein, we demonstrate a novel synthetic approach for copper phosphosulfide (CuPS) and the first application in photocatalytic HER. Based on the thermodynamic considerations of starting materials, two synthetic routes are designed to obtain two distinct crystal structures (CuS|P and Cu3P|S). Dramatically enhanced photocatalytic HER activities are achieved for both Cu3P|S (2,085 μmol g-1 h-1) and CuS|P (976 μmol g-1 h-1) without using co-catalysts. First-principles calculations unveil the underlying mechanism for the improved HER activity, in which the Gibbs free energy of hydrogen adsorption approaches close to 0 eV and the number of active sites considerably increases with the formation of CuPS structure. This work provides new insight and design principle on preparing TMPSs for high-performance energy conversion applications.

Original languageEnglish
Article number118927
JournalApplied Catalysis B: Environmental
Volume273
DOIs
Publication statusPublished - 2020 Sep 15

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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