Photoinduced loading of electron-rich Cu single atoms by moderate coordination for hydrogen evolution

Weiwei Fu; Jin Wan; Huijuan Zhang; Jian Li; Weigen Chen; Yuke Li; Zaiping Guo; Yu Wang

doi:10.1038/s41467-022-33275-z

Photoinduced loading of electron-rich Cu single atoms by moderate coordination for hydrogen evolution

Nat Commun. 2022 Sep 20;13(1):5496. doi: 10.1038/s41467-022-33275-z.

Authors

Weiwei Fu^#¹, Jin Wan^#¹, Huijuan Zhang^#¹, Jian Li², Weigen Chen², Yuke Li³, Zaiping Guo⁴, Yu Wang^{5

6}

Affiliations

¹ The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China.
² The school of Electrical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, China.
³ Department of Chemistry, Centre for Scientific Modeling and Computation, Chinese University of Hong Kong, Shatin, 999077, Hong Kong.
⁴ School of Chemical Engineering and Advanced Materials, University of Adelaide, Adelaide, 5005, Australia.
⁵ The School of Chemistry and Chemical Engineering, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, PR China. wangy@cqu.edu.cn.
⁶ The school of Electrical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, China. wangy@cqu.edu.cn.

^# Contributed equally.

Abstract

Single-atom catalysts offer maximal atom utilization efficiencies and high-electronegativity heteroatoms play a crucial role in coordinating reactive single metal atoms to prevent agglomeration. However, these strong coordination bonds withdraw electron density for coordinated metal atoms and consequently affect their catalytic activity. Herein we reveal the high loading (11.3 wt%) and stabilization of moderately coordinated Cu-P₃ structure on black phosphorus support by a photochemical strategy with auxiliary hydrogen. Single-atom Cu sites with an exceptional electron-rich feature show the [Formula: see text] close to zero to favor catalysis. Neighboring Cu atoms work in synergy to lower the energy of key water adsorption and dissociation intermediates. The reported catalyst shows a low overpotential of only 41 mV at 10 mA cm^-2 and Tafel slope of 53.4 mV dec^-1 for the alkaline hydrogen evolution reaction, surpassing both isolated Cu single atoms and Cu nanoclusters. The promising materials design strategy sheds light on the design and fabrication of high-loading single metal atoms and the role of neighboring single atoms for enhanced reaction kinetics.