Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (6): 2008-2012.doi: 10.19799/j.cnki.2095-4239.2021.0393

• Special issue of hydrogen energy and fuel cell • Previous Articles     Next Articles

Activity origin of single/double-atom catalyst for hydrogen evolution reaction

Shishi ZHANG1(), Yanyang QIN1, Yaqiong SU1,2()   

  1. 1.School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
    2.Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven 5600MB, Netherlands
  • Received:2021-07-31 Revised:2021-08-31 Online:2021-11-05 Published:2021-11-03

Abstract:

Electrocatalytic hydrogen evolution reaction (HER) is a promising hydrogen energy conversion method. To develop high-performance and low-cost hydrogen evolution electrocatalysts, single- and double-atom catalysts (SACs, DACs) with transition metals (e.g., Fe, Ni, and Co) as the active center and nitrogen-doped graphene (N-graphene) as the substrate are selected for HER utilizing density functional theory calculations. The selected catalytic materials exhibit exceptional stability against sintering. We then chose H adsorption energy as the descriptor for analyzing the HER activity, and the results demonstrate that the CoN4 site exhibits excellent HER activity over other candidates. In contrast, NiN4 and Ni2N6 sites display inferior HER activity. In addition, the electronic structures of the catalysts are systematically discussed to uncover the origin of catalytic activity. This work reveals that DACs have poor HER activity compared to SACs and DACs, while the SACs (e.g., CoN4, FeN3, and FeN4) show low overpotential in HER. Therefore, the SACs can substitute commercial precious metals catalysts (Pt/C) for HER catalysts.

Key words: hydrogen evolution reaction, single-atom catalyst, electrocatalyst, density functional theory

CLC Number: