Chinese Journal of Catalysis ›› 2023, Vol. 54: 229-237.DOI: 10.1016/S1872-2067(23)64532-2

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Cooperative alkaline hydrogen evolution via inducing local electric field and electron localization

Qiyou Wanga,b,1, Yujie Gonga,1, Yao Tanb, Xin Zib, Reza Abazaric, Hongmei Lib, Chao Caib, Kang Liub, Junwei Fub, Shanyong Chend, Tao Luob, Shiguo Zhange, Wenzhang Lid, Yifa Shenga, Jun Liua,*(), Min Liub,*()   

  1. aSchool of Electrical Engineering, University of South China, Hengyang 421001, Hunan, China
    bHunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physics, Central South University, Changsha 410083, Hunan, China
    cDepartment of Chemistry, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran
    dCollege of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China
    eCollege of Materials Science and Engineering, Hunan University, Changsha 410082, Hunan, China
  • Received:2023-08-17 Accepted:2023-10-10 Online:2023-11-18 Published:2023-11-15
  • Contact: *E-mail: 2021000103@usc.edu.cn (J. Liu), minliu@csu.edu.cn (M. Liu).
  • About author:1Contributed equally to this work.
  • Supported by:
    Hunan Provincial Natural Science Foundation of China(2023JJ30499);Guangdong Provincial Natural Science Foundation of China(2022A1515010198);Natural Science Foundation of China(22002189);Natural Science Foundation of China(52202125);Natural Science Foundation of China(22376222);Central South University Research Programme of Advanced Interdisciplinary Studies(2023QYJC012);Central South University Innovation-Driven Re-search Programme(2023CXQD042)

Abstract:

Alkaline hydrogen evolution reaction (HER) represents a promising means to store intermittent renewable energy into clean energy. Unfortunately, the sluggish H2O dissociation and difficult *H adsorption-desorption are prominent obstacles to the development of alkaline HER. Herein, we developed a cooperative strategy via nanoneedle inducing local electric field and atomic doping causing electron localization for alkaline HER based on the preparation of Cu doped CoS2 nanoneedles (Cu-CoS2 NNs). Finite element method simulations and density functional theorycalculations demonstrate the local electric field accelerates H2O dissociation and electron localization facilitates *H adsorption, respectively. In situ attenuated total reflection infrared spectroscopy and electro-response measurement experimentally reveal the superior ability to H2O dissociation and *H adsorption for Cu-CoS2 NNs. As a result, the Cu-CoS2 NNs exhibit an ultralow overpotential of 64 mV at -10 mA cm-2 and long-term stability over 100 h at -100 mA cm-2 during alkaline HER, which outperforms most electrocatalysts in recently published works.

Key words: Alkaline hydrogen evolution, Local electric field, Electron localization, Cu doping, CoS2 nanoneedles