J. Mater. Sci. Technol. ›› 2025, Vol. 215: 111-120.DOI: 10.1016/j.jmst.2024.07.025

• Research Article • Previous Articles     Next Articles

Modulating the synergy of Pt single atoms and quantum dots on NiFe LDH for efficient and robust hydrogen evolution

Yuewen Wua, Mingpeng Chena,*, Di Liub,*, Huachuan Suna, Tong Zhoua, Guohao Naa, Guoyang Qiua, Dequan Lia, Yun Chena, Jianhong Zhaoa, Yumin Zhanga, Jin Zhanga, Hui Panb, Feng Liuc, Hao Cuic, Qingju Liua,*   

  1. aYunnan Key Laboratory for Micro/Nano Materials & Technology, National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650091, China;
    bInstitute of Applied Physics and Materials Engineering (IAPME), University of Macau, Taipa 999078, Macao Special Administrative Region of China;
    cYunnan Precious Metals Laboratory Co., Ltd., Kunming 650106, China
  • Received:2024-04-27 Revised:2024-07-16 Accepted:2024-07-18 Published:2025-04-20 Online:2024-07-28
  • Contact: *E-mail addresses: mpchen@ynu.edu.cn (M. Chen), diliu@um.edu.mo (D. Liu), qjliu@ynu.edu.cn (Q. Liu)

Abstract: Hydrogen evolution reaction (HER) from water electrolysis is an ideal alternative solution to address the energy crisis and develop clean energy. However, the construction of an efficient electrocatalyst with multiple active sites that can ensure high metal utilization and promote reaction kinetics simultaneously still leaves a major challenge. Herein, we present a facile strategy to synthesize a HER catalyst comprising Pt single atoms (PtSA) anchored in Fe vacancies and Pt quantum dots (PtQD) on the surface of NiFe LDH. Benefitting from the hierarchical and ultrathin nanosheet arrays and strong electronic interaction between PtSA/PtQD and NiFe LDH matrix, the optimized sample (PtSA/QD-NiFeV9 LDH) exhibits outstanding HER performance in 1 M KOH with ultra-low overpotentials of 20 and 67 mV at 10 and 100 mA cm-2, respectively, outperforming the benchmark Pt/C electrocatalyst. In addition, the electrolyzer using PtSA/QD-NiFeV9 LDH as a cathode requires voltages of only 1.48 and 1.73 V to yield current densities of 10 and 1000 mA cm-2, respectively. The combination of in situ tests and density functional theory (DFT) calculations reveal that the synergy of PtSA and PtQD can optimize the kinetics of water dissociation and hydrogen desorption, thus the Volmer-Tafel pathway prevailing the HER process. This work provides a promising surface engineering strategy to develop catalysts for efficient and robust hydrogen evolution.

Key words: Hydrogen evolution reaction, PtSA/QD-NiFeV9 LDH nanostructure, Alkaline water electrolysis, Metal-support interaction, Synergistic effect