Bimetallic nanoalloys planted on super-hydrophilic carbon nanocages featuring tip-intensified hydrogen evolution electrocatalysis

Linjie Zhang, Haihui Hu, Chen Sun, Dongdong Xiao, Hsiao-Tsu Wang, Yi Xiao, Shuwen Zhao, Kuan Hung Chen, Wei-Xuan Lin, Yu-Cheng Shao, Xiuyun Wang, Chih-Wen Pao and Lili Han ()
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Linjie Zhang: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
Haihui Hu: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
Chen Sun: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
Dongdong Xiao: Institute of Physics, Chinese Academy of Sciences
Hsiao-Tsu Wang: Tamkang University
Yi Xiao: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
Shuwen Zhao: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
Kuan Hung Chen: Tamkang University
Wei-Xuan Lin: Tamkang University
Yu-Cheng Shao: National Synchrotron Radiation Research Center
Xiuyun Wang: Fuzhou University
Chih-Wen Pao: National Synchrotron Radiation Research Center
Lili Han: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract The insufficient availability and activity of interfacial water remain a major challenge for alkaline hydrogen evolution reaction (HER). Here, we propose an “on-site disruption and near-site compensation” strategy to reform the interfacial water hydrogen bonding network via deliberate cation penetration and catalyst support engineering. This concept is validated using tip-like bimetallic RuNi nanoalloys planted on super-hydrophilic and high-curvature carbon nanocages (RuNi/NC). Theoretical simulations suggest that tip-induced localized concentration of hydrated K+ facilitates optimization of interfacial water dynamics and intermediate adsorption. In situ synchrotron X-ray spectroscopy endorses an H* spillover-bridged Volmer‒Tafel mechanism synergistically relayed between Ru and Ni. Consequently, RuNi/NC exhibits low overpotential of 12 mV and high durability of 1600 h at 10 mA cm‒2 for alkaline HER, and demonstrates high performance in both water electrolysis and chlor-alkali electrolysis. This strategy offers a microscopic perspective on catalyst design for manipulation of the local interfacial water structure toward enhanced HER kinetics.

Date: 2024
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DOI: 10.1038/s41467-024-51370-1

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