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Nano Research 2024, 17(4): 2499-2508 https://doi.org/10.1007/s12274-023-6185-x
Research Article | Issue | Published: 03 November 2023

Amorphous hybrid tungsten oxide–nickel hydroxide nanosheets used as a highly efficient electrocatalyst for hydrogen evolution reaction

Show Author's Information Chao Lyu,  Chenghai Dai,  Yiwei Tan( )
State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
Keywords:
hydrogen evolution reaction, ultrathin nanosheet, tungsten oxide, amorphous nanomaterial, bimetallic electrocatalyst
Topics:
Electrocatalysis
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Lyu C, Dai C, Tan Y. Amorphous hybrid tungsten oxide–nickel hydroxide nanosheets used as a highly efficient electrocatalyst for hydrogen evolution reaction. Nano Research, 2024, 17(4): 2499-2508. https://doi.org/10.1007/s12274-023-6185-x
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Abstract Full text Electronic supplementary material About this article

There are more challenges for alkaline hydrogen evolution reaction (HER) via simultaneously expediting the electron-coupled water dissociation process (Volmer step) and the following electrochemical H2 desorption (Heyrovsky step). Hybrid amorphous electrocatalysts are highly desirable for efficient hydrogen evolution from water-alkali electrolyzers due to the bifunctionality for the different elementary steps of HER and optimal interactions with water molecules and the reactive hydrogen intermediates (Had). Herein, the synthesis of amorphous hybrid ultrathin (tungsten oxide/nickel hydroxide) hydrate (a-[WO3/Ni(OH)2]·0.2H2O) nanosheets on nickel foam (NF) for efficient alkaline HER is described. The structural and composition features of a-[WO3/Ni(OH)2]·0.2H2O are characterized in detailed. The resulting a-[WO3/Ni(OH)2]·0.2H2O/NF electrocatalyst with the synergistic effect of both hybrid components for the HER elementary steps shows greatly improved the activity and durability for the HER with a low overpotential of −41 and −163 mV at −10 and −500 mA·cm−2, respectively, a Tafel slope as low as −72.9 mV·dec−1, and long-term stability of continuous electrolysis for at least 150 h accompanying by inappreciable overpotential change in 1 M KOH. In the hybrid a-[WO3/Ni(OH)2]·0.2H2O, Ni(OH)2 and WO3 moieties are separately responsible for accelerating dissociative adsorption of water and weakening Had adsorption strength, which is beneficial to the improvement of the alkaline HER activity.


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About this article

Amorphous hybrid tungsten oxide–nickel hydroxide nanosheets used as a highly efficient electrocatalyst for hydrogen evolution reaction

Show Author's information Chao Lyu, Chenghai Dai, Yiwei Tan( )
State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Chemical Engineering, Nanjing Tech University, Nanjing 211816, China

Abstract

There are more challenges for alkaline hydrogen evolution reaction (HER) via simultaneously expediting the electron-coupled water dissociation process (Volmer step) and the following electrochemical H2 desorption (Heyrovsky step). Hybrid amorphous electrocatalysts are highly desirable for efficient hydrogen evolution from water-alkali electrolyzers due to the bifunctionality for the different elementary steps of HER and optimal interactions with water molecules and the reactive hydrogen intermediates (Had). Herein, the synthesis of amorphous hybrid ultrathin (tungsten oxide/nickel hydroxide) hydrate (a-[WO3/Ni(OH)2]·0.2H2O) nanosheets on nickel foam (NF) for efficient alkaline HER is described. The structural and composition features of a-[WO3/Ni(OH)2]·0.2H2O are characterized in detailed. The resulting a-[WO3/Ni(OH)2]·0.2H2O/NF electrocatalyst with the synergistic effect of both hybrid components for the HER elementary steps shows greatly improved the activity and durability for the HER with a low overpotential of −41 and −163 mV at −10 and −500 mA·cm−2, respectively, a Tafel slope as low as −72.9 mV·dec−1, and long-term stability of continuous electrolysis for at least 150 h accompanying by inappreciable overpotential change in 1 M KOH. In the hybrid a-[WO3/Ni(OH)2]·0.2H2O, Ni(OH)2 and WO3 moieties are separately responsible for accelerating dissociative adsorption of water and weakening Had adsorption strength, which is beneficial to the improvement of the alkaline HER activity.

Keywords: hydrogen evolution reaction, ultrathin nanosheet, tungsten oxide, amorphous nanomaterial, bimetallic electrocatalyst

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Acknowledgements

Publication history

Received: 18 July 2023
Revised: 31 August 2023
Accepted: 11 September 2023
Published: 03 November 2023
Issue date: April 2024

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was financially supported by the Six Talent Peaks Project in Jiangsu Province (No. JNHB-043) and the Research Fund of State Key Laboratory of Materials-Oriented Chemical Engineering (No. ZK201713).

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