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V-doped Ni3N/Ni heterostructure with engineered interfaces as a bifunctional hydrogen electrocatalyst in alkaline solution: Simultaneously improving water dissociation and hydrogen adsorption

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An Erratum to this article was published on 19 May 2022

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Abstract

Alkali-water electrolyzers and hydroxide exchange membrane fuel cells are emerging as promising technologies to realize hydrogen economy. Developing cost-effective electrode materials with high activities towards corresponding hydrogen evolution (HER) and oxidation (HOR) reactions plays a crucial role in commercial hydrogen production and utilization. Herein, we fabricated a V-doped Ni3N/Ni heterostructure (V-Ni3N/Ni) through a controlled nitridation treatment on a V-incorporated nickel hydroxide precursor. The resultant catalyst exhibits comparable catalytic activity and durability to commercial Pt/C in terms of both HER (a low overpotential of 44 mV at the current density of 10 mA·cm−2) and HOR (a high current density of 1.54 mA·cm−2 at 0.1 V versus reversible hydrogen electrode) under alkaline conditions. The superior activity of V-Ni3N/Ni grown on different substrates further implies its intrinsic performance. Density functional theory (DFT) calculations reveal that the coupled metallic Ni and doped V can promote the water adsorption, accelerate the Volmer step of alkaline HER, as well as optimize the adsorption and desorption of hydrogen intermediate (H*) to reach a balanced ΔGH* value.

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Acknowledgements

This work was supported by the National Key R&D Program of China (No. 2017YFA0700104), the National Natural Science Foundation of China (NSFC, Nos. 21701124 and 21911530255), Tianjin Municipal Science and Technology Commission (Nos. 18TCQNJC71500 and 17JCZDJC38000) and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (2019-6).

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  1. Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China

    Huan Zhang, Juan Wang, Fengqi Qin, Huiling Liu & Cheng Wang

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  1. Huan Zhang
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V-doped Ni3N/Ni heterostructure with engineered interfaces as a bifunctional hydrogen electrocatalyst in alkaline solution: Simultaneously improving water dissociation and hydrogen adsorption

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Zhang, H., Wang, J., Qin, F. et al. V-doped Ni3N/Ni heterostructure with engineered interfaces as a bifunctional hydrogen electrocatalyst in alkaline solution: Simultaneously improving water dissociation and hydrogen adsorption. Nano Res. 14, 3489–3496 (2021). https://doi.org/10.1007/s12274-021-3559-9

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