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Research Article | Open Access

Atomic Heterointerface Engineering of Nickel Selenide Confined Nickel Molybdenum Nitride for High-Performance Solar-Driven Water Splitting

Jingqiang Wang1 , Duy Thanh Tran1 ( ), Kai Chang1, Sampath Prabhakaran1 , Do Hwan Kim2, Nam Hoon Kim1 , Joong Hee Lee1,3 ( )
Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Korea
Division of Science Education, Graduate School of Department of Energy Storage/Conversion Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Korea
Carbon Composite Research Center, Department of Polymer-Nano Science and Technology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Korea
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Abstract

A heterostructured electrocatalyst of small NiSe2 nanoparticles confined NiMoN nanorods (NiSe2–NPs/NiMoN–NRs) is prepared to accelerate both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in a same alkaline medium. The synergistic effects caused by the combination of merits derived from NiSe2 and NiMoN phases trigger an optimum electronic structure with high density of state at near Fermi level and enhance adsorption free energy, thereby resulting in excellent catalytic activities and strengthened working stability. The catalyst requires a low overpotential of 58 mV for HER and 241 mV for OER to reach 10 mA cm−2 in 1.0 M KOH electrolyte. A two-electrode electrolyzer based on the developed catalyst shows outstanding cell voltage of 1.51 and 1.46 V to reach 10 mA cm−2 in 1.0 M and 30 wt% KOH solution at 25 ℃ for overall water splitting, respectively. In addition, the solar-driven water splitting process delivers a high solar-to-H2 conversion efficiency of ~18.4%, impressively unveiling that the developed bifunctional catalyst is highly potential for overall water splitting to produce green hydrogen fuel.

Keywords

Bifunctional electrocatalystNovel NiSe2/NiMoN heterostructuresSolar-driven water splittingSynergistic effects

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Energy & Environmental Materials
Volume 6 Issue 2,
March 2023
DOI: 10.1002/eem2.12526

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Cite this article:
Wang J, Tran DT, Chang K, et al. Atomic Heterointerface Engineering of Nickel Selenide Confined Nickel Molybdenum Nitride for High-Performance Solar-Driven Water Splitting. Energy & Environmental Materials, 2023, 6(2). https://doi.org/10.1002/eem2.12526

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Received: 07 June 2022
Revised: 21 August 2022
Published: 29 August 2022
© 2022 The Authors.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.