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Research Article | Open Access | Online First

3D ordered RuO2/WO3 heterostructure inverse opal arrays for highly-active and stable acidic oxygen evolution reaction

Runlong Jia§, Yan Tan§, Aoshuang Li, Yijie Wang, Chuanwei Cheng( )
Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China

§ Runlong Jia and Yan Tan contributed equally to this work.

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Abstract

Development of highly active and stable acidic oxygen evolution reaction catalyst is very important for efficient water splitting while remains challenging. Herein, we report a highly ordered RuO2/WO3 inverse opals (IOs) catalyst to address the bottleneck problem of see-saw relationship between activity and stability, in which the crystalline and corrosion-resistant WO3 facilitates electron transport and stabilizes RuO2, whereas the lattice mismatch-induced amorphous-dominated RuO2 provides abundant unsaturated coordination sites to enhance the acidic oxygen evolution reaction (OER) activity. Consequently, the RuO2/WO3 IOs demonstrates outstanding acidic OER performance in terms of a low overpotential of 180 mV to reach 10 mA·cm–2, and excellent stability for maintaining 100 hours continuous test. Experimental characterizations and density functional theory calculations reveal that interface coupling between WO3 and RuO2 can enhance the spin polarization of electrons and increase the overlaps of the electronic projected density of states between the Ru d orbitals of active metal and the O p orbitals of oxygen intermediates, facilitating OER pathway to switch from lattice oxygen mechanism to adsorbate evolution mechanism, which significantly decreases the reaction energy barrier of OER process. Meanwhile, the rich oxygen vacancies and WO3 supports in the heterostructures could inhibit the over-oxidation of Ru species, so as to enhance the activity and stability simultaneously.

Keywords

inverse opal arraysheterostructureoxygen evolution reactionamorphousruthenium oxidetungsten oxide

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Nano Research Energy
DOI: 10.26599/NRE.2024.9120141
Cite this article:
Jia R, Tan Y, Li A, et al. 3D ordered RuO2/WO3 heterostructure inverse opal arrays for highly-active and stable acidic oxygen evolution reaction. Nano Research Energy, 2024, https://doi.org/10.26599/NRE.2024.9120141

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Received: 24 September 2024
Revised: 29 October 2024
Accepted: 30 October 2024
Published: 14 November 2024
© The Author(s) 2024. Published by Tsinghua University Press.

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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