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Title: Heterointerface and tensile strain effects synergistically enhances overall water-splitting in Ru/RuO₂ aerogels
Authors: Sui, Nicole L. D.
Li, Yinghao
Xie, Wenjie
Wang, Guangzhao
Lee, Jong-Min
Keywords: Engineering::Chemical engineering
Issue Date: 2023
Source: Sui, N. L. D., Li, Y., Xie, W., Wang, G. & Lee, J. (2023). Heterointerface and tensile strain effects synergistically enhances overall water-splitting in Ru/RuO₂ aerogels. Small, 19(10), e2206844-.
Project: RG105/19 
Journal: Small 
Abstract: Designing robust electrocatalysts for water-splitting is essential for sustainable hydrogen generation, yet difficult to accomplish. In this study, a fast and facile two-step technique to synthesize Ru/RuO2 aerogels for catalyzing overall water-splitting under alkaline conditions is reported. Benefiting from the synergistic combination of high porosity, heterointerface, and tensile strain effects, the Ru/RuO2 aerogel exhibits low overpotential for oxygen evolution reaction (189 mV) and hydrogen evolution reaction (34 mV) at 10 mA cm-2 , surpassing RuO2 (338 mV) and Pt/C (53 mV), respectively. Notably, when the Ru/RuO2 aerogels are applied at the anode and cathode, the resultant water-splitting cell reflected a low potential of 1.47 V at 10 mA cm-2 , exceeding the commercial Pt/C||RuO2 standard (1.63 V). X-ray adsorption spectroscopy and theoretical studies demonstrate that the heterointerface of Ru/RuO2 optimizes charge redistribution, which reduces the energy barriers for hydrogen and oxygen intermediates, thereby enhancing oxygen and hydrogen evolution reaction kinetics.
ISSN: 1613-6810
DOI: 10.1002/smll.202206844
Schools: School of Chemistry, Chemical Engineering and Biotechnology 
Research Centres: Environmental Chemistry and Materials Centre
Nanyang Environment and Water Research Institute 
Rights: © 2023 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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