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Single-atom Catalysts Supported on Two-dimensional Tetragonal Transition Metal Chalcogenides for Hydrogen and Oxygen Evolution

Overview
Journal iScience
Publisher Cell Press
Date 2024 Jan 31
PMID 38292431
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Abstract

Single-atom catalysts (SACs) offer maximum metal atom utilization and high catalytic performance. Transition metal atoms on two-dimensional (2D) materials are effective for improving electrocatalytic performance. However, few studies exist on SACs supported on 2D tetragonal transition metal chalcogenides (TMX) for OER and HER. We report a detailed theoretical study using DFT calculations on SACs supported on TMX monolayers, denoted as TM@TMX. Our findings demonstrate that seven TM@TMX electrocatalysts surpass IrO (η = 0.56 V), with four TM@TMX exhibiting a reduced OER overpotential compared to RuO (η = 0.42 V). Additionally, four TM@TMX exhibit higher HER performance than Pt (111) (η = 0.10 V). We ultimately identified three SACs with high bifunctional HER/OER activity: Co@NiSe, Rh@NiTe, and Co@NiS. This study on TM@TMX provides insights for enhancing the HER and OER activities of SACs supported on 2D materials, which could have significant implications in clean and renewable energy.

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