Insights into the state-of-the-art developments in defect engineering on molybdenum compounds for electrochemical hydrogen evolution reaction

초록

The development of stable, efficient, and affordable nanomaterials for electrochemical hydrogen evolution reaction (ECHER) plays a crucial role in innovation to zero carbon dioxide emission. Numerous electrocatalysts have been studied for ECHER, and they are supported by modern science and technology. Notably, molybdenum compounds have been recognized as potential candidates for transforming expensive platinum-based nanomaterials for ECHER due to their superior catalytic features and diverse structures and morphologies. This review highlights the recent approaches to defect engineering on molybdenum compounds for ECHER, including intrinsic and extrinsic defects. Moreover, synthetic strategies, such as chemical etching, hetero-atom doping, plasma processing, and state-of-the-art analysis techniques to identify defective structures, are also presented. Furthermore, simulation studies based on density functional theory (DFT) on defective Mo-based structures were provided to understand the relationship between structure and ECHER activity. Eventually, the challenges and prospects of defect engineering in molybdenum compounds for electrocatalytic water splitting will be discussed. (c) 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

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