4.7 Article

Effect of intrinsic and extrinsic activity of electrocatalysts on anion exchange membrane water electrolyzer

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CHEMICAL ENGINEERING JOURNAL
卷 472, 期 -, 页码 -

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ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2023.145150

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Anion exchange membrane water electrolysis; Electrocatalysts; Metal organic framework; Hydrogen energy; Oxygen evolution reaction; Water splitting; Water electrolysis

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We demonstrated the synergistic effects of intrinsic and extrinsic engineering on the performance of CuCo oxide for anion exchange membrane (AEM) electrolyzers. Intrinsic improvement was achieved by replacing Cu with Co3O4 (P-CCO), resulting in superior catalytic activity for the oxygen evolution reaction (OER). Extrinsic improvement was achieved by fabricating Z-CCO with a larger electrochemical surface area and improved OER catalytic activity through surface morphology engineering using a metal-organic framework (MOF). These improvements significantly enhanced the performance of the AEM electrolyzer, with the intrinsically improved Z-CCO exhibiting the highest energy efficiency.
Despite the promising potential of non-platinum group metal (non-PGM) electrocatalysts for hydrogen production in anion exchange membrane (AEM) electrolyzers, their practical implementation remains challenging. Herein, we demonstrate the synergistic effects of intrinsic and extrinsic engineering on the performance of CuCo oxide for AEM electrolyzer. Intrinsic improvement was achieved by replacing Cu with Co3O4 (P-CCO), resulting in superior catalytic activity for the oxygen evolution reaction (OER) compared to Co3O4 (P-CO). Extrinsic improvement was achieved by fabricating Z-CCO with a larger electrochemical surface area and improved OER catalytic activity by engineering the surface morphology of P-CCO using a metal-organic framework (MOF). The intrinsic and extrinsic improvements dramatically enhanced the performance of the AEM electrolyzer, with the AEM electrolyzer featuring the intrinsically improved Z-CCO displaying the highest energy efficiency.

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