Dual-Interface-Induced Multi-Active Sites in Polypyrrole-Encapsulated Bimetallic Oxide Heterostructures for Enhanced Overall Water Splitting

IF 5.2 3区工程技术 Q2 ENERGY & FUELS

Energy & Fuels Pub Date : 2025-05-27 DOI:10.1021/acs.energyfuels.5c0051310.1021/acs.energyfuels.5c00513

Wenjuan Lu, Qian Liao, Xiaodong Cai*, Qi Li, Danhua Jiao* and Rongrong Wang,

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引用次数: 0

Abstract

The construction of multicomponent coupled interfaces is crucial to designing highly effective and robust bifunctional electrocatalysts for water splitting. Spinel oxides are widely used as efficient catalysts; nonetheless, their catalytic activity requires enhancement. Experimental results reveal that the interfacial coupling and synergistic effect between the conductive PPy and Co₃O₄/CoMoO₄, characterized by tunable electronic configuration, enhance charge transport and optimize the electronic structure of the coupled interface. This integrated PPy can improve the conductivity and ensure the durability of Co₃O₄/CoMoO₄-PPy. Thanks to the advantages mentioned above, the obtained Co₃O₄/CoMoO₄-PPy (CoO/CoMoO-PPy) exhibits exceptional catalytic properties with overpotentials of 76 mV for the hydrogen evolution reaction (HER) and 270 mV for the oxygen evolution reaction (OER) at 10 mA cm^–2. Remarkably, the assembled CoO/CoMoO-PPy||CoO/CoMoO-PPy acquires only 1.59 V at 10 mA cm^–2 in 1.0 M KOH with a durability of 40 h. This study provides a significant reference for designing bimetallic oxide/polymer catalysts toward high-efficiency overall water splitting.

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多吡咯包封双金属氧化物异质结构中双界面诱导的多活性位点增强整体水分解

多组分耦合界面的构建是设计高效、稳健的双功能水分解电催化剂的关键。尖晶石氧化物作为高效催化剂被广泛应用；尽管如此，它们的催化活性需要增强。实验结果表明，导电PPy与Co3O4/CoMoO4之间的界面耦合和协同效应具有可调谐的电子组态，增强了电荷输运，优化了耦合界面的电子结构。这种集成PPy可以提高Co3O4/CoMoO4-PPy的导电性和耐久性。由于上述优点，得到的Co3O4/CoMoO4-PPy （CoO/ CoMoO4-PPy）在10 mA cm-2下的析氢反应（HER）和析氧反应（OER）的过电位分别为76 mV和270 mV，具有优异的催化性能。值得注意的是，组装后的CoO/CoMoO-PPy在1.0 M KOH条件下，在10 mA cm-2条件下获得1.59 V的电压，其耐久时间为40 h。该研究为设计高效整体水分解的双金属氧化物/聚合物催化剂提供了重要参考。

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来源期刊

Energy & Fuels 工程技术-工程：化工

CiteScore

9.20

自引率

13.20%

发文量

1101

审稿时长

2.1 months

期刊介绍： Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.