Structural tuning and reconstruction of CeO2-coupled nickel selenides for robust water oxidation

IF 9.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2025-01-20 DOI:10.1016/j.cclet.2025.110888

Kailu Guo , Jinzhi Jia , Huijiao Wang , Ziyu Hao , Yinjian Chen , Ke Shi , Haixia Wu , Cailing Xu

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Abstract

Heterogeneous catalysts have attracted wide attention due to their remarkable oxygen evolution reaction (OER) capabilities. Herein, a one-step strategy involving the coupling of Ni_xSe_y with CeO₂ is proposed to concurrently construct heterogeneous interfaces, adjust phase structure, and regulate electronic configuration, thereby enhancing OER performance. Thanks to the role of CeO₂ coupling in reducing the activation-energy and accelerating the reaction kinetics, the heterogeneous Ni_xSe_y/CeO₂ catalyst exhibits a low overpotential of 218 mV at 10 mA/cm² and long-term stability (>400 h) in 1.0 mol/L KOH for OER. Moreover, the post-OER characterization reveals that the Ni_xSe_y matrix is reconstructed into NiOOH, while the incorporated CeO₂ nanocrystals self-assemble into larger polycrystalline particles. Theoretical analysis further demonstrates that the optimized electronic states at NiOOH/CeO₂ interfaces can modulate intermediate chemisorption toward favorable OER kinetics. This study offers fresh perspectives on the synthesis and structure-activity relationship of CeO₂-coupled electrocatalysts.

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ceo2偶联硒化镍的结构调整与重构

非均相催化剂因其优异的析氧反应能力而受到广泛关注。本文提出了NixSey与CeO2的一步耦合策略，可同时构建异构接口、调整相位结构和调节电子组态，从而提高OER性能。由于CeO2偶联在降低活化能和加速反应动力学方面的作用，NixSey/CeO2多相催化剂在10 mA/cm2下具有218 mV的低过电位，在1.0 mol/L KOH条件下OER长期稳定（>400 h）。此外，后oer表征表明，NixSey矩阵重构为NiOOH，而加入的CeO2纳米晶体自组装成更大的多晶颗粒。理论分析进一步表明，NiOOH/CeO2界面上的优化电子态可以调节中间化学吸附，使其朝着有利的OER动力学方向发展。本研究为ceo2偶联电催化剂的合成和构效关系研究提供了新的视角。

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来源期刊

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.