Built-In Electric Field Engineering in CuCo2O4-CuO Heterostructures for Enhanced Ammonia Borane Hydrolytic Dehydrogenation

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-06-30 DOI:10.1016/j.jallcom.2025.181975

Mengmeng Tian, Jiarui Wang, Lanlan Li, Xiaofei Yu, Xinghua Zhang, Zunming Lu, Wei Shang, Xiaojing Yang

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引用次数: 0

Abstract

Hydrogen energy, as a crucial component of future energy systems, has garnered considerable attention recently. Among various hydrogen production methods, the hydrolysis of Ammonia borane (NH₃BH₃/AB) has been widely favored for its eco-friendly properties. However, developing high-performance non-precious metal catalysts remains a key challenge in this field. In this study, the interfacial electronic states were controlled by fabricating CuCo₂O₄-CuO heterojunctions exhibiting built-in electric fields (BIEF). At the heterogeneous interface, charge transfer driven by work function differences results in a cooperative active site featuring an electron-rich CuCo₂O₄ region and an electron-deficient CuO region. Furthermore, under the electrostatic adsorption driven by BIEF, AB and H₂O molecules are efficiently adsorbed and activated, thereby endowing CuCo₂O₄-CuO with remarkable catalytic activity. The hydrogen evolution reaction (HER) rate of this material is 2.29 times higher than that of single-component CuCo₂O₄ and 43.0 times greater than that of single-component CuO, demonstrating performance comparable to supported catalysts.

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CuCo2O4-CuO异质结构内建电场工程增强氨硼烷水解脱氢

氢能作为未来能源系统的重要组成部分，近年来引起了人们的广泛关注。在多种制氢方法中，氨硼烷（NH3BH3/AB）水解法因其环保特性而受到广泛青睐。然而，开发高性能的非贵金属催化剂仍然是该领域的关键挑战。在本研究中，通过制造具有内置电场（BIEF）的CuCo2O4-CuO异质结来控制界面电子态。在非均相界面上，由功函数差异驱动的电荷转移形成了富电子CuCo2O4区和缺电子CuO区的协同活性位点。此外，在BIEF驱动的静电吸附作用下，AB和H2O分子被有效吸附和活化，从而使CuCo2O4-CuO具有显著的催化活性。该材料的析氢反应速率是单组分CuCo2O4的2.29倍，是单组分CuO的43.0倍，具有与负载催化剂相当的性能。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.