用于高效析氧的双壳结构混合尖晶石氧化物

IF 13.2 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-03-11 DOI:10.1016/j.cej.2025.161462

Lei Fu, Jun Zhou, Yunqing Kang, Hongfei Zhao, Yingji Zhao, Zilin Zhou, Kaiteng Wang, Kai Wu, Yusuke Yamauchi

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引用次数: 0

摘要

具有尖晶石结构和反尖晶石结构的尖晶石氧化物被认为是极具潜力的氧进化反应（OER）电催化剂。然而，同时激活两种尖晶石结构的复合材料是释放其催化潜能的关键，但这仍然具有挑战性。在此，我们展示了一种共掺杂策略，将镍和铁元素同时引入磷改性 Co3O4 微球复合材料，以优化电子分布并产生丰富的氧缺陷。此外，由此产生的双壳结构可实现快速传质并增强电解质富集。因此，磷掺杂的三元 Ni-Fe-Co 氧化物具有 252 mV 的低过电位，可达到 10 mA cm-2 的电流密度，性能优于商用 RuO2。这项工作为通过制造双型尖晶石复合物来提高尖晶石氧化物的 OER 活性提供了一种有效的方法。

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Double-shell structured mixed-spinel oxides for highly efficient oxygen evolution

Spinel oxides with both spinel and inverse spinel structures are considered highly promising electrocatalysts for the oxygen evolution reaction (OER). However, simultaneously activating two types of spinel-structured composites is essential to unlock their catalytic potential, yet this remains challenging. Herein, we demonstrate a co-doping strategy to introduce both Ni and Fe elements into phosphorus-modified Co₃O₄ microsphere composites to optimize electron distribution and generate abundant oxygen defects. Additionally, the resulting double-shell structure enables rapid mass transfer and enhanced electrolyte enrichment. As a result, the phosphorus-doped ternary Ni-Fe-Co oxide exhibits a low overpotential of 252 mV to achieve a current density of 10 mA cm⁻², outperforming commercial RuO₂. This work provides an effective approach to enhancing the OER activity of spinel oxides by fabricating dual-type spinel complexes.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.