Dual Doping of W and Cr on Co3O4 Accelerates Reconstruction for Improved Oxygen Evolution in Neutral Media

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-10-03 DOI:10.1016/j.jallcom.2025.184168

Lina Chen, Rui Yao, Yijie Zhang, Wei Li, Jinping Li, Guang Liu

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Abstract

The development of efficient oxygen evolution (OER) catalysts in neutral media is crucial for the production of biomixed fuels and chemicals. The unique reaction environment makes the reaction kinetics sluggish and poses significant challenges for catalyst design. Therefore, this study presents the synthesis of W, Cr-Co₃O₄ electrocatalysts using the hydrothermal calcination method for neutral OER. The doping of W and Cr modulates the electronic structure of Co₃O₄ and enhances electrical conductivity. Moreover, the double doping of W and Cr accelerates the catalyst's reconstruction, thereby improving catalytic activity. The optimized W, Cr-Co₃O₄ demonstrates efficient OER catalytic performance in 1 M phosphate buffer solution, with an overpotential of 347 mV at a current density of 10 mA cm^-2 and stable operation for over 100 hours. This work deepens the understanding of the reconstruction mechanism of OER catalysts in a neutral environment and provides valuable insights for the design of stable and efficient catalysts.

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W和Cr在Co3O4上的双掺杂加速了中性介质中析氧的重建

中性介质中高效析氧催化剂的开发对生物混合燃料和化学品的生产至关重要。独特的反应环境使得反应动力学缓慢，对催化剂设计提出了重大挑战。因此，本研究采用水热煅烧法合成W， Cr-Co3O4电催化剂。W和Cr的掺杂调节了Co3O4的电子结构，提高了电导率。此外，W和Cr的双掺杂加速了催化剂的重构，从而提高了催化活性。优化后的W， Cr-Co3O4在1 M磷酸盐缓冲溶液中表现出高效的OER催化性能，在电流密度为10 mA cm-2时过电位为347 mV，稳定运行超过100小时。本研究加深了对OER催化剂在中性环境下重构机理的认识，为设计稳定高效的催化剂提供了有价值的见解。

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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.