Electronic structure engineering of CoS catalysts by rhenium modification for efficient alkaline hydrogen evolution

IF 11 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-07-30 DOI:10.1007/s12598-025-03486-6

Jian-Min Yu, Yong-Teng Qian, Sohyeon Seo, Ngoc-Quang Tran, Xiao-Dong Shao, Yang Liu, Jin-Sun Lee, Thi-Anh Le, Hyoyoung Lee, Li-Shan Peng

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Abstract

Fabricating a durable electrocatalyst with performance comparable to noble metals for the alkaline hydrogen evolution reaction (HER) remains a significant challenge. In this work, we introduce a highly efficient and robust electrocatalyst by incorporating rhenium (Re) atoms into CoS nanoflakes (Re-CoS) for alkaline HER. The incorporation of Re atoms into the CoS lattice enhances the hybridization of Co 3d and S 2p orbitals, resulting in an optimized electronic structure that accelerates water dissociation on Co sites and optimizes hydrogen adsorption–desorption on S sites, thereby boosting the HER rate. The optimal Re-CoS catalyst demonstrates a low overpotential of 72 mV at 10 mA cm⁻² in 1 M KOH, along with excellent long-term stability, maintaining its catalytic activity over 200 h without significant degradation. These results suggest that the incorporation of Re atoms into CoS effectively couples the water dissociation and hydrogen ad-desorption steps of alkaline HER, offering a promising strategy for the development of noble metal-like electrocatalysts.

Graphical abstract

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稀土改性CoS催化剂高效碱性析氢的电子结构工程

为碱性析氢反应（HER）制造一种性能与贵金属相当的耐用电催化剂仍然是一个重大挑战。在这项工作中，我们通过将铼（Re）原子掺入CoS纳米片（Re-CoS）中来引入一种高效、稳健的电催化剂，用于碱性HER。Re原子加入到CoS晶格中增强了Co 3d和s2p轨道的杂化，从而优化了电子结构，加速了Co位点上的水解离，优化了S位点上氢的吸附-解吸，从而提高了HER速率。最佳Re-CoS催化剂在1 M KOH条件下，在10 mA cm−2下的过电位为72 mV，并且具有良好的长期稳定性，在200 h内保持催化活性而不会出现明显的降解。这些结果表明，在CoS中加入Re原子有效地耦合了碱性HER的水解离和氢吸附步骤，为开发类贵金属电催化剂提供了一种有前途的策略。图形抽象

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.