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IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2025-03-11 DOI:10.1016/j.jelechem.2025.119073

Xianglin Qiu , Guorong Ma , Shanshan Gao , Xukang Lang , Xiangmin Meng , Fushan Chen , Xiaoming Song

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引用次数: 0

摘要

氢能研究对可持续发展意义重大，而为碱性盐水中的氢进化过程（HER）制造高效稳定的电催化剂则是一个关键问题。本研究介绍了一种自支撑淀粉基碳气凝胶（SCA）电催化剂，该催化剂通过吸附和高温退火制得，并负载有 RuCo 合金。这种名为 RuCo/SCA-1-700 的催化剂具有优异的机械性能，可直接用作碱性盐水电解中的自支撑电极。值得注意的是，它在 1.0 M KOH 和 1.0 M KOH + 0.5 M NaCl 中的过电位分别为 41 mV 和 31 mV，电流密度达到 10mAcm-2。HER 性能的提高归功于碳气凝胶相互连接的多孔结构促进了有效的传质，也归功于 RuCo 合金内部过渡金属团聚的抑制作用。合金中 Ru 和 Co 之间的协同作用改变了活性位点的电子结构，优化了反应中间产物的化学吸附能。由于 RuCo/SCA-1-700 易于合成、原料丰富且具有出色的长期稳定性，因此很有希望用于大规模制氢。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

RuCo alloy-loaded starch-based carbon aerogel: A self-supported Electrocatalyst for efficient hydrogen evolution in alkaline saline water

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RuCo alloy-loaded starch-based carbon aerogel: A self-supported Electrocatalyst for efficient hydrogen evolution in alkaline saline water

Research on hydrogen energy is becoming significant for sustainable development, with the creation of efficient and stable electrocatalysts for the hydrogen evolution process (HER) in alkaline saline water representing a crucial issue. This study presents a self-supported starch-based carbon aerogel (SCA) electrocatalyst loaded with RuCo alloys, produced through adsorption and high-temperature annealing. The catalyst, RuCo/SCA-1-700, exhibits superior mechanical qualities, allowing its direct application as a self-supporting electrode in alkaline saline electrolysis. Remarkably, it achieves a current density of 10mAcm⁻² at low overpotentials of 41 mV and 31 mV in 1.0 M KOH and 1.0 M KOH + 0.5 M NaCl, respectively. The improved HER performance is due to the interconnected porosity architecture of the carbon aerogel, which facilitates efficient mass transfer, and to the inhibition of transition metal agglomeration within the RuCo alloy. The synergistic interaction between Ru and Co in the alloy alters the electronic structure of active sites, optimizing the chemisorption energies of reaction intermediates. Due to its facile synthesis, plentiful raw ingredients, and superior long-term stability, RuCo/SCA-1-700 seems promising for large-scale hydrogen production.

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.