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

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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Abstract

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.