自支撑合金电极上的双卤化合金配位工程,用于增强氢进化反应

IF 3.5 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Shaobo Huang, Fanhui Meng, Jianhui Dong, Wenhao Zhuang, Zexin Liang, Chengfeng Fan, Xiaoyi Hou, Huiwen Wang
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引用次数: 0

摘要

电化学氢进化反应(HER)因其成本效益高、性能优越以及可重复实施的可扩展性,在大规模绿色制氢方面大有可为。一种具有自支撑框架的新型过渡金属钙钛矿有望改善氢进化反应的反应动力学。我们通过简单的一步化学气相沉积工艺合成了一种纳米三维自支撑 HER 催化剂。这种方法将硫(S)和硒(Se)的双重共反应结合到市售蒙乃尔合金(CNSSe)上。动态离子交换氧化还原反应促进了异质催化剂结构的形成。密度泛函理论(DFT)计算表明,CNSSe 催化剂的氢覆盖率较低,吸附氢的热中性自由能(ΔGH*)为 0.105 eV,这可归因于 S 和 Se 的双重引入。因此,与只引入 S 或 Se 的催化剂相比,经过优化的 CNSSe 电催化剂的 HER 性能提高了 100%。这些结果凸显了优化的 CNSSe 电催化剂在提高碱性水电解中 HER 技术的性能和经济可行性方面的巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Dual chalcogenide coordination engineering on a self-supported alloy electrode for enhanced hydrogen evolution reaction

Dual chalcogenide coordination engineering on a self-supported alloy electrode for enhanced hydrogen evolution reaction
The electrochemical hydrogen evolution reaction (HER) holds substantial promise for large-scale green hydrogen production due to its cost-effectiveness, high performance, and scalability for repeated implementation. A promising strategy that involves a novel transition-metal chalcogenide with a self-supported framework can improve the reaction kinetics in the HER. We synthesize a nano three-dimensional self-supported HER catalyst via a straightforward one-step chemical vapor deposition process. This method incorporates a dual co-reaction with sulfur (S) and selenium (Se) onto a commercially available Monel alloy (CNSSe). The dynamics ion exchange redox reactions promote the formation of heterogeneous catalyst structures. Density functional theory (DFT) calculations indicate that the CNSSe catalyst exhibits low hydrogen coverage, as evidenced by a thermoneutral free energy of adsorbed hydrogen (ΔGH*) of 0.105 eV, which can be attributed to the dual introduction of S and Se. Consequently, the optimized CNSSe electrocatalyst achieves an enhancement in HER performance exceeding 100% compared to catalysts introduced exclusively with either S or Se. These results underscore the substantial potential of the optimized CNSSe electrocatalyst to improve both the performance and economic feasibility of HER technologies in alkaline water electrolysis.
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来源期刊
Dalton Transactions
Dalton Transactions 化学-无机化学与核化学
CiteScore
6.60
自引率
7.50%
发文量
1832
审稿时长
1.5 months
期刊介绍: Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.
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