揭示自立电极上钌态的和谐共存以增强氢气进化反应

IF 13 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Joonhee Ma, Jin Hyuk Cho, Chaehyeon Lee, Moon Sung Kang, Sungkyun Choi, Ho Won Jang, Sang Hyun Ahn, Seoin Back, Soo Young Kim
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引用次数: 0

摘要

开发具有成本效益、高效且耐用的电催化剂一直是推进氢气进化反应(HER)的首要任务。本文设计了一种简化的合成方案,通过酸活化、浸泡和高温热解,实现了由嵌入 Ru 单原子催化剂和 Ru 纳米团簇(ACP/RuSAC+C)的活性碳纸组成的自立电极。为了更深入地了解酸活化对碳纸的影响,该研究采用了 Ab initio 分子动力学(AIMD)计算。此外,还通过像差校正扫描透射电子显微镜(AC-STEM)、X 射线光电子能谱(XPS)和 X 射线吸收光谱(XAS)证实了 Ru 原子的共存状态。实验测量和理论计算显示,在 Ru 纳米团簇附近引入 Ru 单原子位点会产生协同效应,调整电子结构,从而显著提高催化性能。值得注意的是,ACP/RuSAC+C 的翻转频率(TOF)高达 18 s-1,质量活度(MA)达到 2.2 A mg-1,超过了传统铂电极的性能。这种自立电极具有和谐共存的 Ru 状态,是开发 HER 催化剂、提高能效、生产率和选择性的理想选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Unraveling the Harmonious Coexistence of Ruthenium States on a Self-Standing Electrode for Enhanced Hydrogen Evolution Reaction

Unraveling the Harmonious Coexistence of Ruthenium States on a Self-Standing Electrode for Enhanced Hydrogen Evolution Reaction

Unraveling the Harmonious Coexistence of Ruthenium States on a Self-Standing Electrode for Enhanced Hydrogen Evolution Reaction

The development of cost-effective, highly efficient, and durable electrocatalysts has been a paramount pursuit for advancing the hydrogen evolution reaction (HER). Herein, a simplified synthesis protocol was designed to achieve a self-standing electrode, composed of activated carbon paper embedded with Ru single-atom catalysts and Ru nanoclusters (ACP/RuSAC+C) via acid activation, immersion, and high-temperature pyrolysis. Ab initio molecular dynamics (AIMD) calculations are employed to gain a more profound understanding of the impact of acid activation on carbon paper. Furthermore, the coexistence states of the Ru atoms are confirmed via aberration-corrected scanning transmission electron microscopy (AC-STEM), X-ray photoelectron spectroscopy (XPS), and X-ray absorption spectroscopy (XAS). Experimental measurements and theoretical calculations reveal that introducing a Ru single-atom site adjacent to the Ru nanoclusters induces a synergistic effect, tuning the electronic structure and thereby significantly enhancing their catalytic performance. Notably, the ACP/RuSAC+C exhibits a remarkable turnover frequency (TOF) of 18 s−1 and an exceptional mass activity (MA) of 2.2 A mg−1, surpassing the performance of conventional Pt electrodes. The self-standing electrode, featuring harmoniously coexisting Ru states, stands out as a prospective choice for advancing HER catalysts, enhancing energy efficiency, productivity, and selectivity.

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来源期刊
Energy & Environmental Materials
Energy & Environmental Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
17.60
自引率
6.00%
发文量
66
期刊介绍: Energy & Environmental Materials (EEM) is an international journal published by Zhengzhou University in collaboration with John Wiley & Sons, Inc. The journal aims to publish high quality research related to materials for energy harvesting, conversion, storage, and transport, as well as for creating a cleaner environment. EEM welcomes research work of significant general interest that has a high impact on society-relevant technological advances. The scope of the journal is intentionally broad, recognizing the complexity of issues and challenges related to energy and environmental materials. Therefore, interdisciplinary work across basic science and engineering disciplines is particularly encouraged. The areas covered by the journal include, but are not limited to, materials and composites for photovoltaics and photoelectrochemistry, bioprocessing, batteries, fuel cells, supercapacitors, clean air, and devices with multifunctionality. The readership of the journal includes chemical, physical, biological, materials, and environmental scientists and engineers from academia, industry, and policy-making.
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