Ruthenium Cluster Decorated Titanium Dioxide Nanowire Arrays for Alkaline Hydrogen Evolution

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-11-13 DOI:10.1007/s10562-024-04857-x

Shipeng Wang, Longrun Sang, Feiyan Zhang, Yongcheng Li, Benhua Xu, Peng Zhang, Bingxin Liu, Yunsi Wang

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Abstract

Enhancing the performance of ruthenium (Ru)-based electrocatalysts for the alkaline hydrogen evolution reaction (HER) presents a significant challenge. Herein, titanium dioxide nanowire arrays decorated with ruthenium clusters were grown on carbon cloth (Ru-TiO₂ NWAs/CC) via a two-step hydrothermal method. The nanowire array structure increases the surface area of the substrate, allowing for more Ru clusters to be decorated, thereby improving catalytic activity. The resulting Ru₃–TiO₂ NWAs/CC catalyst exhibits prominent HER performance in 1.0 M KOH with overpotentials of 61 at 10 mA cm⁻² and a Tafel slope of only 47.4 mV dec⁻¹. Furthermore, it maintains outstanding stability under alkaline conditions for more than 10 h. The Ru clusters decoration enhances the TiO₂/CC kinetic, more active sites were exposed on nanowires of the surface and accelerated electron transport, thus reducing the charge transfer barrier. After the electrochemical test, the morphology and structure of Ru₃–TiO₂/CC remained largely unchanged, and the valence states of the elements remained stable. This work paves the road to exploiting highly active and cost-efficient electrocatalysts for alkaline hydrogen evolution.

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用于碱性氢气进化的钌簇装饰二氧化钛纳米线阵列

提高以钌（Ru）为基础的碱性氢气进化反应（HER）电催化剂的性能是一项重大挑战。在此，通过两步水热法在碳布（Ru-TiO2 NWAs/CC）上生长了装饰有钌团簇的二氧化钛纳米线阵列。纳米线阵列结构增加了基底的表面积，从而可以装饰更多的 Ru 簇，从而提高催化活性。所制备的 Ru3-TiO2 NWAs/CC 催化剂在 1.0 M KOH 中表现出卓越的 HER 性能，在 10 mA cm-2 时过电位为 61，Tafel 斜率仅为 47.4 mV dec-1。Ru 簇装饰增强了 TiO2/CC 的动力学性能，更多的活性位点暴露在表面纳米线上，加速了电子传输，从而降低了电荷转移障碍。经过电化学测试，Ru3-TiO2/CC 的形貌和结构基本保持不变，元素的价态也保持稳定。这项工作为开发高活性、低成本的碱性氢气进化电催化剂铺平了道路。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.