Ru nanoparticles supported on partially reduced TiO2 as highly efficient catalyst for hydrogen evolution
Ru nanoparticles supported on partially reduced TiO2 as highly efficient catalyst for hydrogen evolution
复制标题
部分还原的 TiO2 负载 Ru 纳米粒子作为高效析氢催化剂
DOI：
10.1016/j.nanoen.2021.106211
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发表时间：
2021-06-19
期刊：
影响因子：
17.6
通讯作者：
Zhou, Zhi-You
中科院分区：
文献类型：
--
作者：
Chen, Li-Na;Wang, Su-Heng;Zhou, Zhi-You
开发低成本高效的析氢反应催化剂是实现大规模、清洁、可持续的水裂解制氢的关键。调整催化剂的界面结构已成为优化催化剂本征催化活性的有效策略。在这项研究中，我们展示了Ru纳米颗粒的沉积，新制备的强还原性Ti（III）氧化物，导致Ru/还原TiO2界面与氧空位。制备的Ru/r-TiO2在碱性介质中表现出优于商用Pt/C的HER性能，仅需要15 mV的小过电位就可以提供10 mA cm（-2）的基准电流密度，并且在过电位为100 mV时可以实现8.74 s（-1）的高周转频率。密度泛函理论计算表明，Ru/r-TiO2的高电催化活性源于还原TiO2促进水解离和削弱OH吸附，有利于水转化为H-2。这项工作为设计高性能HER催化剂提供了一种有效的策略。
The development of low-cost yet highly efficient catalysts for hydrogen evolution reaction (HER) is crucial for large-scale clean and sustainable hydrogen production from water splitting. Tuning the interfacial structure of catalyst has emerged as an effective strategy to optimize the intrinsic catalytic activity. In this study, we demonstrated the deposition of Ru nanoparticles by freshly prepared strong reductive Ti(III) oxide, resulting in Ru/reduced TiO2 interface with oxygen vacancies. The as-prepared Ru/r-TiO2 exhibited a superior HER performance over commercial Pt/C in alkaline media, with only a small overpotential of 15 mV required to deliver the benchmark current density of 10 mA cm(-2) and a high turnover frequency of 8.74 s(-1) achieved at an overpotential of 100 mV. Density functional theory calculation indicates that high electrocatalytic activity of Ru/r-TiO2 is originated from the promotion of water dissociation and weakening OH adsorption by reduced TiO2 , which facilitate the conversion of water to H-2. This work provides an efficient strategy for the design of high-performance HER catalysts.