Oxygen-deficient TiO2 and Carbon Coupling Synergistically Boost the Activity of Ru Nanoparticles for the Alkaline Hydrogen Evolution Reaction
Oxygen-deficient TiO2 and Carbon Coupling Synergistically Boost the Activity of Ru Nanoparticles for the Alkaline Hydrogen Evolution Reaction
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缺氧 TiO2 和碳偶联协同增强 Ru 纳米颗粒的碱性析氢反应活性
DOI：
10.1039/d0ta11986e
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发表时间：
2021
影响因子：
11.9
通讯作者：
Jianguo Wang
中科院分区：
文献类型：
--
作者：
Zhongzhe Wei;Zijiang Zhao;Jing Wang;Qiang Zhou;Chenxia Zhao;Zihao Yao;Jianguo Wang
铂的储量有限和缓慢的H2O解离过程需要开发具有增强的碱性析氢反应催化性能的低成本催化剂。本文采用RuCl 3、TiO 2（B）和三聚氰胺一锅法制备了负载于缺氧TiO2@C杂化材料（Ru/TiO 2-VO@C）上的Ru纳米颗粒。三聚氰胺添加剂有助于氧空位（VO）和Ru 0的形成，并引入有益的碳掺杂剂。Ru/TiO 2-VO@C具有显著增强的碱性HER性能，其过电位仅为64 mV，电流密度为10 mA cm−2。这种令人满意的催化性能源于Ru与TiO 2-VO之间的强电子相互作用以及TiO 2-VO与碳掺杂剂之间的协同相互作用。这种协同作用提高了电导率，促进了H2O的解离并优化了氢吸附自由能。该研究为合理设计多组分纳米结构开辟了一条途径，并深入了解了碱性HER机制。
The limited reserves and sluggish H2O dissociation process of Pt necessitate the development of low-cost catalysts with enhanced catalytic performance in the alkaline hydrogen evolution reaction. Here, Ru nanoparticles supported on oxygen-deficient TiO2@carbon hybrids (Ru/TiO2-VO@C) were efficiently fabricated via one-pot carburization of RuCl3, TiO2(B) and melamine. The melamine additive assists the formation of oxygen vacancies (VO) and Ru0 and introduces a beneficial carbon dopant. Ru/TiO2-VO@C features a remarkably enhanced alkaline HER performance with an overpotential of only 64 mV to attain a current density of 10 mA cm−2. This satisfactory catalytic performance originates from the strong electronic interaction between Ru and TiO2-VO and the synergistic interplay between TiO2-VO and the carbon dopant. This synergistic cooperation improves the conductivity, promotes the dissociation of H2O and optimizes the hydrogen adsorption free energy. This study opens an avenue for the reasonable design of multi-component nanostructures and gives in-depth insights into the alkaline HER mechanism.