期刊
ACS APPLIED NANO MATERIALS
卷 4, 期 8, 页码 8530-8538出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c01847
关键词
resistant to oxidation; hollow Ru; ultrasmall nanoparticle; electrocatalysis; hydrogen evolution reaction
资金
- Innovation Fund for Young Scholars [CX2019025]
- Nanjing Forestry University - Priority Academic Program Development of Jiangsu Higher Education Institutions
A hollow Ru nanostructure (h-RuNP) was developed as a highly efficient and stable Pt-free electrocatalyst for the hydrogen evolution reaction. It demonstrated superior catalytic activity and long-term stability compared to pure Ru and Ru-based nanocatalysts, approaching that of commercial 20% Pt/C catalyst. The enhanced performance of h-RuNP was attributed to the strong surface oxidation resistance and antiaggregation effect of unsupported ultrasmall Ru nanoparticles.
The development of highly efficient and robust Pt-free electrocatalysts toward the hydrogen evolution reaction (HER) is facing increasing demand. Herein, we demonstrate a hollow Ru nanostructure (h-RuNP) that is fabricated with an ultrasmall Ru nanoparticle of similar to 1.72 nm and is resistant to oxidation. The construction of h-RuNP was done using preformed Ni nanocrystals as reducing agents in dimethylformamide (DMF) without the need of any inert gas atmosphere (such as N-2) or stabilizing agents. Studies indicate that both the solvent DMF and the ultrasmall Ru nanoparticles help to prevent the surface oxidation of Ru. The as-synthesized h-RuNP possesses robust catalytic activity toward HER in acidic media, which is superior to that of recently reported pure Ru and Ru-based nanocatalysts and close to that of the commercial 20% Pt/C catalyst. The h-RuNP also exhibits exceptional long-term stability under natural ambient conditions (no nitrogen is added to remove oxygen). The enhanced performance of h-RuNP mainly arose from the strong surface oxidation resistance and antiaggregation effect of unsupported ultrasmall Ru nanoparticles.
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