Ru nanoassembly catalysts for hydrogen evolution and oxidation reactions in electrolytes at various pH values
文献类型： 外文期刊
作者： Li, Yuzhi 1 ; Abbott, Janel 2 ; Sun, Yanchun 3 ; Sun, Jianmin 1 ; Du, Yunchen 1 ; Han, Xijiang 1 ; Wu, Gang 2 ; Xu, Ping 1 ;
作者机构： 1.Harbin Inst Technol, Sch Chem & Chem Engn, MITT Key Lab Crit Mat Technol New Energy Convers, Harbin 150001, Heilongjiang, Peoples R China
2.SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA
3.Chinese Acad Fishery Sci, Minist Agr, Lab Qual & Safety Risk Assessment Aquat Prod Harb, Heilongjiang River Fisheries Res Inst, Harbin 150070, Heilongjiang, Peoples R China
关键词： Ru nanoassembly; Electrocatalysts; HER; HOR; Reversible fuel cells
期刊名称：APPLIED CATALYSIS B-ENVIRONMENTAL （ 影响因子：19.503； 五年影响因子：17.291 ）
ISSN： 0926-3373
年卷期： 2019 年 258 卷
页码：
收录情况： SCI
摘要： Here, in an effort to prepare Ru-based metal organic frameworks, we developed a one-step solvothermal synthesis for Ru nanoassembly catalysts, which consist of (similar to)4 nm Ru nanoparticles well dispersed on amorphous carbon (Ru/C). The Ru/C catalyst obtained from a mixed solvent of H2O and CH3CH2OH (Ru/C-H2O/CH3CH2OH), featured a chain-like porous structure, provides Pt-like catalytic properties with low overpotentials at -10 mA cm(-2) for the hydrogen evolution reaction (HER) within a wide range of pH values, i.e., 35 mV in 0.5 M H2SO4, 53 mV in 1.0 M KOH, and 93 mV in 3.5 wt% NaCl. Ru/C is also an efficient hydrogen oxidation reaction (HOR) catalyst at all pH values. In the alkaline media, Ru/C-H2O/CH3CH2OH achieves a mass activity of 41.1 mA mg(-1) at an overpotential of 50 mV and a high exchange current density (0.65 mA cm(-2)). The work provides a facile strategy to synthesize highly active Ru/C catalysts for bifunctional HER and HOR electrocatalysis.
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