Ruthenium nanoparticles modified oxidized, N-doped carbon substrates: Hydrogen generation electrocatalysts in alkaline and acidic conditions

被引：5
作者：
Zhang, Ya [1 ]
Wen, Fangfang [1 ]
Zhu, Ming [1 ]
Zhou, Zhifeng [1 ]
Tan, Jing [1 ]
Wang, Honggui [1 ,2 ,3 ]
机构：
[1] Yangzhou Univ, Sch Environm Sci & Engn, Yangzhou 225127, Jiangsu, Peoples R China
[2] Yangzhou Univ 26116120, Key Lab Prevent & Control Biol Hazard Factors Ani, Minist Agr China, Yangzhou 225127, Jiangsu, Peoples R China
[3] Yangzhou Univ, Jiangsu Key Lab Zoonosis, Yangzhou 225009, Jiangsu, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2018年 / 220卷
基金：
中国国家自然科学基金;
关键词：
Carbon substrates; Hydrogen evolution electrocatalysts; Oxidation; Ruthenium nanoparticles; EVOLUTION REACTION; HIGHLY EFFICIENT; RU NANOPARTICLES; METHANOL; CATALYST; OXIDATION; ELECTRODE; NANOFIBERS; NANOTUBES; GRAPHENE;
D O I：
10.1016/j.matchemphys.2018.09.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Various Ru nanoparticles modified porous carbon substrates were prepared as hydrogen evolution electrocatalysts via chemical reduction in this work. Before obtaining the Ru-based catalysts, different carbon substrates, including lignin, straw and shaddock peel, were selected. The carbon substrates were oxidized and nitrogen-doped under ammonia gas to further increase the physicochemical properties. Then, the nitrogen doped lignin, straw and shaddock peel were used as substrates to fabricate various Ru-based composites, which were denoted as Ru@o-NL, Ru@o-NS and Ru@o-NSP. The HER performances of Ru@o-NL, Ru@o-NS and Ru@o-NSP were fully investigated in both acidic and alkaline conditions. Experimental results indicated that all the Rubased composites could catalyze the hydrogen evolution reaction. Ru@o-NL showed better HER activity than that of the Ru@o-NS and Ru@o-NSP. The dosage of Ru could affect the HER activity. The Ru@o-NL with 8.0 wt % Ru loading has the best HER performance. The overpotentials (@ 10 mA cm(-2)) of the Ru@o-NL in 0.5 M H2SO4 and 1.0 M KOH were 42 and 14 mV, respectively. The corresponding Tafel slopes were 32 and 59 mV dec(-1). It also had large exchange current density and good long term stability.
引用
收藏
页码：299 / 307
页数：9
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