New TiO2-Based Oxide for Catalyzing Alkaline Hydrogen Evolution Reaction with Noble Metal-Like Performance

被引:45
|
作者
Li, Ruchun [1 ]
Hu, Bihua [1 ]
Yu, Tongwen [1 ]
Shao, Zongping [2 ,3 ]
Wang, Yi [1 ]
Song, Shuqin [1 ]
机构
[1] Sun Yat Sen Univ, Key Lab Low Carbon Chem & Energy Conservat Guangd, PCFM Lab, Sch Mat Sci & Engn,Sch Chem Engn & Technol, Guangzhou 510275, Peoples R China
[2] Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat, State Key Lab Mat Chem Engn, Coll Chem Engn, Nanjing 211816, Peoples R China
[3] Curtin Univ, WA Sch Mines Minerals, Energy & Chem Engn, Perth, WA 6102, Australia
基金
中国国家自然科学基金;
关键词
anatase TiO2; doping; hydrogen evolution reaction; noble metal free catalysts; oxygen vacancies; WATER DISSOCIATION; EARTH-ABUNDANT; ELECTROCATALYSTS; NANOSHEETS; TIO2; NANOPARTICLES; CATALYSTS; ARRAYS; CARBON;
D O I
10.1002/smtd.202100246
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The development of cost-effective electrocatalysts with high activity and sufficient stability for hydrogen evolution reaction (HER) is crucial for the widespread application of water electrolysis for sustainable H-2 production. Transition metal oxides are desirable alternatives to replace benchmark Pt-based HER electrocatalysts because of their cost effectiveness, facile synthesis, versatile compositions, and easy electronic structure tuning. However, most available transition metal oxides show poor performance for HER catalysis. Here, it is reported that the anatase TiO2 can be efficiently developed into a superior HER electrocatalyst with comparable activity to Pt-based electrocatalysts in alkaline solution through simultaneous morphology control, proper lattice doping, and surface active sites engineering. Specifically, the obtained cobalt-doped TiO2 nanorod arrays (Co-TiO2@Ti(H-2)) show a low overpotential of only 78 mV at 10 mA cm(-2), a small Tafel plot of 67.8 mV dec(-1), and excellent stability even at an ultralarge current density of approximate to 480 mA cm(-2) in 1.0 m KOH solution. Theoretical calculations demonstrate that the introduction of Co with rich oxygen vacancies can efficiently lower the energy barrier for water adsorption/dissociation and H intermediate desorption. This work uncovers the potential of the low-cost transition metal oxides as alternative HER electrocatalysts in alkaline water electrolysis.
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页数:9
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