Stepwise Electrochemical Construction of FeOOH/Ni(OH)(2) on Ni Foam for Enhanced Electrocatalytic Oxygen Evolution
文献类型： 外文期刊
作者： Niu, Siqi 1 ; Sun, Yanchun 2 ; Sun, Guoji 3 ; Rakov, Dmitrii 1 ; Li, Yuzhi 1 ; Ma, Yan 1 ; Chu, Jiayu 1 ; Xu, Ping 1 ;
作者机构： 1.Harbin Inst Technol, MIIT Key Lab Crit Mat Technol New Energy Convers, Sch Chem & Chem Engn, 92 West Dazhi St, Harbin 150001, Heilongjiang, Peoples R China
2.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Lab Qual & Safety Risk Assessment Aquat Prod Harb, Harbin 150070, Heilongjiang, Peoples R China
3.Harbin Inst Technol, Shenzhen Grad Sch, State Key Lab Adv Welding & Joining, Shenzhen 518055, Peoples R China
关键词： FeOOH; electrodeposition; electrophoretic deposition; electrocatalysis; oxygen evolution reaction
期刊名称：ACS APPLIED ENERGY MATERIALS （ 影响因子：6.024； 五年影响因子：6.025 ）
ISSN： 2574-0962
年卷期： 2019 年 2 卷 5 期
页码：
收录情况： SCI
摘要： As the oxygen evolution reaction (OER) is the bottleneck of electrocatalytic water splitting, it is highly imperative to develop OER catalysts with excellent activity and stability. Herein, we demonstrate a stepwise electrochemical construction of crystalline alpha-FeOOH/beta-Ni(OH)(2) composite structure supported on nickel foam (FeOOH/Ni(OH)(2)/NF) through cathodic electrodeposition of beta-Ni(OH)(2) nanosheets followed by electrophoretic deposition of alpha-FeOOH nanoparticles. Taking advantange of the synergistic effect of Ni and Fe as well as the formed interface, this composite structure is highly active for the OER process in alkaline media (1 M KOH), providing a very low overpotential of 207 mV versus the reversible hydrogen electrode (RHE) at a geometric catalytic current density of 40 mA cm(-2) and a Tafel slope of 70 mV dec(-1), which is superior to most reported (oxy)hydroxide-based OER electrocatalysts. In combination with density functional theory (DFT) calculations, it is verified that the synergistic interface effect between the real active sites NiOOH and FeOOH can facilitate the OER process. We believe this stepwise electrochemical technique for constructing Ni-Fe (oxy)hydroxide composites can provide new insights into the design and synthesis of highly efficient electrocatalysts for energy conversion applications.
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