Iron‐doped Ag/Ni2(CO3)(OH)2 hierarchical microtubes for highly efficient water oxidation
Huiwen Zhang,
Shuxuan Liu,
Enlai Hu,
Yunfei Yang,
Huimin Zhang,
Yuting Zhu,
Lijing Yan,
Xuehui Gao,
Jing Zhang,
Zhan Lin
Affiliations
Huiwen Zhang
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University Jinhua China
Shuxuan Liu
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University Jinhua China
Enlai Hu
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University Jinhua China
Yunfei Yang
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University Jinhua China
Huimin Zhang
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University Jinhua China
Yuting Zhu
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University Jinhua China
Lijing Yan
College of Materials and Chemistry China Jiliang University Hangzhou China
Xuehui Gao
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University Jinhua China
Jing Zhang
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University Jinhua China
Zhan Lin
Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangzhou Higher Education Mega Center Guangdong University of Technology Guangzhou Guangdong China
Abstract Doping of foreign atoms and construction of unique structures are considered as effective approaches to design high‐activity and strong‐durability electrocatalysts. Herein, we report Fe‐doped nickel hydroxide carbonate hierarchical microtubes with Ag nanoparticles (denoted Ag/NiFeHC HMTs) through hydrolysis precipitation process. Experimental tests and density functional theory calculations reveal that Fe doping can tune the electron configuration to enhance the conductivity, markedly improve the electrochemical surface area to expose more active sites, and act as reactive centers to lower the free energy of the rate determination step. In addition, the unique hierarchical structure can also offer active sites and excellent cycling stability. Benefitting from these advantages, the as‐obtained Ag/NiFeHC HMTs show excellent oxygen evolution reaction activity, with an overpotential of 208 mV at 10 mA cm−2 in 1.0 M KOH. Also, it could achieve long‐term stability at a current density of 20 mA cm−2 for 24 h.
