Iron-doped Ag/Ni_(2)(CO_(3))(OH)_(2)hierarchical microtubes for highly efficient water oxidation  

作　　者：Huiwen Zhang Shuxuan Liu Enlai Hu Yunfei Yang Huimin Zhang Yuting Zhu Lijing Yan Xuehui Gao Jing Zhang Zhan Lin 

机构地区：[1]Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Department of Chemistry,Zhejiang Normal University,Jinhua,China [2]College of Materials and Chemistry,China Jiliang University,Hangzhou,China [3]Guangzhou Key Laboratory of Clean Transportation Energy Chemistry,Guangzhou Higher Education Mega Center,Guangdong University of Technology,Guangzhou,Guangdong,China

出　　处：《Carbon Energy》2022年第5期939-949,共11页碳能源（英文）

基　　金：Zhejiang Provincial Natural Science Foundation of China,Grant/Award Number:LQ20B010002。

摘　　要：Doping of foreign atoms and construction of unique structures are considered as effective approaches to design high-activity and strongdurability 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 1.0M KOH.Also,it could achieve long-term stability at a current density of 20 mA cm^(−2)for 24 h.

关 键 词：density functional theory Fe doping Ni2(CO3)(OH)2 hierarchical microtubes water oxidation reaction 

分 类 号：O64[理学—物理化学]