In-situ electrochemical reconstruction of CoCO₃@FeOOH for boosting high-current-density oxygen evolution reaction and freestanding Zn-air battery

Jiao, Chuanlai1; Xu, Zian3; Xia, Yu1; Chen, Shaoqing2; Wang, Hsing-Lin1,4

2023-12-01

10.1002/elan.202300327

ELECTROANALYSIS   影响因子和分区

1040-0397

1521-4109

The activity of electrocatalysts in the oxygen evolution reaction (OER) is crucial for the widespread applications of water electrolysis and zinc-air batteries. Iron-cobalt-based catalysts attract considerably interests due to their high intrinsic activity and stability. However, it is still challenging in further promoting the OER efficiency at the high current density (500 mA cm(-2)) and understanding the real active sites during the OER process. In this work, the composite catalyst, cobalt carbonate (CoCO3) and iron oxyhydroxide (FeOOH), were successfully synthesized on the carbon cloth (CoCO3@FeOOH/CC) by a facile hydrothermal method. Through in-situ electrochemical activation, the CoFe2O4/CoFeOOH catalyst (R-CoCO3@FeOOH/CC) exhibits significantly improved OER overpotential, 190 and 238 mV at the current density of 50 and 500 mA cm(-2). By the in-situ Raman spectroscopy analysis and microscopy observations, the reconstructed structure CoFe2O4/CoFeOOH was identified. Based on the highly active OER performance of R-CoCO3@FeOOH/CC, it enables the continuous operation of freestanding ZABs at the ultralow charge voltage of 1.74 V in 5 mA cm(-2). These findings offer valuable insights for the design and application of high-performance iron-cobalt-based OER catalysts.

cobalt carbonate electrochemical reconstruction iron oxyhydroxide oxygen evolution reaction Zn-air batteries

SCI ; EI

英语

第一 ; 通讯

Leading talents of the Guangdong province program[2016LJ06N507] ; Guangdong Provincial Key Laboratory of High Efficiency Utilization and Sustainable Development of Solar Energy[Y01256331] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001] ; Shenzhen Basic Research Program[JCYJ20190809144215761] ; National Natural Science Foundation of China[22205153] ; null[2017ZT07Z479]

Chemistry ; Electrochemistry

Chemistry, Analytical ; Electrochemistry

WOS:001113935500001

WILEY-V C H VERLAG GMBH

20234915164047

Current density ; Electrocatalysts ; Iron compounds ; Oxygen ; Zinc air batteries

Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

CHEMISTRY

2-s2.0-85178471450

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Soochow Univ, Soochow Inst Energy & Mat Innovat, Coll Energy, Jiangsu Prov Key Lab Adv Carbon Mat & Wearable Ene, Suzhou 215006, Peoples R China
3.Univ Macau, Inst Appl Phys & Mat Engn, Joint Key Lab Minist Educ, Taipa 999078, Macau, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China

Jiao, Chuanlai,Xu, Zian,Xia, Yu,et al. In-situ electrochemical reconstruction of CoCO₃@FeOOH for boosting high-current-density oxygen evolution reaction and freestanding Zn-air battery[J]. ELECTROANALYSIS,2023,36(2).

Jiao, Chuanlai,Xu, Zian,Xia, Yu,Chen, Shaoqing,&Wang, Hsing-Lin.(2023).In-situ electrochemical reconstruction of CoCO₃@FeOOH for boosting high-current-density oxygen evolution reaction and freestanding Zn-air battery.ELECTROANALYSIS,36(2).

Jiao, Chuanlai,et al."In-situ electrochemical reconstruction of CoCO₃@FeOOH for boosting high-current-density oxygen evolution reaction and freestanding Zn-air battery".ELECTROANALYSIS 36.2(2023).