Reconstructed PbCO3 with abundant oxygen vacancies for efficient CO2-to-formate electrocatalysis

The electrosynthesis of valuable chemical feedstocks and fuels through the CO2 reduction reaction (CO2RR) provides a promising approach to solve the global warming problem and the energy crisis. Numerous studies have been devoted to developing electrocatalysts; however, few studies focus on Pb activ...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 12; no. 32; pp. 21406 - 21411
Main Authors Wang, Huan, Jia Yue Zhao, Qian Qian Yang, Jia Chen Wu, Xin Yu Zhang, Hai Yang Yuan, Xiao Lei Xu, Jing Jing He, Niu, Qiang, Liu, Peng Fei, Hua Gui Yang
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 13.08.2024
Subjects
Absorption spectroscopy
Carbon dioxide
Chemical reduction
Climate change
Electrocatalysts
Electrochemistry
Electron paramagnetic resonance
Electron spin resonance
Fine structure
Global warming
Infrared absorption
Infrared spectroscopy
Photoelectron spectroscopy
Photoelectrons
Spectrum analysis
Surface chemistry
Ultrastructure
X ray absorption
X ray photoelectron spectroscopy
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Summary:The electrosynthesis of valuable chemical feedstocks and fuels through the CO2 reduction reaction (CO2RR) provides a promising approach to solve the global warming problem and the energy crisis. Numerous studies have been devoted to developing electrocatalysts; however, few studies focus on Pb actives sites as well as the defect engineering of active sites. Herein, an O vacancy-rich PbCO3 electrocatalyst (O-PbCO3) derived Pb2(OH)2(CH3COO)2 precatalyst is reported. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) results prove the existence of O vacancies while the X-ray absorption fine structure (XAFS) results reveal the distorted structure of the O-PbCO3. Electrochemical measurements of the O-PbCO3 sample exhibit a remarkable selectivity and activity towards formate of over 90% in a wide range of current densities of 50 to 400 mA cm−2. Further in situ surface-enhanced infrared absorption spectroscopy (SEIRAS) characterization indicates that the O vacancies can optimize the adsorption of the *HCOO intermediate for enhanced CO2RR performance.
ISSN:2050-7488
2050-7496
DOI:10.1039/d4ta02989e