DOI: 10.1016/j.jcou.2018.08.016
Scopus记录号: 2-s2.0-85052740412
论文题名: Double-layer effect on the kinetics of CO2 electroreduction at cathodes bearing Ag, Cu, and Ag/Cu nano-arrays electrodeposited by potentiostatic double-pulse
作者: Banda-Alemán J.A. ; Orozco G. ; Bustos E. ; Sepúlveda S. ; Manríquez J.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 27 起始页码: 459
结束页码: 471
语种: 英语
英文关键词: Bimetallic Ag/Cu nanoparticulate arrays
; CO2 electrochemical reduction
; Current exchange density
; Double-layer effects
; Electron-transfer kinetics
Scopus关键词: Carbon dioxide
; Cathodes
; Charge transfer
; Copper
; Electrolytic reduction
; Kinetics
; Solvents
; Charge transfer kinetics
; Double layer effect
; Double pulse techniques
; Electrocatalytic properties
; Electrochemical reductions
; Electron transfer kinetics
; Nano particulates
; Rate-determining step
; Silver
英文摘要: In-doped SnO2 (ITO) cathodes bearing Ag, Cu and bimetallic Ag/Cu nanoparticulate arrays (cathode systems ITO//Ag, ITO//Cu and ITO//Ag/Cu, respectively) were prepared by a potentiostatic double-pulse technique and employed for studying the multi-step charge-transfer kinetics of CO2 electrochemical reduction (CO2ER) in propylene carbonate solution. Our results demonstrated, on one hand, that the current exchange density of the rate-determining step (rds) for the CO2 electrochemical reduction (io,rds) depends, predominantly, on the values achieved by the outer-Helmholtz plane (OHP) potential (ΔψOHP, rds) on the three cathode systems here explored. Furthermore, these results showed that a large ΔψOHP, rds (-647 mV) promoted a large io,rds (1.09 × 10-2 A· cm-2) for CO2 reduction at the cathode system ITO//Cu, whereas a small ΔψOHP, rds (-168 mV) produced a small io,rds (2.05 × 10-4 A· cm-2) for CO2 reduction at the cathode system ITO//Ag. In contrast, intermediate values of ΔψOHP, rds and io,rds (-333 mV, 1.09 × 10-3 A· cm-2) were found for CO2 reduction on the cathode system ITO//Ag/Cu, demonstrating that the individual electrocatalytic properties of Ag and Cu can be coupled in a bimetallic array to intentionally tune the CO2ER rate in nonaqueous solvents having low proton availability. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111774
Appears in Collections: 气候减缓与适应
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作者单位: Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C, Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Qro, 76703, Mexico; Centro de Innovación, Investigación y Desarrollo en Ingeniería y Tecnología, Universidad Autónoma de Nuevo León, Mexico
Recommended Citation:
Banda-Alemán J.A.,Orozco G.,Bustos E.,et al. Double-layer effect on the kinetics of CO2 electroreduction at cathodes bearing Ag, Cu, and Ag/Cu nano-arrays electrodeposited by potentiostatic double-pulse[J]. Journal of CO2 Utilization,2018-01-01,27