DOI: 10.1016/j.jcou.2018.09.009
Scopus记录号: 2-s2.0-85053694592
论文题名: Ligand-free gold nanoparticles supported on mesoporous carbon as electrocatalysts for CO2 reduction
作者: Miola M. ; Hu X.-M. ; Brandiele R. ; Bjerglund E.T. ; Grønseth D.K. ; Durante C. ; Pedersen S.U. ; Lock N. ; Skrydstrup T. ; Daasbjerg K.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 28 起始页码: 50
结束页码: 58
语种: 英语
英文关键词: CO2 reduction
; Deactivation
; Electrocatalysis
; Gold nanoparticles
; Mesoporous carbon
Scopus关键词: Carbon
; Carbon dioxide
; Catalysis
; Chelation
; Electrocatalysis
; Electrocatalysts
; Electrolytes
; Electrolytic reduction
; Fiber optic sensors
; Gold compounds
; Gold nanoparticles
; Hybrid materials
; Ligands
; Mesoporous materials
; Metal nanoparticles
; Aqueous electrolyte
; Catalyst stability
; CO2 reduction
; Deactivation
; Deactivation mechanism
; Electrochemical reductions
; Mesoporous carbon
; Organic ligands
; Catalyst activity
英文摘要: Gold nanoparticles (AuNPs) have shown good catalytic activity for electrochemical CO2 reduction. However, they are typically stabilized by poorly conductive organic ligands which partially block their activity for electrocatalysis. In this work, we report a one-pot organic ligand-free synthesis of AuNPs on mesoporous carbon (MC). The size of the AuNPs is controlled by the micro- and mesoporosity of the carbon support and the mass ratio employed of the gold precursor/MC. The produced AuNPs-MC hybrid material, with the largest amount of small AuNPs (1-3 nm), shows good catalytic activity for the electrochemical reduction of CO2 to CO in aqueous electrolyte. The optimized selectivity is recorded to be, on average, 80% with a mass activity of 12.8 A g-1 at an overpotential of 550 mV. The catalyst stability of the material is investigated to give insight into the irreversible deactivation mechanism occurring at the surface of AuNPs. Using 6-mercapto-1-hexanol as the ligand on AuNPs shows a dual effect in terms of an improved stability but a lowered activity. © 2018 Elsevier Ltd. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111758
Appears in Collections: 气候减缓与适应
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作者单位: Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center (INANO), Aarhus University, Gustav Wieds Vej 14, Aarhus C, 8000, Denmark; Electrocatalysis and Applied Electrochemistry Group, Department of Chemical Sciences, University of Padova, Via Marzolo 1, Padova, I-35131, Italy; Department of Chemistry, Aarhus University, Langelandsgade 140, Aarhus C, 8000, Denmark
Recommended Citation:
Miola M.,Hu X.-M.,Brandiele R.,et al. Ligand-free gold nanoparticles supported on mesoporous carbon as electrocatalysts for CO2 reduction[J]. Journal of CO2 Utilization,2018-01-01,28