Effect of anion in diluted imidazolium-based ionic liquid/buffer electrolytes for CO2 electroreduction on copper

被引：24

作者：

Golru, Samaneh Sharifi ^{[1
,2
]}

Biddinger, Elizabeth J. ^{[1
,2
]}

机构：

[1] CUNY City Coll, Dept Chem Engn, New York, NY 10031 USA

[2] CUNY, Grad Ctr, PhD Program Chem, New York, NY 10016 USA

来源：

ELECTROCHIMICA ACTA | 2020年 / 361卷

基金：

美国国家科学基金会;

关键词：

CO2; reduction; Cu electrodes; Ionic liquids; Electrocatalysis; CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; ELECTROCATALYTIC REDUCTION; MECHANISTIC INSIGHTS; PHYSICAL-PROPERTIES; EVOLUTION REACTION; LIQUID INTERFACE; SOLUBILITY; WATER; ADSORPTION;

D O I：

10.1016/j.electacta.2020.136787

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A series of ILs containing the same cation (1-butyl-3-methylimidazolium ([BMIM](+)) but different anions (bis(trifluoromethylsulfonyl)imide ([NTF2](-)), triflate ([OTF](-)), acetate ([Ac](-)), chloride ([Cl](-)), and dicyanamide ([DCA](-))) were used to study the effect of anion in diluted imidazolium-based ionic liquid/buffer electrolytes on product selectivity and activity of copper electrodes in CO2 electroreduction. The onset potential shifted to more positive potentials by adding ILs to the CO2-saturated electrolytes. Faradaic efficiency (FE%) of formate for all ILs (except for [BMIM][DCAD increased compared to the electrolyte without any IL at all potentials. The maximum FEformate (38.7%) was observed for [BMIM][NTF2] at -0.92V. [BMIM][DCA] had the highest FE% for hydrogen and the lowest FE% for hydrocarbons. By using X-ray photoelectron spectroscopy, the maximum amount of IL adsorbed on the surface was obtained for [BMIM][DCA] which had the highest hydrophilicity and lowest CO2 affinity. These results underscore the importance of anions when using ILs for CO2 electroreduction. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：8

共 66 条

[1] High-pressure phase behavior of carbon dioxide with imidazolium-based ionic liquids [J].

Aki, SNVK ;

Mellein, BR ;

Saurer, EM ;

Brennecke, JF .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (52) :20355-20365

[2]

[Anonymous], 2010, Basics of Electrochemical Impedance Spectroscopy

[3]

Anthony JL, 2005, J PHYS CHEM B, V109, P6366, DOI [10.1021/jp046404l, 10.1021/jp0464041]

[4] Adsorption of ionic liquids onto silver studied by XPS [J].

Beattie, David A. ;

Arcifa, Andrea ;

Delcheva, Iliana ;

Le Cerf, Brock A. ;

MacWilliams, Stephanie, V ;

Rossi, Antonella ;

Krasowska, Marta .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2018, 544 :78-85

[5] CO2 electroreduction on copper- cobalt nanoparticles: Size and composition effect [J].

Bernal, M. ;

Bagger, A. ;

Scholten, F. ;

Sinev, I. ;

Bergmann, A. ;

Ahmadi, M. ;

Rossmeisl, J. ;

Roldan Cuenya, Beatriz .

NANO ENERGY, 2018, 53 :27-36

[6] CO2 in 1-Butyl-3-methylimidazolium Acetate. 2. NMR Investigation of Chemical Reactions [J].

Besnard, Marcel ;

Isabel Cabaco, M. ;

Chavez, Fabian Vaca ;

Pinaud, Noel ;

Sebastiao, Pedro J. ;

Coutinho, Joao A. P. ;

Mascetti, Joelle ;

Danten, Yann .

JOURNAL OF PHYSICAL CHEMISTRY A, 2012, 116 (20) :4890-4901

[7] Probing anion-carbon dioxide interactions in room temperature ionic liquids: Gas phase cluster calculations [J].

Bhargava, B. L. ;

Balasubramanian, S. .

CHEMICAL PHYSICS LETTERS, 2007, 444 (4-6) :242-246

[8] Electrocatalytic reduction of carbon dioxide on indium coated gas diffusion electrodes-Comparison with indium foil [J].

Bitar, Ziad ;

Fecant, Antoine ;

Trela-Baudot, Emmanuelle ;

Chardon-Noblat, Sylvie ;

Pasquier, David .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2016, 189 :172-180

[9]

Cammarata L, 2001, PHYS CHEM CHEM PHYS, V3, P5192, DOI 10.1039/b106900d

[10] Mechanistic Insights for Low-Overpotential Electroreduction of CO2 to CO on Copper Nanowires [J].

Cao, Liang ;

Raciti, David ;

Li, Chenyang ;

Livi, Kenneth J. T. ;

Rottmann, Paul F. ;

Hemker, Kevin J. ;

Mueller, Tim ;

Wang, Chao .

ACS CATALYSIS, 2017, 7 (12) :8578-8587

← 1 2 3 4 5 6 7 →