Effect of partial pressure on product selectivity in Cu-catalyzed electrochemical reduction of CO2
Literature Information
Mozhgan Moradzaman, Carlos Sánchez Martínez, Guido Mul
The influence of CO2 partial pressure on electrochemical reduction of CO2 using oxide-derived electrodeposited copper surfaces in a conventional two compartment cell configuration, is discussed. Contrary to what has been reported in the literature for polished copper surfaces, demonstrating a linear decrease in the faradaic efficiency (FE) as a function of decreasing partial pressure, the (FE) and partial current density of both ethylene and methane are improved when the CO2 partial pressure is decreased below 1 atm, and an optimized ethylene efficiency of ∼45% is achieved in the range of ∼0.4–∼0.6 atm at −1.1 V vs. RHE. Such optimum in ethylene FE, ranging from ∼10–45%, is obtained at a variety of applied voltages (−0.7 to −1.1 V vs. RHE), but only at relatively low concentrations of KHCO3 of less than 0.25 M. Since a low KHCO3 concentration induces only a low buffer capacity, we conclude that a rise of local pH induced by a decreased CO2 partial pressure explains improved selectivity towards ethylene. If the CO2 partial pressure decreases below ∼0.4 atm, not only the availability of CO2 limits ethylene selectivity, but also a fall in local pH, associated with the decreasing partial current density in formation of ethylene. Calculations of local concentrations of CO2 and the pH corroborate these hypotheses. These findings contribute to, and substantiate the current understanding of the significant role of local pH conditions on the selectivity of CO2 electroreduction products, and suggest high ethylene selectivity over oxide derived Cu electrodes can be obtained for diluted CO2 feed compositions if the electrolyte has a relatively low buffer capacity.
Related Literature
A novel and facile strategy to inhibit corrosion: thiol-click synthesis of polythiols and their skinning on a metal surface to form super thick protective films
Lingxiao Gu, Qingquan Xue, Shusen Peng, Gang Wang, Jin Han, Xuedong Wu
DOI: 10.1039/C5PY01517K
Silica/polymer microspheres and hollow polymer microspheres as scaffolds for nitric oxide release in PBS buffer and bovine serum
Tuanwei Liu, Dongwei Zhang, Xinlin Yang, Chenxi Li
DOI: 10.1039/C4PY01326C
Thermoresponsive polyelectrolytes derived from ionic liquids
Yongjun Men, Jiayin Yuan
DOI: 10.1039/C4PY01665C
A well-defined nitro-functionalized aromatic framework (NO2-PAF-1) with high CO2 adsorption: synthesis via the copper-mediated Ullmann homo-coupling polymerization of a nitro-containing monomer
Ze-Huan Hei, Mu-Hua Huang, Yunjun Luo, Yingxiong Wang
DOI: 10.1039/C5PY01682G
Facile synthesis of cyclosiloxane-based polymers for hybrid film formation
Ali Demirci, Shunsuke Yamamoto, Jun Matsui, Tokuji Miyashita, Masaya Mitsuishi
DOI: 10.1039/C5PY00018A
Ultrathin free-standing polymer membranes with chemically responsive luminescence via consecutive photopolymerizations
Jiming Yang, Ning Zhang, Qiliao Wang, Yongjiu Liang, Dewen Dong
DOI: 10.1039/C5PY02013A
Synthesis and AIE properties of PEG–PLA–PMPC based triblock amphiphilic biodegradable polymers
Xinli Liu, Yubin Huang, Dongmei Cui
DOI: 10.1039/C5PY01849H
Synthesis and in-depth characterization of reactive, uniform, crosslinked microparticles based on free radical copolymerization of 4-vinylbenzyl azide
Marco Albuszis, Peter J. Roth, Franziska Exnowitz, Doris Locsin Wong, Werner Pauer, Hans-Ulrich Moritz
DOI: 10.1039/C5PY01848J
Templated polymerizations on solid supports mediated by complementary nucleoside interactions
Margarita Garcia, Kristian Kempe, David M. Haddleton, Afzal Khan, Andrew Marsh
DOI: 10.1039/C4PY01783H
You might also like
Is 2-(2-chloroacetamido)-3-phenylpropanoic acid (CAS: 7765-11-9) safe?
2-(2-Chloroacetamido)-3-phenylpropanoic acid (CAS: 7765-11-9) is generally consi...
Is 2-(Benzyloxy)-5-bromobenzoic acid (CAS: 62176-31-2) safe?
2-(Benzyloxy)-5-bromobenzoic acid can be handled safely if appropriate precautio...
What is (4-Methyl-1,2,5-oxadiazol-3-yl)methanamine hydrochloride (CAS: 1159825-48-5)?
(4-Methyl-1,2,5-oxadiazol-3-yl)methanamine hydrochloride is a chemical compound ...
What is 2-(5-Hexylthiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS: 917985-54-7)?
2-(5-Hexylthiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS: 917985-54...
Are there alternatives to 4-(8-Methyl-9H-1,3-dioxolo[4,5-h][2,3]benzodiazepin-5-yl)benzenamine (CAS: 102771-26-6) in synthesis?
While 4-(8-Methyl-9H-1,3-dioxolo[4,5-h][2,3]benzodiazepin-5-yl)benzenamine (CAS:...
What is the market or research trend for tert-butyl 3-hydroxy-4,5,7,8-tetrahydro-2H-pyrazolo[3,4-d]azepine-6-carboxylate (CAS: 851376-80-2)?
The market for tert-butyl 3-hydroxy-4,5,7,8-tetrahydro-2H-pyrazolo[3,4-d]azepine...
How should waste containing 3,5-Diamino-1H-pyrazole-4-carbonitrile (CAS: 6844-58-2) be handled?
Waste containing 3,5-Diamino-1H-pyrazole-4-carbonitrile (CAS: 6844-58-2) should ...
How is (6-Fluoro-3-pyridinyl)boronic acid (CAS: 351019-18-6) typically synthesized?
(6-Fluoro-3-pyridinyl)boronic acid can be synthesized through the reaction of 6-...
What industries use Dibenzyl carbonimidoylbiscarbamate (CAS: 10065-79-9)?
Dibenzyl carbonimidoylbiscarbamate (CAS: 10065-79-9) finds applications in vario...
What is the market or research trend for (beta,beta,2,3,4,5,6-~2~H_7_)Phenylalanine (CAS: 74228-83-4)?
The market for (beta,beta,2,3,4,5,6-~2~H_7_)Phenylalanine (CAS: 74228-83-4) is g...











![(4-Methyl-1H-benzo[d]imidazol-2-yl)methanamine structure (4-Methyl-1H-benzo[d]imidazol-2-yl)methanamine structure](https://static.chemtradehub.com/structs/933/933756-31-1-7b0b.webp)
![N-[2,6-Di(9-anthryl)-4-oxido-8,9,10,11,12,13,14,15-octahydrodinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-yl]-1,1,1-trifluoromethanesulfonamide structure N-[2,6-Di(9-anthryl)-4-oxido-8,9,10,11,12,13,14,15-octahydrodinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-yl]-1,1,1-trifluoromethanesulfonamide structure](https://static.chemtradehub.com/structs/122/1227374-64-2-cdb5.webp)


