In Situ Characterization for Boosting Electrocatalytic Carbon Dioxide Reduction

Small Methods ◽  
2021 ◽  
pp. 2100700
Author(s):  
Xueying Cao ◽  
Dongxing Tan ◽  
Bari Wulan ◽  
K.S. Hui ◽  
K.N. Hui ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Reduction ◽  
In Situ Characterization

In-situ growth of Cu2O with honeycomb structure on roughed graphite paper for efficient electroreduction of CO2 to C2H4

2021 ◽  
Author(s):  
Zuoyu Yan ◽  
Xiuxiu Wang ◽  
Yang Tan ◽  
Aihua Liu ◽  
Fenqiang Luo ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Cuprous Oxide ◽  
Carbon Dioxide Reduction ◽  
Honeycomb Structure ◽  
Reduction Reaction ◽  
In Situ Growth

Metals and their alloys based electrocatalysts continue to attract great attention for electrochemical carbon dioxide reduction reaction (CO2RR). Herein, cuprous oxide (Cu2O) supported on N-doped flexible roughed graphite paper (NGP)...

scholarly journals On the Mechanism of Carbon Dioxide Reduction on Sn-Based Electrodes: Insights into the Role of Oxide Surfaces

Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 636 ◽  
Author(s):  
Giane B. Damas ◽  
Caetano R. Miranda ◽  
Ricardo Sgarbi ◽  
James M. Portela ◽  
Mariana R. Camilo ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electron Transfer ◽  
Formic Acid ◽  
Oxide Layer ◽  
Co2 Reduction ◽  
Carbon Dioxide Reduction ◽  
Oxide Surfaces ◽  
In Situ Conditions

The electrochemical reduction of carbon dioxide into carbon monoxide, hydrocarbons and formic acid has offered an interesting alternative for a sustainable energy scenario. In this context, Sn-based electrodes have attracted a great deal of attention because they present low price and toxicity, as well as high faradaic efficiency (FE) for formic acid (or formate) production at relatively low overpotentials. In this work, we investigate the role of tin oxide surfaces on Sn-based electrodes for carbon dioxide reduction into formate by means of experimental and theoretical methods. Cyclic voltammetry measurements of Sn-based electrodes, with different initial degree of oxidation, result in similar onset potentials for the CO2 reduction to formate, ca. −0.8 to −0.9 V vs. reversible hydrogen electrode (RHE), with faradaic efficiencies of about 90–92% at −1.25 V (vs. RHE). These results indicate that under in-situ conditions, the electrode surfaces might converge to very similar structures, with partially reduced or metastable Sn oxides, which serve as active sites for the CO2 reduction. The high faradaic efficiencies of the Sn electrodes brought by the etching/air exposition procedure is ascribed to the formation of a Sn oxide layer with optimized thickness, which is persistent under in situ conditions. Such oxide layer enables the CO2 “activation”, also favoring the electron transfer during the CO2 reduction reaction due to its better electric conductivity. In order to elucidate the reaction mechanism, we have performed density functional theory calculations on different slab models starting from the bulk SnO and Sn6O4(OH)4 compounds with focus on the formation of -OH groups at the water-oxide interface. We have found that the insertion of CO2 into the Sn-OH bond is thermodynamically favorable, leading to the stabilization of the tin-carbonate species, which is subsequently reduced to produce formic acid through a proton-coupled electron transfer process. The calculated potential for CO2 reduction (E = −1.09 V vs. RHE) displays good agreement with the experimental findings and, therefore, support the CO2 insertion onto Sn-oxide as a plausible mechanism for the CO2 reduction in the potential domain where metastable oxides are still present on the Sn surface. These results not only rationalize a number of literature divergent reports but also provide a guideline for the design of efficient CO2 reduction electrocatalysts.

Carbon dioxide reduction to multicarbon hydrocarbons and oxygenates on plant moss-derived, metal-free, in situ nitrogen-doped biochar

2020 ◽  
Vol 739 ◽  
pp. 140340
Author(s):  
Haoran Yuan ◽  
Xin Qian ◽  
Bo Luo ◽  
Lufeng Wang ◽  
Lifang Deng ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Reduction ◽  
Nitrogen Doped ◽  
Metal Free

Efficient High Rate Carbon Dioxide Reduction to Methane and Ethylene at in situ Electrodeposited Copper Electrode

1987 ◽  
Vol 134 (9) ◽  
pp. 2375-2376 ◽  
Author(s):  
Ronald L. Cook ◽  
Robert C. MacDuff ◽  
Anthony F. Sammells
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Reduction ◽  
Copper Electrode ◽  
High Rate

In situ study of the low overpotential “dimer pathway” for electrocatalytic carbon dioxide reduction by manganese carbonyl complexes

2019 ◽  
Vol 21 (14) ◽  
pp. 7389-7397 ◽  
Author(s):  
Gaia Neri ◽  
Paul M. Donaldson ◽  
Alexander J. Cowan
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Reduction ◽  
Carbonyl Complexes ◽  
In Situ Study ◽  
Low Overpotential ◽  
Manganese Carbonyl ◽  
Lower Overpotential

In situ VSFG spectroscopy was used to probe the mechanism of the lower overpotential “dimer pathway” for the CO2 reduction by [Mn(bpy)(CO)3]Br.

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