scholarly journals Polyoxometalate-based electron transfer modulation for efficient electrocatalytic carbon dioxide reduction

2020 ◽  
Vol 11 (11) ◽  
pp. 3007-3015 ◽  
Author(s):  
Jing Du ◽  
Zhong-Ling Lang ◽  
Yuan-Yuan Ma ◽  
Hua-Qiao Tan ◽  
Bai-Ling Liu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electron Transfer ◽  
Aqueous Electrolyte ◽  
Carbon Dioxide Reduction ◽  
Highly Efficient

Polyoxometalates as electron regulators to promote the carbonyl manganese (MnL) electrocatalyst for highly efficient CO2 reduction in aqueous electrolyte.

Carbon material-supported Fe7C3@FeO nanoparticles: a highly efficient catalyst for carbon dioxide reduction with 1-butene

2020 ◽  
Vol 5 (11) ◽  
pp. 2101-2108
Author(s):  
Bing Yan ◽  
Luyi Wang ◽  
Bolong Wang ◽  
Quanxin Chen ◽  
Chunjing Liu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Material ◽  
Carbon Dioxide Reduction ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
Highly Dispersed ◽  
Feo Nanoparticles

Highly dispersed Fe7C3@FeO supported on AC was synthesized and demonstrated as an excellent catalyst for carbon dioxide reduction with 1-butene.

Highly efficient multi-metal catalysts for carbon dioxide reduction prepared from atomically sequenced metal organic frameworks

Nano Research ◽  
2020 ◽  
Vol 14 (2) ◽  
pp. 493-500 ◽  
Author(s):  
Celia Castillo-Blas ◽  
Consuelo Álvarez-Galván ◽  
Inés Puente-Orench ◽  
Alba García-Sánchez ◽  
Freddy E. Oropeza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Metal Organic Frameworks ◽  
Carbon Dioxide Reduction ◽  
Metal Catalysts ◽  
Highly Efficient ◽  
Metal Organic

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.

A highly efficient diatomic nickel electrocatalyst for CO2 reduction

2020 ◽  
Vol 56 (62) ◽  
pp. 8798-8801 ◽  
Author(s):  
Meng-Jiao Sun ◽  
Zhi-Wei Gong ◽  
Jun-Dong Yi ◽  
Teng Zhang ◽  
Xiaodong Chen ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Co2 Reduction ◽  
Carbon Dioxide Reduction ◽  
Carbon Composite ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Reduction Activity ◽  
Nitrogen Doped Carbon

Diatomic Ni2 clusters embedded in a nitrogen-doped carbon composite show high electrocatalytic carbon dioxide reduction activity.

Rhenium-modified porous covalent triazine framework for highly efficient photocatalytic carbon dioxide reduction in a solid–gas system

2018 ◽  
Vol 8 (8) ◽  
pp. 2224-2230 ◽  
Author(s):  
Rui Xu ◽  
Xu-Sheng Wang ◽  
Hui Zhao ◽  
Hua Lin ◽  
Yuan-Biao Huang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Efficiency ◽  
Carbon Dioxide Reduction ◽  
Highly Efficient ◽  
System P ◽  
Gas System ◽  
Covalent Triazine Framework

A porous rhenium-modified covalent triazine framework shows high efficiency in photocatalytic CO2 reduction to CO in a solid/gas interface.

The award of medals by the President, Sir George Porter, at the Anniversary Meeting, 30 November 1987

1988 ◽  
Vol 417 (1852) ◽  
pp. 1-5
Keyword(s):  
Carbon Dioxide ◽  
Electron Transfer ◽  
Chemical Analysis ◽  
Water Oxidation ◽  
Carbon Dioxide Reduction ◽  
Electron Transfer Pathway ◽  
Starting Point ◽  
Main Pathway ◽  
Isolated Chloroplasts ◽  
Detailed Chemical

The Copley Medal is awarded to Dr R. Hill, F. R. S., in recognition of his pioneering contributions to the understanding of the nature and mechanism of the main pathway of electron transport in photosynthesis. Almost fifty years ago Hill made the first important discovery that allowed detailed chemical analysis of the pathways of photosynthesis, when he demon­strated the light-driven oxidation of water by isolated chloroplasts, and this made it possible to study water oxidation separately from carbon-dioxide reduction. This was the starting point in the elucidation of the electron-transfer pathway in photosynthesis, and in 1951 Hill, with R. Scarisbrick, uncovered the first com­ponent in the chain when they discovered cytochrome and established its key properties. Subsequently, with H. E. Davenport, Hill discovered the second com­ponent of the chain, shown later by others to be ferredoxin. With F. Bendall he formulated the ‘Z-scheme’ to describe the mechanism of electron transfer in photosynthesis in chloroplasts, which showed the relation between the photochemically driven elements and conventional electron-transfer chains found in other biological systems. This proposal brought great clarity to the field and set the scene for further detailed elucidation of the mechanisms.

Highly efficient water splitting and carbon dioxide reduction into formic acid with iron and copper powder

2015 ◽  
Vol 280 ◽  
pp. 215-221 ◽  
Author(s):  
Heng Zhong ◽  
Ying Gao ◽  
Guodong Yao ◽  
Xu Zeng ◽  
Qiuju Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Formic Acid ◽  
Water Splitting ◽  
Copper Powder ◽  
Carbon Dioxide Reduction ◽  
Highly Efficient

scholarly journals Mechanism of Aqueous Carbon Dioxide Reduction by the Solvated Electron

2020 ◽  
Author(s):  
Vladimir Rybkin
Keyword(s):  
Carbon Dioxide ◽  
Electron Transfer ◽  
Plasma Chemistry ◽  
Reorganization Energy ◽  
Carbon Dioxide Reduction ◽  
Solvated Electron ◽  
Intermediate Transformation ◽  
Proton Coupled Electron Transfer ◽  
Key Species ◽  
Proton Migration

Aqueous solvated electron, e<sub>aq</sub>, a key species in radiation and plasma chemistry, can effciently reduce CO<sub>2</sub> in a potential green chemistry application. Here, the mechanism of this reaction is unravelled by condensed-phase Born-Oppenheimer molecular dynamics based on the correlated wave function and accurate DFT approximation. We introduce and apply the holistic protocol for solvated electron's reactions encompassing all relevant reaction stages starting from diffusion. The carbon dioxide reduction proceeds via a cavity intermediate, which is separated from the product, CO2<sup>-</sup>, by an energy barrier due to the bending of CO<sub>2</sub> and the corresponding solvent reorganization energy. The formation of the intermediate is caused by solvated electron's diffusion, whereas the intermediate transformation to CO<sub>2</sub><sup>-</sup> is triggered by solvent fluctuations. This picture of activation-controlled e<sub>aq</sub> reaction is very different from both rapid barrierless electron transfer, and proton-coupled electron transfer, where key transformations are caused by proton migration.

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