Confined cavity on a mass-producible wrinkle film promotes selective CO2 reduction

2020 ◽  
Vol 8 (29) ◽  
pp. 14592-14599
Author(s):  
Kyeong Min Cho ◽  
Woo-Bin Jung ◽  
Donggyu Kim ◽  
Ju Ye Kim ◽  
Yesol Kim ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Co2 Reduction ◽  
Selective Reduction ◽  
Made In

Selective reduction of CO2 to carbon monoxide is achieved by Au wrinkle film which can be made in simple and mass-producible process.

scholarly journals Selective reduction and homologation of carbon monoxide by organometallic iron complexes

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Helen R. Sharpe ◽  
Ana M. Geer ◽  
Laurence J. Taylor ◽  
Benjamin M. Gridley ◽  
Toby J. Blundell ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Selective Reduction ◽  
Iron Complexes

Ni pincer complex catalytic hydroboration of CO2: a DFT study on the influence of borane reductants on the selective reduction

2021 ◽  
Author(s):  
Nana Ma ◽  
Qingli Xu ◽  
Chenhao Tu ◽  
Wenyue Guo ◽  
Guisheng Zhang
Keyword(s):  
Co2 Reduction ◽  
Selective Reduction ◽  
Dft Study ◽  
Pincer Complex

It has been reported that either the boryl formate (HCOOBR2), bis(boryl)acetal (R2BOCH2OBR2), or methoxy borane (R2BOCH3) product of CO2 reduction is selectively afforded adopting the Nickel (Ni) pincer catalyst by...

First-Principles DFT Insights into the Mechanisms of CO2 Reduction to CO on Fe (100)-Ni Bimetals

2021 ◽  
Author(s):  
Caroline Kwawu ◽  
Albert Aniagyei ◽  
Destiny Konadu ◽  
Elliot Menkah ◽  
Richard Tia
Keyword(s):  
Carbon Monoxide ◽  
Binding Site ◽  
Active Sites ◽  
Density Functional ◽  
Co2 Reduction ◽  
Density Functional Theory Calculations ◽  
Hydrocarbon Fuel ◽  
Generalized Gradient ◽  
Efficient Catalyst ◽  
Stepped Surface

Abstract Iron and nickel are known active sites in the enzyme carbon monoxide dehydrogenases (CODH) which catalyzes CO2 to CO reversibly. The presence of nickel impurities in the earth abundant iron surface could provide a more efficient catalyst for CO2 degradation into CO, which is a feedstock for hydrocarbon fuel production. In the present study, we have employed spin-polarized dispersion-corrected density functional theory calculations within the generalized gradient approximation to elucidate the active sites on Fe (100)-Ni bimetals. We sort to ascertain the mechanism of CO2 dissociation to carbon monoxide on Ni deposited and alloyed surfaces at 0.25, 0.50 and 1 monolayer (ML) impurity concentrations. CO2 and (CO + O) bind exothermically i.e., -0.87 eV and − 1.51 eV respectively to the bare Fe (100) surface with a decomposition barrier of 0.53 eV. The presence of nickel generally lowers the amount of charge transferred to CO2 moiety. Generally, the binding strengths of CO2 were reduced on the modified surfaces and the extent of its activation was lowered. The barriers for CO2 dissociation increased mainly upon introduction of Ni impurities which is undesired. However, the 0.5 ML deposited (FeNi0.5(A)) surface is promising for CO2 decomposition, providing a lower energy barrier (of 0.32 eV) than the pristine Fe (100) surface. This active 1-dimensional defective FeNi0.5(A) surface provides a stepped surface and Ni-Ni bridge binding site for CO2 on Fe (100). Ni-Ni bridge site on Fe (100) is more effective for both CO2 binding or sequestration and dissociation compared to the stepped surface providing the Fe-Ni bridge binding site.

Bioconversion of Carbon Monoxide to Formate Using Artificially Designed Carbon Monoxide:Formate Oxidoreductase in Hyperthermophilic Archaea

2021 ◽  
Author(s):  
Jae Kyu Lim ◽  
Ji-In Yang ◽  
Yun Jae Kim ◽  
Yeong-Jun Park ◽  
Yong Hwan Kim
Keyword(s):  
Carbon Monoxide ◽  
Electron Transfer ◽  
Fusion Protein ◽  
Direct Electron Transfer ◽  
Co2 Reduction ◽  
Hyperthermophilic Archaea ◽  
Production Activity ◽  
Formate Production

Abstract Ferredoxin-dependent metabolic engineering of electron transfer circuits has been developed to enhance redox efficiency in the field of synthetic biology, e.g., for hydrogen production and for reduction of flavoproteins or NAD(P)+. Here, we present the bioconversion of carbon monoxide (CO) gas to formate via a synthetic CO:formate oxidoreductase (CFOR), designed as an enzyme complex for direct electron transfer between noninteracting CO dehydrogenase and formate dehydrogenase using an electron-transferring Fe-S fusion protein. The CFOR-introduced Thermococcus onnurineus mutant strains showed CO-dependent formate production in vivo and in vitro. The formate production rate from purified CFOR complex and specific formate productivity from the bioreactor were 348 ± 34 μmol/mg/min and 90.2 ± 20.4 mmol/g-cells/h, respectively. The CO-dependent CO2 reduction/formate production activity of synthetic CFOR was confirmed, indicating that direct electron transfer between two unrelated dehydrogenases was feasible via mediation of the FeS-FeS fusion protein.

scholarly journals Selective Reduction of α,β-Unsaturated Carbonyl Compounds with Carbon Monoxide and Water Assisted by Selenium

1989 ◽  
Vol 62 (5) ◽  
pp. 1682-1684 ◽  
Author(s):  
Yutaka Nishiyama ◽  
Yasuhiko Makino ◽  
Sawako Hamanaka ◽  
Akiya Ogawa ◽  
Noboru Sonoda
Keyword(s):  
Carbon Monoxide ◽  
Carbonyl Compounds ◽  
Selective Reduction
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