scholarly journals Core-Shell ZnO@Cu2O as Catalyst to Enhance the Electrochemical Reduction of Carbon Dioxide to C2 Products

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 535
Author(s):  
Shuaikang Zhu ◽  
Xiaona Ren ◽  
Xiaoxue Li ◽  
Xiaopo Niu ◽  
Miao Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Current Density ◽  
High Selectivity ◽  
Co2 Reduction ◽  
Flow Cell ◽  
Core Shell ◽  
Electrochemical Co2 Reduction ◽  
Total Current Density ◽  
Core Shell Structure ◽  
Copper Based Catalyst

The copper-based catalyst is considered to be the only catalyst for electrochemical carbon dioxide reduction to produce a variety of hydrocarbons, but its low selectivity and low current density to C2 products restrict its development. Herein, a core-shell xZnO@yCu2O catalysts for electrochemical CO2 reduction was fabricated via a two-step route. The high selectivity of C2 products of 49.8% on ZnO@4Cu2O (ethylene 33.5%, ethanol 16.3%) with an excellent total current density of 140.1 mA cm−2 was achieved over this core-shell structure catalyst in a flow cell, in which the C2 selectivity was twice that of Cu2O. The high electrochemical activity for ECR to C2 products was attributed to the synergetic effects of the ZnO core and Cu2O shell, which not only enhanced the selectivity of the coordinating electron, improved the HER overpotential, and fastened the electron transfer, but also promoted the multielectron involved kinetics for ethylene and ethanol production. This work provides some new insights into the design of highly efficient Cu-based electrocatalysts for enhancing the selectivity of electrochemical CO2 reduction to produce high-value C2 products.

An overview of flow cell architectures design and optimization for electrochemical CO2 reduction

2021 ◽  
Author(s):  
Dui Ma ◽  
Ting Jin ◽  
Keyu Xie ◽  
Haitao Huang
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Electrochemical Reduction ◽  
Atmospheric Carbon Dioxide ◽  
Co2 Reduction ◽  
Value Added ◽  
Flow Cell ◽  
Design And Optimization ◽  
Electrochemical Co2 Reduction ◽  
Carbon Dioxide Levels

Converting CO2 into value-added fuels or chemical feedstocks through electrochemical reduction is one of the several promising avenues to reduce atmospheric carbon dioxide levels and alleviate global warming. This approach...

Ce-doped Bi based catalysts for highly efficient electroreduction of CO2 to formate

2021 ◽  
Author(s):  
De-Huang Zhuo ◽  
Qing-Song Chen ◽  
Xiu-Hui Zhao ◽  
Yin-Long Jiang ◽  
Jian Lu ◽  
...  
Keyword(s):  
Shell Structure ◽  
Metal Organic Frameworks ◽  
Co2 Reduction ◽  
Core Shell ◽  
Excellent Performance ◽  
Highly Efficient ◽  
Electrochemical Co2 Reduction ◽  
Metal Organic ◽  
Core Shell Structure ◽  
Novel Catalyst

Ce-Bi@CeBiOx/C with core-shell structure has been synthesized by pyrolysis of cerium doped bismuth-based metal-organic frameworks. This novel catalyst exhibits excellent performance for electrochemical CO2 reduction to formate with a maximum...

scholarly journals Positional effects of second-sphere amide pendants on electrochemical CO2 reduction catalyzed by iron porphyrins

2018 ◽  
Vol 9 (11) ◽  
pp. 2952-2960 ◽  
Author(s):  
Eva M. Nichols ◽  
Jeffrey S. Derrick ◽  
Sepand K. Nistanaki ◽  
Peter T. Smith ◽  
Christopher J. Chang
Keyword(s):  
Carbon Dioxide ◽  
Greenhouse Gas ◽  
Electrochemical Reduction ◽  
Energy Input ◽  
Sustainable Energy ◽  
Co2 Reduction ◽  
Value Added ◽  
Iron Porphyrins ◽  
Electrochemical Co2 Reduction ◽  
Positional Effects

The development of catalysts for electrochemical reduction of carbon dioxide offers an attractive approach to transforming this greenhouse gas into value-added carbon products with sustainable energy input.

scholarly journals Multielectron transportation of polyoxometalate-grafted metalloporphyrin coordination frameworks for selective CO2-to-CH4 photoconversion

2019 ◽  
Author(s):  
Qing Huang ◽  
Jiang Liu ◽  
Liang Feng ◽  
Qi Wang ◽  
Wei Guan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Selectivity ◽  
Energy Resource ◽  
Co2 Reduction ◽  
Reduction Process ◽  
Hydrocarbon Fuel ◽  
Energy Carriers ◽  
Reducing Ability ◽  
Selective Generation ◽  
Coordination Frameworks

Abstract Photocatalytic CO2 reduction into energy carriers is of utmost importance due to the rising concentrations of carbon dioxide and the depleting energy resource. However, the highly selective generation of desirable hydrocarbon fuel, such as methane (CH4), from CO2 remains extremely challenging. Herein, we present two stable polyoxometalate-grafted metalloporphyrin coordination frameworks (POMCFs), which are constructed with reductive Zn-ε-Keggin clusters and photosensitive TCPP linkers, exhibiting high selectivity (> 96%) for CH4 formation in photocatalytic CO2 reduction system. To our knowledge, the high CH4 selectivity of POMCFs has surpassed all of the reported coordiantion framework-based heterogeneous photocatalysts for CO2-to-CH4 conversion. Significantly, the introduction of Zn-ε-keggin cluster with strong reducing ability is the important origin for POMCFs to obtain high photocatalytic selectivity for CH4 formation, considering that eight MoV atoms can theoretically donate eight electrons to fulfill the multi-electrons reduction process of CO2 to CH4 transformation.

scholarly journals Turning manganese into gold: Efficient electrochemical CO2 reduction by a fac-Mn(apbpy)(CO)3Br complex in a gas–liquid interface flow cell

2021 ◽  
Vol 416 ◽  
pp. 129050
Author(s):  
Jonathan Filippi ◽  
Laura Rotundo ◽  
Roberto Gobetto ◽  
Hamish A. Miller ◽  
Carlo Nervi ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Flow Cell ◽  
Liquid Interface ◽  
Electrochemical Co2 Reduction

Electrochemical CO2 reduction with low overpotential by a poly(4-vinylpyridine) electrode for application to artificial photosynthesis

2017 ◽  
Vol 198 ◽  
pp. 409-418 ◽  
Author(s):  
Hohyun Jeong ◽  
Myung Jong Kang ◽  
Hyeyeong Jung ◽  
Young Soo Kang
Keyword(s):  
Charge Transfer ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Catalytic Properties ◽  
Co2 Reduction ◽  
Surface Concentration ◽  
Reduction Reaction ◽  
Pt Electrodes ◽  
Electrochemical Co2 Reduction ◽  
Low Overpotential

Pyridine molecules have been used as a catalyst to reduce the activation energy of the CO2 reduction reaction. It has been reported that CO2 is reduced by pyridine catalysts at low overpotential around −0.58 V vs. SCE. Poly(4-vinylpyridine), which has pyridine functional groups shows similar catalytic properties to reduce CO2 at low overpotential like pyridinium catalysts. Different thickness of P(4-VP) coated Pt electrodes were analyzed to determine the catalytic properties for CO2 reduction. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy methods showed the catalytic CO2 reduction properties of a P(4-VP)/Pt electrode. Thin P(4-VP)/Pt film showed a low current density of −0.16 mA cm−2 under CO2 atmosphere and the current density reached −0.45 mA cm−2 with increase of the P(4-VP) thickness. The increase of current density was explained by an increased surface concentration of adsorbed pyridinium groups of the thick P(4-VP) layer. Nyquist plots also showed decrease of impedance with increase of the P(4-VP) layer indicating fast charge transfer between Pt and the P(4-VP) layer due to the increase of hybrid ionic complex formation on the Pt surface. However, charge transfer is restricted when the P(4-VP) layer becomes more thick because of slowed protonation of pyridine groups adjacent to the Pt surface due to the suppressed permeability of electrolyte solution into the PVP membrane. This electrochemical observation provides a new aspect of P(4-VP) polymer for CO2 reduction.

(Invited) A Full Carbon Balance Analysis on High Current Density Electrochemical CO2 Reduction Reactors with Cu Catalysts

2020 ◽  
Vol MA2020-01 (36) ◽  
pp. 1497-1497
Author(s):  
Brian Seger ◽  
Ming Ma ◽  
Ezra L Clark ◽  
Kasper Therkildsen ◽  
Ib Chorkendorff
Keyword(s):  
Current Density ◽  
Carbon Balance ◽  
High Current Density ◽  
Co2 Reduction ◽  
High Current ◽  
Electrochemical Co2 Reduction ◽  
Balance Analysis ◽  
Cu Catalysts
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