High-selectivity electrochemical CO2 reduction to formate at low overpotential over Bi catalyst with hexagonal sheet structure

2020 ◽  
pp. 148577
Author(s):  
Hao Jiang ◽  
Lizhang Wang ◽  
Yiran Li ◽  
Bai Gao ◽  
Yadan Guo ◽  
...  
Keyword(s):  
High Selectivity ◽  
Co2 Reduction ◽  
Electrochemical Co2 Reduction ◽  
Sheet Structure ◽  
Low Overpotential ◽  
Hexagonal Sheet

Selective and Low Overpotential Electrochemical CO2 Reduction to Formate on CuS Decorated CuO Heterostructure

2019 ◽  
Vol 149 (3) ◽  
pp. 860-869 ◽  
Author(s):  
Amaha Woldu Kahsay ◽  
Kassa Belay Ibrahim ◽  
Meng-Che Tsai ◽  
Mulatu Kassie Birhanu ◽  
Soressa Abera Chala ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Electrochemical Co2 Reduction ◽  
Low Overpotential

Highly dispersed CuFe-nitrogen active sites electrode for synergistic electrochemical CO2 reduction at low overpotential

2020 ◽  
Vol 269 ◽  
pp. 115029
Author(s):  
Fuhuan Wang ◽  
Heping Xie ◽  
Tao Liu ◽  
Yifan Wu ◽  
Bin Chen
Keyword(s):  
Active Sites ◽  
Co2 Reduction ◽  
Electrochemical Co2 Reduction ◽  
Highly Dispersed ◽  
Low Overpotential

Hierarchical Cu pillar electrodes for electrochemical CO2 reduction to formic acid with low overpotential

2016 ◽  
Vol 18 (8) ◽  
pp. 6252-6258 ◽  
Author(s):  
Jaehoon Chung ◽  
Da Hye Won ◽  
Jaekang Koh ◽  
Eun-Hee Kim ◽  
Seong Ihl Woo
Keyword(s):  
Electrochemical Performance ◽  
Formic Acid ◽  
Surface Area ◽  
Co2 Reduction ◽  
Lattice Property ◽  
Cu Pillar ◽  
Electrochemical Co2 Reduction ◽  
Low Overpotential ◽  
Enhanced Electrochemical Performance

Hierarchical Cu pillar electrodes have shown enhanced electrochemical performance for CO2 reduction due to their increased surface area and controlled lattice property.

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.

scholarly journals Electrochemical CO2 reduction to formic acid on crystalline SnO2 nanosphere catalyst with high selectivity and stability

2016 ◽  
Vol 37 (7) ◽  
pp. 1081-1088 ◽  
Author(s):  
Yishu Fu ◽  
Yanan Li ◽  
Xia Zhang ◽  
Yuyu Liu ◽  
Xiaodong Zhou ◽  
...  
Keyword(s):  
Formic Acid ◽  
High Selectivity ◽  
Co2 Reduction ◽  
Electrochemical Co2 Reduction

Electrochemical CO2 reduction by a cobalt bipyricorrole complex: decrease of an overpotential value derived from monoanionic ligand character of the porphyrinoid species

2019 ◽  
Vol 55 (4) ◽  
pp. 493-496 ◽  
Author(s):  
Ayumu Ogawa ◽  
Koji Oohora ◽  
Wenting Gu ◽  
Takashi Hayashi
Keyword(s):  
Co2 Reduction ◽  
Electrochemical Co2 Reduction ◽  
Low Overpotential ◽  
Co Reduction

Bipyricorrole serves as a useful monoanionic ligand in a Co-based catalyst for a selective CO2-to-CO reduction with low overpotential.

Zinc-Modified Copper Catalyst for Efficient (Photo-)Electrochemical CO2 Reduction with High Selectivity of HCOOH Production

2019 ◽  
Vol 123 (18) ◽  
pp. 11555-11563 ◽  
Author(s):  
Saira Ajmal ◽  
Yang Yang ◽  
Kejian Li ◽  
Muhammad Ali Tahir ◽  
Yangyang Liu ◽  
...  
Keyword(s):  
High Selectivity ◽  
Copper Catalyst ◽  
Co2 Reduction ◽  
Electrochemical Co2 Reduction

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.

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