Synthesis of a Nickel Single-Atom Catalyst Based on Ni–N4–xCx Active Sites for Highly Efficient CO2 Reduction Utilizing a Gas Diffusion Electrode

2020 ◽  
Vol 3 (9) ◽  
pp. 8739-8745
Author(s):  
Syed Asad Abbas ◽  
Jun Tae Song ◽  
Ying Chuan Tan ◽  
Ki Min Nam ◽  
Jihun Oh ◽  
...  
Keyword(s):  
Active Sites ◽  
Co2 Reduction ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Single Atom ◽  
Highly Efficient

scholarly journals Investigation of Gas Diffusion Electrode Systems for the Electrochemical CO2 Conversion

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 482
Author(s):  
Hilmar Guzmán ◽  
Federica Zammillo ◽  
Daniela Roldán ◽  
Camilla Galletti ◽  
Nunzio Russo ◽  
...  
Keyword(s):  
Carbon Capture ◽  
Active Sites ◽  
Co2 Reduction ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Catalyst Loading ◽  
Co2 Conversion ◽  
Atmospheric Conditions ◽  
Electrochemical Co2 Reduction ◽  
Liquid Products

Electrochemical CO2 reduction is a promising carbon capture and utilisation technology. Herein, a continuous flow gas diffusion electrode (GDE)-cell configuration has been studied to convert CO2 via electrochemical reduction under atmospheric conditions. To this purpose, Cu-based electrocatalysts immobilised on a porous and conductive GDE have been tested. Many system variables have been evaluated to find the most promising conditions able to lead to increased production of CO2 reduction liquid products, specifically: applied potentials, catalyst loading, Nafion content, KHCO3 electrolyte concentration, and the presence of metal oxides, like ZnO or/and Al2O3. In particular, the CO productivity increased at the lowest Nafion content of 15%, leading to syngas with an H2/CO ratio of ~1. Meanwhile, at the highest Nafion content (45%), C2+ products formation has been increased, and the CO selectivity has been decreased by 80%. The reported results revealed that the liquid crossover through the GDE highly impacts CO2 diffusion to the catalyst active sites, thus reducing the CO2 conversion efficiency. Through mathematical modelling, it has been confirmed that the increase of the local pH, coupled to the electrode-wetting, promotes the formation of bicarbonate species that deactivate the catalysts surface, hindering the mechanisms for the C2+ liquid products generation. These results want to shine the spotlight on kinetics and transport limitations, shifting the focus from catalytic activity of materials to other involved factors.

Atomic regulation of metal-organic framework derived carbon-based single-atom catalysts for electrochemical CO2 reduction reaction

2021 ◽  
Author(s):  
Danni Zhou ◽  
Xinyuan Li ◽  
Huishan Shang ◽  
Fengjuan Qin ◽  
Wenxing Chen
Keyword(s):  
Active Sites ◽  
Metal Organic Framework ◽  
Co2 Reduction ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Single Atom ◽  
Electrochemical Co2 Reduction ◽  
Metal Organic ◽  
Co2 Reduction Reaction ◽  
Organic Framework

Metal-organic framework (MOF) derived single-atom catalysts (SACs), featured unique active sites and adjustable topological structures, exhibit high electrocatalytic performance on carbon dioxide reduction reactions (CO2RR). By modulating elements and atomic...

Highly Efficient Proton-Assisted Photocatalytic CO2 Reduction over 3-Mercaptopropionic Acid-Capped CdS Quantum Dots

2021 ◽  
Author(s):  
Duc-Trung Nguyen ◽  
Anis Chouat ◽  
Trong-On Do
Keyword(s):  
Quantum Dots ◽  
Active Sites ◽  
Co2 Reduction ◽  
Cds Quantum Dots ◽  
Capping Agents ◽  
Mercaptopropionic Acid ◽  
Highly Efficient

Herein, we demonstrate that 3-mercaptopropionate capping agents on CdS quantum dots' surface could serve as proton shutters and localize protons near the active sites toward an efficient photocatalytic CO2 reduction....

scholarly journals General π‐Electron‐Assisted Strategy for Ir, Pt, Ru, Pd, Fe, Ni Single‐Atom Electrocatalysts with Bifunctional Active Sites for Highly Efficient Water Splitting

2019 ◽  
Vol 131 (34) ◽  
pp. 11994-11999 ◽  
Author(s):  
Wei‐Hong Lai ◽  
Li‐Fu Zhang ◽  
Wei‐Bo Hua ◽  
Sylvio Indris ◽  
Zi‐Chao Yan ◽  
...  
Keyword(s):  
Water Splitting ◽  
Active Sites ◽  
Single Atom ◽  
Highly Efficient

Atomic-level active sites of efficient imidazolate framework-derived nickel catalysts for CO2 reduction

2019 ◽  
Vol 7 (46) ◽  
pp. 26231-26237 ◽  
Author(s):  
Fuping Pan ◽  
Hanguang Zhang ◽  
Zhenyu Liu ◽  
David Cullen ◽  
Kexi Liu ◽  
...  
Keyword(s):  
Active Sites ◽  
Co2 Reduction ◽  
Nickel Catalysts ◽  
Atomic Level ◽  
Single Atom ◽  
Dangling Bond

Active sites of single-atom nickel catalysts for CO2 reduction were revealed to be edge-located Ni–N2+2 sites with dangling bond-containing carbon atoms, which facilitate the dissociation of the C–O bond of *COOH intermediate.

Rare-Earth Single-Atom La–N Charge-Transfer Bridge on Carbon Nitride for Highly Efficient and Selective Photocatalytic CO2 Reduction

ACS Nano ◽  
2020 ◽  
Vol 14 (11) ◽  
pp. 15841-15852
Author(s):  
Peng Chen ◽  
Ben Lei ◽  
Xing’an Dong ◽  
Hong Wang ◽  
Jianping Sheng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Charge Transfer ◽  
Carbon Nitride ◽  
Co2 Reduction ◽  
Single Atom ◽  
Highly Efficient

Highly Efficient Low-Pt-Based Electrocatalysts with Pt Single-Atom Active Sites for Oxygen Reduction Reaction

2020 ◽  
Vol MA2020-01 (38) ◽  
pp. 1688-1688
Author(s):  
Jing Liu ◽  
JeongHan Roh ◽  
DongHoon Song ◽  
Junu Bak ◽  
Hyo-Jong Kim ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Sites ◽  
Reduction Reaction ◽  
Single Atom ◽  
Highly Efficient
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