scholarly journals Operando Synthesis of High-Curvature Copper Thin Films for CO2 Electroreduction

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 602
Author(s):  
Xin Zhao ◽  
Minshu Du ◽  
Feng Liu
Keyword(s):  
Flow Rate ◽  
Co2 Reduction ◽  
Product Distribution ◽  
Reconstruction Process ◽  
Time Activity ◽  
Reduction Activity ◽  
Electrochemical Co2 Reduction ◽  
Co2 Electroreduction ◽  
Co2 Flow ◽  
Surface Morphology Modification

As the sole metal that could reduce CO2 to substantial amounts of hydrocarbons, Cu plays an important role in electrochemical CO2 reduction, despite its low energy efficiency. Surface morphology modification is an effective method to improve its reaction activity and selectivity. Different from the pretreated modification method, in which the catalysts self-reconstruction process was ignored, we present operando synthesis by simultaneous electro-dissolution and electro-redeposition of copper during the CO2 electroreduction process. Through controlling the cathodic potential and CO2 flow rate, various high-curvature morphologies including microclusters, microspheres, nanoneedles, and nanowhiskers have been obtained, for which the real-time activity and product distribution is analyzed. The best CO2 electro-reduction activity and favored C2H4 generation activity, with around 10% faradic efficiency, can be realized through extensively distributed copper nanowhiskers synthesized under 40 mL/min flow rate and −2.1 V potential.

Understanding the role of axial O in CO2 electroreduction on NiN4 single-atom catalysts via simulations in realistic electrochemical environment

2021 ◽  
Author(s):  
Xu Hu ◽  
Sai Yao ◽  
Letian Chen ◽  
Xu Zhang ◽  
Menggai Jiao ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Heterogeneous Catalysis ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Single Atom ◽  
Electrochemical Co2 Reduction ◽  
Co2 Electroreduction ◽  
Important Approach ◽  
Co2 Reduction Reaction

Electrochemical CO2 reduction reaction (CO2RR) is a very important approach to realize sustainable development. Single-atom catalysts show advantages in both homogeneous and heterogeneous catalysis, and considerable progress has been made...

scholarly journals Concerted Cation–Electron Transfer Mechanism for CO2 Electroreduction

2021 ◽  
Author(s):  
Seung-Jae Shin ◽  
Hansol Choi ◽  
Stefan Ringe ◽  
Da Hye Won ◽  
Chang Hyuck Choi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Interface Design ◽  
High Performance ◽  
Alkali Metal Cation ◽  
Effective Means ◽  
Co2 Reduction ◽  
Multiscale Simulation ◽  
Electron Transfer Mechanism ◽  
Electrochemical Co2 Reduction ◽  
Co2 Electroreduction

Converting carbon dioxide (CO2) into valuable products is one of the most important processes for a sustainable society. Especially, the electrochemical CO2 reduction reaction (CO2RR) offers an effective means, but its reaction mechanism is not yet fully understood. Here, we demonstrate that concerted cation–electron transfer (CCET) is a key catalytic step in the CO2RR to carbon monoxide. The first-principles-based multiscale simulation identifies a single cation that coordinates a CO2− intermediate adsorbed on Ag electrode. The CCET is experimentally verified by a collapse of the CO2RR polarization curves upon correcting for the thermodynamic activity of the cation. As further confirmation, a kinetic study shows that the CO2RR obeys first-order kinetics on the local cation concentration at the electric double layer (estimated by measuring the electrode surface charge). Finally, this work unveils the fundamental origin of different CO2RR activity depending on the species of alkali metal cation, and further highlights the importance of ion-pairing tendency of the cations for electrochemical interface design to achieve high-performance CO2 electrolysis.

Effect of Surface Reforming via O3 Treatment on the Electrochemical CO2 Reduction Activity of a Ag Cathode

2020 ◽  
Vol 3 (7) ◽  
pp. 6552-6560
Author(s):  
Masaatsu Ishida ◽  
Soichi Kikkawa ◽  
Kazutaka Hori ◽  
Kentaro Teramura ◽  
Hiroyuki Asakura ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Reduction Activity ◽  
Electrochemical Co2 Reduction ◽  
Effect Of Surface

Gram-scale Synthesis of Single-Atom Metal-N-CNT Catalysts for Highly Efficient CO2 Electroreduction

2021 ◽  
Author(s):  
Qian Sun ◽  
Wenhao Ren ◽  
Yong Zhao ◽  
Chuan Zhao
Keyword(s):  
Catalytic Activity ◽  
Co2 Reduction ◽  
Single Atom ◽  
Practical Applications ◽  
Highly Efficient ◽  
Electrochemical Co2 Reduction ◽  
Co2 Electroreduction ◽  
High Metal

Single-atom catalysts (SACs) have attracted much interest for electrochemical CO2 reduction because of their high metal utilization and excellent catalytic activity. However, the practical applications of SACs were restricted by...

Enhancing Electrochemical CO2 Reduction Activity via Charge Transfer and sp-Band Filling in a Au Thin Layer on Ag

2020 ◽  
Vol 3 (10) ◽  
pp. 9792-9798
Author(s):  
Wen Guo ◽  
Kyubin Shim ◽  
Sang-Mun Jung ◽  
Hye Su Kang ◽  
Yong-Tae Kim
Keyword(s):  
Charge Transfer ◽  
Thin Layer ◽  
Co2 Reduction ◽  
Reduction Activity ◽  
Electrochemical Co2 Reduction ◽  
Band Filling

scholarly journals Trace Levels of Copper in Carbon Materials Show Significant Electrochemical CO2 Reduction Activity

ACS Catalysis ◽  
2015 ◽  
Vol 6 (1) ◽  
pp. 202-209 ◽  
Author(s):  
Yanwei Lum ◽  
Youngkook Kwon ◽  
Peter Lobaccaro ◽  
Le Chen ◽  
Ezra Lee Clark ◽  
...  
Keyword(s):  
Carbon Materials ◽  
Co2 Reduction ◽  
Reduction Activity ◽  
Electrochemical Co2 Reduction
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