scholarly journals Role of a Hydroxide Layer on Cu Electrodes in Electrochemical CO2 Reduction

ACS Catalysis ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 6305-6319 ◽  
Author(s):  
Go Iijima ◽  
Tomohiko Inomata ◽  
Hitoshi Yamaguchi ◽  
Miho Ito ◽  
Hideki Masuda
Keyword(s):  
Co2 Reduction ◽  
Electrochemical Co2 Reduction

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 Operando surface chemistry of micro- and nanocubic copper catalysts for electrochemical CO2 reduction

2021 ◽  
Author(s):  
Karla Banjac ◽  
Thanh Hai Phan ◽  
Fernando P. Cometto ◽  
Patrick Alexa ◽  
Yunchang Liang ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Copper Catalysts ◽  
Product Formation ◽  
Atomic Processes ◽  
Renewable Chemicals ◽  
Electrochemical Co2 Reduction ◽  
Tunnelling Microscopy ◽  
Reduction Of Co2 ◽  
Cu Nanostructures

The electrochemical reduction of CO2 (CO2RR) into multicarbon compounds is a promising pathway towards renewable chemicals. Structure-product selectivity studies highlight that copper (100) facets favour C2+ product formation. However, the atomic processes leading to the formation of (100)-rich Cu cubes remains elusive. Herein, we use Cu and graphene-protected Cu surfaces to reveal the differences in structure and composition of common Cu-based electrocatalysts, from nano to micrometer scales. We show that stripping/electrodeposition cycles lead to thermodynamically controlled growth of Cu2O micro/nanocubes, while multi-layered Cu nanocuboids form universally during CO2RR upon polarization-driven re-organization of Cu0 atoms. A synergy of electrochemical characterization by scanning tunnelling microscopy (EC-STM), operando EC-Raman and quasi-operando X-Ray Photoemission spectroscopy (XPS) allows us to shed light on the role of oxygen on the dynamic interfacial processes of Cu, and to demonstrate that chloride is not needed for the stabilization of cubic Cu nanostructures.

Understanding the role of functional groups of thiolate ligands in electrochemical CO2 reduction over Au(111) from first-principles

2019 ◽  
Vol 7 (34) ◽  
pp. 19872-19880 ◽  
Author(s):  
Fuhua Li ◽  
Qing Tang
Keyword(s):  
Catalytic Activity ◽  
Functional Groups ◽  
First Principles ◽  
Co2 Reduction ◽  
Product Selectivity ◽  
Thiolate Ligands ◽  
Electrochemical Co2 Reduction

The functional groups of thiolates strongly affect the catalytic activity and product selectivity of CO2 electroreduction on Au(111).

Crucial Role of Surface Hydroxyls on the Activity and Stability in Electrochemical CO2 Reduction

2019 ◽  
Vol 141 (7) ◽  
pp. 2911-2915 ◽  
Author(s):  
Wanyu Deng ◽  
Lei Zhang ◽  
Lulu Li ◽  
Sai Chen ◽  
Congling Hu ◽  
...  
Keyword(s):  
Crucial Role ◽  
Co2 Reduction ◽  
Electrochemical Co2 Reduction ◽  
Surface Hydroxyls

Role of Oxygen-Bound Reaction Intermediates in Selective Electrochemical CO2 Reduction

2021 ◽  
Author(s):  
Xing Zhi ◽  
Anthony Vasileff ◽  
Yao Zheng ◽  
Yan Jiao ◽  
Shizhang Qiao
Keyword(s):  
Co2 Reduction ◽  
Reduction Reaction ◽  
Reaction Pathways ◽  
Reaction Intermediates ◽  
Electrochemical Co2 Reduction ◽  
End Products ◽  
Co2 Reduction Reaction

The electrochemical CO2 reduction reaction (CRR) is intrinsically complex given the multiple possible reaction pathways and end products. Consequently, selectivity is a persistent challenge for the design and operation of...

The Role of Adsorbed CN and Cl on an Au Electrode for Electrochemical CO2 Reduction

ACS Catalysis ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 1178-1185 ◽  
Author(s):  
Minhyung Cho ◽  
Jun Tae Song ◽  
Seoin Back ◽  
Yousung Jung ◽  
Jihun Oh
Keyword(s):  
Co2 Reduction ◽  
Au Electrode ◽  
Electrochemical Co2 Reduction

An NADH-Inspired Redox Mediator Strategy to Promote Second-Sphere Electron and Proton Transfer for Cooperative Electrochemical CO2 Reduction Catalyzed by Iron Porphyrin

2020 ◽  
Author(s):  
Peter T. Smith ◽  
Sophia Weng ◽  
Christopher Chang
Keyword(s):  
Proton Transfer ◽  
Co2 Reduction ◽  
Iron Porphyrin ◽  
Redox Mediators ◽  
Reservoir Properties ◽  
Proton Reduction ◽  
Electrochemical Co2 Reduction ◽  
Starting Point ◽  
Rate Improvement ◽  
Molecular Catalysts

We present a bioinspired strategy for enhancing electrochemical carbon dioxide reduction catalysis by cooperative use of base-metal molecular catalysts with intermolecular second-sphere redox mediators that facilitate both electron and proton transfer. Functional synthetic mimics of the biological redox cofactor NADH, which are electrochemically stable and are capable of mediating both electron and proton transfer, can enhance the activity of an iron porphyrin catalyst for electrochemical reduction of CO<sub>2</sub> to CO, achieving a 13-fold rate improvement without altering the intrinsic high selectivity of this catalyst platform for CO<sub>2</sub> versus proton reduction. Evaluation of a systematic series of NADH analogs and redox-inactive control additives with varying proton and electron reservoir properties reveals that both electron and proton transfer contribute to the observed catalytic enhancements. This work establishes that second-sphere dual control of electron and proton inventories is a viable design strategy for developing more effective electrocatalysts for CO<sub>2</sub> reduction, providing a starting point for broader applications of this approach to other multi-electron, multi-proton transformations.

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