scholarly journals In situ study of surface species and structure over Oxide-Derived Copper Catalysts for Electrochemical CO2 Reduction

2021 ◽  
Author(s):  
Chunjun Chen ◽  
Xupeng Yan ◽  
Yahui Wu ◽  
Shoujie Liu ◽  
Xiaofu Sun ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Copper Catalysts ◽  
Reaction Process ◽  
Real Structure ◽  
Surface Species ◽  
The Real ◽  
Effective Catalyst ◽  
In Situ Study ◽  
Electrochemical Co2 Reduction

The oxide-derived copper (OD-Cu) has been discovered as effective catalyst for electroreduction of CO2 to C2+ products. The real structure of the OD-Cu and surface species in the reaction process...

In situ study of surface species and structure over Oxide-Derived Copper Catalysts for Electrochemical CO2 Reduction

2020 ◽  
Author(s):  
Chunjun Chen ◽  
Xupeng Yan ◽  
Yahui Wu ◽  
Shoujie Liu ◽  
Xiaofu Sun ◽  
...  
Keyword(s):  
Active Sites ◽  
Density Functional ◽  
Isotope Labeling ◽  
Copper Catalysts ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Species ◽  
Faradaic Efficiency ◽  
Electrochemical Co2 Reduction ◽  
Cu Catalysts

Abstract The oxide-derived copper (OD-Cu) has been discovered as effective catalyst for electroreduction of CO2 to C2+ products. The real structure of the OD-Cu and surface species in the reaction process are interesting phenomena, which are not clear now. Herein, in situ surface-enhanced Raman spectroscopy (SERS), operando X-ray absorption spectroscopy (XAS), 18O isotope labeling experiments, and density functional theory were employed to investigate the surface speciation and structure of the OD-Cu catalysts during CO2 electroreduction. It was found that the OD-Cu catalysts were reduced to metallic Cu(0) in the reaction. CuOx species existed on the catalyst surfaces during CO2RR, which resulted from the chemisorption of CO2 instead of active sites of the catalyst. After removing potential, Cu2O was formed on the surface of the catalyst by reaction of Cu and H2O. It was also found that Cu (100) facet can be enhanced by redox cycling treatment of the catalyst, leading to outstanding performance of the catalyst. The Faradaic efficiency(FE) for C2+ products reached up to 83.8% at current density of 341.5 mA•cm-2 at -0.9 V vs RHE. The findings of this work are very interesting knowledge in the area in electrochemical reduction of CO2. The work also demonstrates advantage and necessity of in situ experimental methods in exploring the interesting phenomena in the process of CO2RR.

Selective electrochemical CO2 reduction to CO using in situ reduced In2O3 nanocatalysts

2017 ◽  
Vol 5 (43) ◽  
pp. 22743-22749 ◽  
Author(s):  
Charles I. Shaughnessy ◽  
Dylan T. Jantz ◽  
Kevin C. Leonard
Keyword(s):  
Co2 Reduction ◽  
Electrochemical Co2 Reduction

The electrochemically-formed In0–In2O3 composite changes the selectivity of CO2 reduction on In from formate to CO at relatively low overpotentials.

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.

In-situ Generated Hydroxides Realize Near-unity CO Selectivity for Electrochemical CO2 Reduction

2021 ◽  
pp. 133785
Author(s):  
Jing Xiao ◽  
Subiao Liu ◽  
Peng-Fei Sui ◽  
Chenyu Xu ◽  
Lu Gong ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Electrochemical Co2 Reduction

Electrochemical CO2 Reduction Catalysed by Cobalt Octacyanophthalocyanine and its Mechanism

1997 ◽  
Vol 01 (04) ◽  
pp. 315-321 ◽  
Author(s):  
TOSHIYUKI ABE ◽  
HIROSHI IMAYA ◽  
TSUKASA YOSHIDA ◽  
SUMIO TOKITA ◽  
DERCK SCHLETTWEIN ◽  
...  
Keyword(s):  
Catalytic Mechanism ◽  
Graphite Electrode ◽  
Co2 Reduction ◽  
Intermediate Formation ◽  
Homogeneous System ◽  
Applied Potential ◽  
Rate Determining Step ◽  
Electrochemical Co2 Reduction ◽  
Formation Step

Electrochemical CO 2 reduction was studied by using a graphite electrode coated with cobalt octacyanophthalocyanine ( CoPc ( CN )8) and dipped in an aqueous phase. The most active and selective CO 2 reduction was achieved at −1.20 V (vs Ag / AgCl ) with the ratio of the produced CO / H 2 around 10 at pH 9.3. The electrocatalytic CO 2 reduction by CoPc ( CN )8 could be achieved at a more positive applied potential than non-substituted CoPc ( CoPc ), which can be ascribed to the relatively positive redox potential of CoPc ( CN )8. The catalytic mechanism of the CoPc ( CN )8 in a homogeneous system was investigated by an in situ potential-step chronoamperospectroscopy under argon and under CO 2 as well. In CoPc ( CN )8 the rate-determining step was an intermediate formation step, while in CoPc it was the second reduction of the complex.

In situ exsolved FeNi3 nanoparticles on nickel doped Sr2Fe1.5Mo0.5O6−δ perovskite for efficient electrochemical CO2 reduction reaction

2019 ◽  
Vol 7 (19) ◽  
pp. 11967-11975 ◽  
Author(s):  
Houfu Lv ◽  
Le Lin ◽  
Xiaomin Zhang ◽  
Dunfeng Gao ◽  
Yuefeng Song ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Reduction Reaction ◽  
Electrochemical Co2 Reduction ◽  
Co2 Reduction Reaction

In situ exsolved FeNi3 nanoparticles on nickel doped Sr2Fe1.5Mo0.5O6−δ perovskite greatly enhance the performance of the electrochemical CO2 reduction reaction.

In-situ study of reduction of copper catalysts

1990 ◽  
Vol 4 (1) ◽  
pp. 15-24 ◽  
Author(s):  
M. S. W. Vong ◽  
P. A. Sermon ◽  
K. Grant
Keyword(s):  
Copper Catalysts ◽  
In Situ Study

Two-dimensional Materials for Electrochemical CO2 Reduction: Materials, In Situ/Operando Characterizations, and Perspective

Nanoscale ◽  
2021 ◽  
Author(s):  
Zuolong Chen ◽  
Xiyang Wang ◽  
Joel P. Mills ◽  
Cheng Du ◽  
Jintae Kim ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Environmental Sustainability ◽  
Co2 Reduction ◽  
Energy Generation ◽  
Two Dimensional ◽  
Gas Concentration ◽  
Efficient Approach ◽  
Electrochemical Co2 Reduction ◽  
Two Dimensional Materials

Electrochemical CO2 reduction (CO2 ECR) is an efficient approach to achieving eco-friendly energy generation and environmental sustainability. This approach is capable of lowering the CO2 greenhouse gas concentration in the...

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