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Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO

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CO₂ Reduction Mechanism on the Cu₂ O(110) Surface: A First-Principles Study.

Haihang Chen¹, Ting Fan¹, Yongfei Ji²

¹School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, P. R. China.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry

|February 10, 2023

Summary

Copper oxide (Cu2O) shows promise for converting carbon dioxide (CO2) to methanol. This study reveals that preserving the Cu(I) oxidation state is crucial for high methanol selectivity, offering new catalyst design strategies.

Keywords:

CO2 reduction Cu2O density functional calculation selectivity

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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Area of Science:

Catalysis
Surface Science
Computational Chemistry

Background:

Copper(I) oxide (Cu2O) is a promising catalyst for CO2 reduction to methanol.
The precise reaction mechanism and the role of copper oxidation states remain unclear.

Purpose of the Study:

To investigate the CO2 reduction mechanism on the Cu2O(110) surface using first-principles calculations.
To elucidate the role of different copper oxidation states in CO2 conversion.

Main Methods:

First-principles calculations.
Investigation of Cu2O(110) surfaces with varying degrees of reduction (ideal, slightly reduced surface (SRS), and partially reduced surface (PRS)).

Main Results:

On the ideal surface, surface oxygen, not Cu(I), actively converts CO2 to methanol (CH3OH) with a limiting potential of -0.77 V.
Cu(0) on SRS and PRS facilitates CO2 adsorption and reduction, but oxygen removal becomes rate-limiting.
SRS is selective for methanol, while PRS favors methane production.

Conclusions:

Maintaining the Cu(I) oxidation state is key for high methanol selectivity in CO2 reduction.
Avoiding excessive reduction of Cu(I) is a critical strategy for designing efficient methanol synthesis catalysts.