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Updated: Jan 28, 2026

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

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Published on: April 10, 2018

Metal-Support Interactions in Single-Atom Catalysts for Electrochemical CO₂ Reduction.

Alexandra Mansilla-Roux¹, Mayra Anabel Lara-Angulo¹, Juan Carlos Serrano-Ruiz¹

¹Materials and Sustainability Group, Department of Engineering, Universidad Loyola Andalucía, Avda. de las Universidades s/n, 41704 Dos Hermanas, Seville, Spain.

Nanomaterials (Basel, Switzerland)

|January 27, 2026

Summary

Single-atom catalysts (SACs) enhance electrochemical CO2 reduction by tuning support properties to improve selectivity for valuable products. This review details strategies for designing SACs to overcome challenges in CO2 conversion.

Keywords:

CO2 electroreduction faradaic efficiency metal–support interactions operando characterization rational catalyst design single-atom catalysts

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Published on: December 6, 2021

Area of Science:

Catalysis
Materials Science
Electrochemistry

Background:

Electrochemical CO2 reduction (CO2RR) offers a sustainable pathway for converting greenhouse gases into fuels and chemicals.
Key challenges include sluggish CO2 activation, poor selectivity, and competition with hydrogen evolution.
Single-atom catalysts (SACs) present a promising solution due to maximized metal utilization and tunable electronic structures.

Purpose of the Study:

To review the role of single-atom catalyst supports in governing CO2RR intermediate adsorption and conversion.
To emphasize selectivity descriptors and rational design strategies for directing CO2RR pathways.
To discuss representative SAC systems and their performance under relevant conditions.

Main Methods:

Review of literature on single-atom catalysts for CO2RR.
Analysis of structure-property relationships in SAC supports (porosity, doping, vacancies).
Discussion of selectivity descriptors (coordination number, d-band position, binding energies).

Main Results:

SAC support features significantly influence CO2 adsorption and intermediate conversion, controlling product distribution (CO, CH4, CH3OH, C2+).
Electronic metal-support interactions and microenvironment engineering are crucial for directing selectivity.
N-doped carbons, oxides, and MXenes are representative supports, with performance evaluated by Faradaic efficiency, current density, and stability.

Conclusions:

Rational design of SAC supports is key to achieving high selectivity and efficiency in CO2RR.
Future directions include operando spectroscopy, data-driven analysis, machine learning, and integration into industrial electrolyzers.
SACs hold significant potential for carbon-neutral chemical production.