Unveiling Methane Selectivity on Cu-Based Single-Atom Alloys for CO₂ Electroreduction via Synergistic DFT and Machine Learning.

Authors

Bicheng Zhang, Jiawen Liu, Huiyang Zhang, Haitao Zhao, Xiuyun Zhang, Yixin Ouyang, Li Shi

Published in

Chemistry (Weinheim an der Bergstrasse, Germany). Pages e71784. Oct 10, 2026. Epub Oct 10, 2026.

Abstract

Electrochemical CO₂ reduction offers a sustainable route for converting CO₂ into value-added fuels and chemicals, yet achieving efficient methane production remains challenging because of the complex reaction network and insufficient catalyst selectivity. Herein, density functional theory combined with interpretable machine learning were employed to investigate the structure-activity relationship of Cu-based single-atom alloys constructed by incorporating 13 transition-metal atoms into Cu(100)/(111) surfaces. The calculations reveal that isolated metal atoms effectively regulate the electronic structures of both the dopant and neighboring Cu atoms, thereby altering the energetics of HCOO* formation. More importantly, the synergistic interaction between the isolated metal atom and adjacent Cu sites stabilizes the CH₂OO*, redirecting the reaction pathway toward highly selective CH₄, in sharp contrast to pristine Cu surfaces. Among all investigated catalysts, Ge₁/Cu(100) is most active, with a limiting free energy as low as 0.24 eV while effectively suppressing the hydrogen evolution reaction. Machine learning analysis further identifies electron affinity and catalyst-support charge transfer as the two dominant descriptors governing catalytic activity, providing quantitative insight into the origin of the structure-activity relationship. This combined DFT-ML framework establishes descriptor-guided design principles for methane-selective CO₂ reduction and offers a general strategy for the rational development of high-performance single-atom alloy electrocatalysts.

PMID:
42856032
Bibliographic data and abstract were imported from PubMed on 10 Oct 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.