March 3, 2026

Laser-Fabricated Graphene-Supported Copper Nanoparticles for Electrochemical CO 2 Reduction

Puntos clave

High selectivity (85% Faradaic efficiency) for CH4 generation at −2.4 V vs RHE indicates efficient electrocatalytic activity.
Cu nanoparticles (∼10 nm) supported on graphene demonstrate the ability to catalyze CO2 reduction to multiple products.
Electrocatalyst performance is enhanced with a Nafion overlayer, tuning selectivity towards C2H4 production via a specific intermediate.
Laser-assisted nanomaterial preparation allows for controlled fabrication of electrocatalysts under mild conditions.

Resumen

In this work, a laser-assisted nanomaterial preparation (LANP) method is utilized to fabricate Cu nanoparticles (NPs) supported on graphene. Because LANP is performed at room temperature and under ambient pressure, it enables the production of monodispersed Cu NPs supported on a few-layer graphene carbon network. These small Cu NPs (∼10 nm) exhibit the catalytic ability to reduce CO2 to HCOOH, CH3OH, CO, CH4, and C2H4. We study the graphene-supported Cu electrocatalysts as a function of the applied potential and find that CH4 is generated in high selectivity (85% Faradaic efficiency) at −2.4 V vs RHE. Furthermore, the selectivity of products can be tuned by the addition of a proton-conducting fluoropolymer (Nafion) overlayer of 2 or 15 μm. The Cu NPs in conjunction with Nafion enhance C2H4 production through the dimerization of a Nafion-stabilized Cu-CO intermediate. Taken together, these results demonstrate that the LANP method can be used to construct CO2 reduction catalysts with a controlled selectivity.

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Cite This Study

Pan et al. (Sat,) studied this question.

synapsesocial.com/papers/69a75a1cc6e9836116a1fa6b https://doi.org/https://doi.org/10.1021/acsaem.5c04005

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