In this study, we constructed a model system with spatially separated Au nanoparticles (NPs) and nitrogen-doped reduced graphene oxide (NrGO) to experimentally demonstrate that room-temperature CO oxidation proceeds via a mixed-potential mechanism.
The measured reaction current and potential matched well with the independently obtained current–potential profiles of each half-reaction, providing strong evidence for this mechanism.

https://advanced.onlinelibrary.wiley.com/doi/10.1002/advs.202505994