Stabilization effects in binary colloidal Cu and Ag nanoparticle electrodes under electrochemical CO₂ reduction conditions

Abstract

Nanoparticle modified electrodes constitute an attractive way to tailor-make efficient carbon dioxide (CO2) reduction catalysts. However, the restructuring and sintering processes of nanoparticles under electrochemical reaction conditions not only impedes...

Dynamic Evolution of Active Sites in Electrocatalytic CO2 Reduction Reaction: Fundamental Understanding and Recent Progress

“…For instance, reported by Wu et al., the Cu–Ag bimetallic nanoparticles showed excellent structural stability under mild working conditions (−0.8 V RHE ). [ 163 ] By contrast, monometallic Cu nanoparticles would easily sinter and form larger particles, while monometallic Ag nanoparticles reconstructed resulting in dendritic assemblies under similar conditions. The existence of outer inert Au shell also greatly contributed to the stability of AuCu 3 @Au core–shell structure, resulting in negligible decay for CO production within 20 h, as demonstrated by Huang and co‐workers.…”

Effect of size distribution, skewness and roughness on the optical properties of colloidal plasmonic nanoparticles

“…Since the recent data from Wu et al [32] were obtained for monocrystalline Ag thin films, this difference is consistent with the existence of several crystalline domains even in colloidal Ag clusters of sizes as small as 5 nm. [52] Hence, the important factor here appears to be the degree of polycrystallinity or defects in the thin film samples that were used for the measurement of the optical constants, and the extent to which this matches the crystallinity of the colloidal Ag nanoparticles.…”

Recent Advances in Bimetallic Cu‐Based Nanocrystals for Electrocatalytic CO2 Conversion

“…Bimetallic Cu‐based catalyst might also overcome catalyst degradation/sintering than the monometallic Cu catalyst. For instance, binary Cu and Ag colloidal nanoparticle electrodes significantly suppressed the catalyst sintering at low overpotential of −0.8 V vs RHE and retained the catalyst shape, while severe sintering has been observed in the same CO 2 RR in monometallic counterparts [13] …”