Atomically precise M 15 (M = Au/Ag/Cu) alloy nanoclusters: Structural analysis, optical and electrocatalytic CO 2 reduction properties

作者：Along Ma, Jiawei Wang, Yifei Wang, Yang Zuo, Yonggang Ren, Xiaoshuang Ma, Shuxin Wang · 发表于：Polyoxometalates · 年份：2024 · DOI：10.26599/pom.2024.9140054 · 被引用次数：31 · 研究领域：Nanocluster Synthesis and Applications、Advanced Nanomaterials in Catalysis、Carbon and Quantum Dots Applications

Herein, we report the overall structure of phosphine and mercaptan co-protected [Au 7 Ag 8 (SPh) 6 (( p -OMePh) 3 P) 8 ]NO 3 ( Au 7 Ag 8 ) nanocluster. As a point of comparison, we synthesize a nanocluster with the same structure but a different metal composition, [Au 13 Cu 2 (TBBT) 6 (( p -ClPh) 3 P) 8 ]SbF 6 ( Au 13 Cu 2 ), as previously reported. We conduct a comprehensive comparison of their optical and electrocatalytic CO 2 reduction properties. The results reveal that the photoluminescence quantum yield (PLQY) of the Ag-doped Au 7 Ag 8 nanocluster is 1.62%, which is seven times higher than that of the Cu-doped Au 13 Cu 2 nanocluster (PLQY = 0.23%). Furthermore, the Au 13 Cu 2 nanocluster demonstrates significantly enhanced catalytic selectivity for CO, with its CO faradaic efficiency ranging from 79.7% to 90.4%, compared to the Au 7 Ag 8 nanocluster (CO faradaic efficiency: 67.2% to 77.7%) within the potential range of -0.5V to -1.1V. Structural analyses attribute the superior CO selectivity of Au 13 Cu 2 to the copper dopant.