Tang Shisi, Xu Jiayu, Liu Xu, Zhu Yan
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
Chemistry. 2022 Aug 16;28(46):e202201262. doi: 10.1002/chem.202201262. Epub 2022 Jun 30.
A novel Ag doped Au (C H ) nanocluster (C H =1-ethynyl-2,4-dimethylbenzene) was synthesized, that is, Ag Au (C H ) (x≤6), where four Ag positions located in the surface staple of the cluster have been determined, while six Au/Ag co-occupying positions have been found in the metal core of the cluster. The electronic configuration of Au (C H ) cluster is significantly disturbed by doping Ag atoms, hence promoting the electron transport capability. For the two-electron conversion reaction of CO to CO in electrochemical reduction of CO , Ag doped Ag Au (C H ) catalyst exhibited higher effective activity and long-term stability than its counterpart Au (C H ) catalyst.
合成了一种新型的Ag掺杂Au（C₆H₆）纳米团簇（C₆H₆ = 1-乙炔基-2,4-二甲基苯），即AgₓAu₁₋ₓ（C₆H₆）（x≤6），其中已确定位于团簇表面主链上的四个Ag位置，同时在团簇的金属核中发现了六个Au/Ag共占据位置。掺杂Ag原子显著扰乱了Au（C₆H₆）团簇的电子构型，从而提高了电子传输能力。在CO₂的电化学还原中，对于CO₂到CO的双电子转换反应，Ag掺杂的AgₓAu₁₋ₓ（C₆H₆）催化剂比其对应的Au（C₆H₆）催化剂表现出更高的有效活性和长期稳定性。
