Bulky Thiolate-Protected Silver Nanocluster Ag_(213)(Adm-S)_(44)Cl_(33)with Excellent Electrocatalytic Performance toward Oxygen Reduction  

作　　者：Chen-Guang Shi Jian-Hua Jia Yaling Jia Guangqin Li Ming-Liang Tong 

机构地区：[1]Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,School of Chemistry,Sun Yat-sen University,Guangzhou,Guangdong 510006

出　　处：《CCS Chemistry》2023年第5期1154-1162,共9页中国化学会会刊（英文）

基　　金：supported by the National Natural Science Foundation of China(grant nos.21771198,22071274,21821003).

摘　　要：Atomically precise gold and/or silver nanoclusters play a key role in crystallography and coordination chemistry.Compared with gold nanoclusters,silver nanoclusters become unstable and difficult to crystallize due to the high reactivity ofmetal silver.Herein,we report a silver nanocluster Ag_(213)(Adm-S)_(44)Cl_(33)(Ag_(213))coprotected by bulky thiolates and chlorides.The low surface thiolate coverage(about 45%)endows Ag_(213)with high catalytic activity.Supported on activated carbon,Ag_(213)nanoclusters exhibit excellent electrocatalytic oxygen reduction performance with Eonset and E_(1/2)values of 0.89 and 0.72 V,respectively,close to the values of commercial Pt/C catalyst.This is the first report on the electrocatalytic oxygen reduction reaction of nanoclusters with more than 100 silver atoms.Ag_(213)with the diameter of 2.75 nm comprises a core–shell structure Ag_(7)@Ag_(32)@Ag_(77)@Ag_(97).The strong plasmonic absorption band at 454 nm reveals the metallic nature of Ag_(213).Interestingly,halide is of importance.Chloride facilitates the formation of Ag_(213)and Ag_(56)(Adm-S)_(33)Cl_(16)(Ag_(56)^(Cl))while bromide can promote the formation of Ag_(56)(Adm-S)_(33)Br_(16)(Ag_(56)Br).This work provides an example for the study of largesized metal nanoclusters and nanocluster-based electrocatalysts.

关 键 词：SILVER NANOCLUSTERS atomically precise structure oxygen reduction reaction electrocatalysis 

分 类 号：O64[理学—物理化学]