Homoleptic Alkynyl‐Protected Ag 15 Nanocluster with Atomic Precision: Structural Analysis and Electrocatalytic Performance toward CO 2 Reduction

Autor:	Fang Sun, Xiaoshuang Ma, Guanyu Ma, Likai Wang, Rongchao Jin, Lubing Qin, Zhenghua Tang, Qing Tang, Yun Tang
Rok vydání:	2021
Předmět:	Materials science biology Ligand Active site Crystal growth General Medicine General Chemistry Crystal structure Catalysis Nanoclusters Metal Crystallography chemistry.chemical_compound chemistry visual_art biology.protein visual_art.visual_art_medium Density functional theory Homoleptic
Zdroj:	Angewandte Chemie International Edition. 60:26136-26141
ISSN:	1521-3773 1433-7851
DOI:	10.1002/anie.202110330
Popis:	Atomically precise Ag nanoclusters provide an ideal platform to correlate the structure and electrocatalytic performance at the atomic level. Herein, we report the fabrication of homoleptic alkynyl-protected Ag15(C≡CtBu)12+ (abbreviated as Ag15) nanocluster and its electrocatalytic properties toward CO2 reduction reaction. Crystal structure analysis reveals that, Ag15 possesses a body-centered-cubic (BCC) structure with an Ag@Ag8@Ag6 metal core configuration. Interestingly, we found that, Ag15 can adsorb CO2 in air and spontaneously self-assembled into one-dimensional linear material during the crystal growth process. Furthermore, Ag15 can convert CO2 into CO with a faradaic efficiency of ~95.0% at -0.6 V and a maximal turnover frequency of 6.37 s-1 at -1.1 V along with excellent long-term stability. Finally, density functional theory calculations disclosed that, Ag15(C≡CtBu)11+ with one alkynyl ligand stripping off from the intact cluster can expose the uncoordinated Ag atom as the catalytically active site for CO formation.
Databáze:	OpenAIRE
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