journal article·2023-09-26

Array-Based Clusters of Copper with Largely Exposed Metal Sites for Promoting Catalysis

Xiaoxuan Xu, Ying Liu, Fang Sun, Yanyuan Jia, Qinghua Xu, Jiaqi Tang, Zhenlang Xie, Jing Sun, Simin Li, Qing Tang, Shuo Guo, Hui Shen, Nanfeng Zheng

Chemistry of Materials· Volume 35· Issue 18
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Abstract

Most ligand-stabilized metal nanoclusters feature a core–shell or polyhedron-derived metal framework, in which the metal active sites would be blocked by either metal–ligand interfacial shells or surface passive units. We report, in this work, a strategy of largely exposing metal sites and thus promoting catalysis via constructing metal nanoclusters with array-based geometry. Exampled here are a pair of Cu 8 clusters with polyhedron-derived ([Cu 8 (RS) 6 (PPh 3 ) 4 (MeCN) 4 H] +, where RS is 3,5-bis(trifluoromethyl)benzenethiol) and array-based ([Cu 8 (Tf-dpf) 4 (NO 3 ) 2 ](NO 3 ) 2, Tf-dpf is N, N ′-di(5-trifluoromethyl-2-pyridyl) formamidinate) structure, respectively. In sharp contrast to the cubic Cu 8 cluster whose metal core has been totally covered by ligands, the array-based analogue displays largely uncoordinated metal sites. As a result, the array-based Cu 8 cluster exhibits significantly enhanced activity in catalytic hydrogenation reactions in comparison to the cubic one. In addition, the array-based Cu 8 cluster shows excellent catalytic performance in the “aldehyde–acetylene–amine” A 3 -coupling reaction for the synthesis of propargylamines. The reaction can be converted almost perfectly with a rather low amount of cluster, which further reflects its potential catalytic application.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Nanocluster Synthesis and Applications · Advanced Nanomaterials in Catalysis · Gold and Silver Nanoparticles Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China

College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China

School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry Chongqing University, Chongqing 401331, China

CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China

State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National & Local Joint Engineering Research Center for Preparation Technology of Nanomaterials, and National Engineering Laboratory for Green Chemical Productions of Alcohols−Ethers−Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361102, China

Funding

Inner Mongolia University · Natural Science Foundation of Inner Mongolia · National Natural Science Foundation of China · Young science and technology talents cultivation project of Inner Mongolia University · Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region

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