Details

Autor(en) / Beteiligte

• Sun, Ningning
• Yun, Yapei
• Li, Kaikai
• Ni, Xin
• Qin, Yao
• Yang, Xiaofei
• Sheng, Hongting
• Zhu, Manzhou

Titel

Highly Efficient Conversion of Homocoupling and Heterocoupling of Terminal Alkynes Catalyzed by AuCu24/AC‐200

Ist Teil von

• European journal of inorganic chemistry, 2023-08, Vol.26 (23), p.n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Regulation of Hybrid Materials of Ministry of Education, Bimetallic nanoclusters with synergistic effect exhibit better stability and activity than monometallic nanoclusters in catalytic applications. However, the large number of ligands on the surface of nanoclusters obscure the active sites, thus reducing the catalytic activity. Here, AuCu24/AC−X (X=0, 200, 300, 500, 800) catalysts were fabricated by removing the partial ligands on the surface of AuCu24H22((p‐FPh)3P)12 nanoclusters (short for AuCu24 NCs), and investigated the influence of calcination temperature on catalytic performance of AuCu24/AC in homocoupling and heterocoupling of terminal alkynes. The results showed that the catalytic activity of AuCu24/AC−X exhibited a volcanic trend with the increase of X (heat treatment temperature) and the content of Cu2+ also changed with the increase of X. Compared with Au25/AC‐200 and Cu25/AC‐200 catalysts, the AuCu24/AC‐200 bimetallic catalyst showed the highest catalytic activity in homocoupling and heterocoupling of terminal alkynes under mild conditions with TOF values reaching 478.7 h−1 and 114.1 h−1 respectively, which are higher than most reported catalysts. This work provides a research idea for the design of bimetallic nanoclusters with superior performance. The AuCu24/AC‐200 catalyst by heat treatment exhibited excellent activity and high stability for homocoupling and heterocoupling of terminal alkynes, which is higher than those of Au25/AC‐200, Cu25/AC‐200 and most reported catalysts.