Ligand‐Protected Au52Cu72(SR)55 Nanoclusters Supported onto SBA‐15 by Electrostatic Attraction as Efficient and Stable Catalysts for Click Reaction

Abstract As heterogeneous catalysts, nanoclusters have been extensively investigated because of their exceptional catalytic performance. In this work, we propose an electrostatic attraction strategy to immobilize atomically precise positively charged [Au 52 Cu 72 (SR) 55 ] + (denoted as Au 52 Cu 72 (SR) 55 ) nanoclusters supported onto negatively charged SBA‐15. As expected, the Au 52 Cu 72 (SR) 55 /SBA‐15 catalysts display outstanding activity for driving the benzyl azide‐phenylacetylene cycloaddition reaction (called as click reaction). In comparison to Au 11 /SBA‐15 and Cu 13 /SBA‐15 catalysts, the bimetallic Au 52 Cu 72 (SR) 55 /SBA‐15 catalysts exhibit the highest catalytic activity for click reaction. Moreover, to explore the effect of ligands on the catalytic performance of Au 52 Cu 72 (SR) 55 /SBA‐15 catalysts, Au 52 Cu 72 (SR) 55 /SBA‐15‐X (X is the heat treatment temperature, X=120, 250, 300) catalysts are obtained by calcining at different temperatures. Compared with Au 52 Cu 72 (SR) 55 /SBA‐15‐X (X=120, 250, 300), the uncalcined Au 52 Cu 72 (SR) 55 /SBA‐15 catalysts show the best recyclability for click reaction. The structural integrity of the Au 52 Cu 72 (SR) 55 nanoclusters is a key factor contributing to their exceptional cyclic performance. This work will be valuable for designing an ideal ligand‐protected clusters‐based catalysts with superior performance for organic reactions.