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Ultrafine and highly dispersed Pd nanoparticles have drawn considerable attention with high activity, selectivity and atomic efficiency. In this paper, amorphous Pd(Ⅱ)-complex solid spheres with ~ 5 nm Pd nanoparticles loaded on were successfully achieved through a simple and gentle one-pot solution method with vitamin B1 simultaneously as complexing agent and reducing agent. An ultrathin mesoporous SiO2 shell was then coated at the surface of Pd(Ⅱ-0) spheres as the armor which could prevent the dissolution of Pd(Ⅱ) during the catalytic process. The combination of Pd(Ⅱ) and Pd(0) endowed Pd(Ⅱ-0)@m-SiO2 catalyst an excellent performance in eco-friendly aqueous media Suzuki reactions. The high activity, productivity and recyclability were all comparable with the best Pd catalysts ever reported. The ingenious formation of amorphous Pd(Ⅱ)/crystal Pd(0) with enhanced catalytic performances provides a new, scalable strategy to practical promotion of Suzuki cross-coupling reactions.

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Publication history

Received: 19 April 2021
Revised: 21 May 2021
Accepted: 25 May 2021
Published: 22 July 2021
Issue date: February 2022

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© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Acknowledgements

Acknowledgements

The authors acknowledge the financial support from Beijing Natural Science Foundation (No. 2194077), the National Natural Science Foundation of China (Nos. 51532001 and 52002010), the National Postdoctoral Program for Innovative Talents (No. BX20180020) and the China Postdoctoral Science Foundation Funded Project (No. 2018M640041).

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Email: nanores@tup.tsinghua.edu.cn

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