Journal Home > Volume 15 , Issue 3

Although high-efficiency production of hydrogen peroxide (H2O2) can be realized separately by means of direct, electrochemical, and photocatalytic synthesis, developing versatile catalysts is particularly challenging yet desirable. Herein, for the first time we reported that palladium-sulphur nanocrystals (Pd-S NCs) can be adopted as robust and universal catalysts, which can realize the efficient O2 conversion by three methods. As a result, Pd-S NCs exhibit an excellent selectivity (89.5%) to H2O2 with high productivity (133.6 mol·kgcat−1·h−1) in the direct synthesis, along with the significantly enhanced H2O2 production activity and stability via electrocatalytic and photocatalytic syntheses. It is demonstrated that the isolated Pd sites can enhance the adsorption of O2 and inhibit its O–O bond dissociation, improving H2O2 selectivity and reducing H2O2 degradation. Further study confirms that the difference in surface atom composition and arrangement is the key factor for different ORR mechanisms on Pd NCs and Pd-S NCs.

Publication history
Copyright
Acknowledgements

Publication history

Received: 04 June 2021
Revised: 26 July 2021
Accepted: 01 August 2021
Published: 17 August 2021
Issue date: March 2022

Copyright

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

Acknowledgements

Acknowledgements

This work was financially supported by the National Key R&D Program of China (Nos. 2017YFA0208200 and 2016YFA0204100), the National Natural Science Foundation of China (No. 22025108), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and the start-up supports from Xiamen University.

Return