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Developing anode catalysts of substantially enhanced activity for hydrogen oxidation reaction (HOR) and anti-CO poisoning performance is of great importance for the application of proton exchange membrane fuel cells (PEMFCs). Herein, we report Pd cluster in situ decorated urchin-like W18O49 (WO2.72) electrocatalysts by a photo-reduction method for high performance HOR. The synthesized Pd-WO2.72-L composite of low loading amount of 0.44 wt.% Pd by Xenon light reduction exhibits markedly high HOR catalytic activity and stability in 0.5 M H2SO4, and the specific HOR current density and mass activity of Pd-WO2.72-L are ~ 1.5 and ~ 80 times those of 20 wt.% Pt/C catalyst, respectively. Moreover, excellent anti-CO poisoning ability has also been obtained. The excellent HOR activity and anti-CO poisoning performance of Pd-WO2.72-L have been discussed mainly in terms of the dual synergetic catalytic effects between Pd and WO2.72: Pd activation to Pdδ+ by the electron transfer from Pd to W promotes the hydrogen adsorption and activation to H* species, which results in largely elevated HOR activity; Pd degradation due to the CO poisoning is effectively prevented by WO2.72, which is responsible for the excellent CO-tolerance performance.

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Publication history
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Acknowledgements

Publication history

Received: 12 September 2020
Revised: 19 October 2020
Accepted: 16 November 2020
Published: 05 July 2021
Issue date: July 2021

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Acknowledgements

The authors gratefully acknowledged the support from the Natural Science Foundation of Shanghai (No. 19ZR1479400), the State Key Laboratory for Modication of Chemical Fibers and Polymer Materials, Donghua University (No. KF1818), and the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology).

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