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Zeolite supported Pd electrocatalyst nanoparticle characterization

Yao, Jun; Yao, Yufeng

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Authors

Dr Jun Yao Jun.Yao@uwe.ac.uk
Senior Lecturer Aerospace Themofluids

Yufeng Yao Yufeng.Yao@uwe.ac.uk
Professor in Aerospace Engineering



Abstract

© 2018 Hydrogen Energy Publications LLC A laboratory made 1.5 wt% Palladium (Pd) zeolite electrocatalyst is investigated using the Extended X-ray Adsorption Fine Structure (EXAFS) and Cyclic Voltammetry (CV) techniques to reveal Pd structure and resultant electrochemical performance. It was found that the electrochemical activity of hydrogen charger transfer in the hydride region increased for electrocatalyst with large-size particles made at high temperature of 400 °C, compared to those with small-size particles calcined and reduced at temperature below 360 °C, at which no major discrepancies were observed between catalysts of different sizes. Furthermore, Pd particle location has played an important role to enhance electrocatalyst performance. The Pd atom tends to remain at small cages, i.e. zeolite sodalite cages or hexagonal prisms at calcinations and reduction temperatures below 360 °C. When temperature increases to about 400 °C, the majority Pd atoms tend to migrate from zeolite small cages to supercages and zeolite external structures with enhanced electrochemical performance.

Citation

Yao, J., & Yao, Y. (2019). Zeolite supported Pd electrocatalyst nanoparticle characterization. International Journal of Hydrogen Energy, 44(1), 287-294. https://doi.org/10.1016/j.ijhydene.2018.02.110

Journal Article Type Article
Acceptance Date Feb 18, 2018
Online Publication Date Mar 12, 2018
Publication Date Jan 1, 2019
Deposit Date Mar 19, 2018
Publicly Available Date Mar 12, 2019
Journal International Journal of Hydrogen Energy
Print ISSN 0360-3199
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 44
Issue 1
Pages 287-294
DOI https://doi.org/10.1016/j.ijhydene.2018.02.110
Public URL https://uwe-repository.worktribe.com/output/854423
Publisher URL http://dx.doi.org/10.1016/j.ijhydene.2018.02.110
Additional Information Additional Information : This is the author's accepted manuscript. The final published version is available at http://dx.doi.org/10.1016/j.ijhydene.2018.02.110.

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