Antioxidative and stable PdZn/ZnO/Al2O3 catalyst coatings concerning methanol steam reforming for fuel cell-powered vehicles

Peijian Yan, Pengfei Tian, Cheng Cai, Shenghu Zhou, Xinhai Yu, Shuangliang Zhao, Shan-Tung Tu, Chengwei Deng and Yi Sun

Applied Energy, 2020, vol. 268, issue C, No S0306261920305559

Abstract: In the real application of on-board hydrogen production for proton exchange membrane fuel cell (PEMFC)-powered vehicles, catalysts promoting steam reforming of methanol (SRM) for hydrogen production suffer frequent oxidation considering how intermittently vehicles are driven. To address this challenge, PdZn/ZnO/Al2O3 catalyst coatings with different molar ratios were prepared by the co-reduction method. The results showed a favorable effect of the high molar ratio of Zn to Pd on regenerating the PdZn intermetallic compounds by reducing the oxidized catalysts. This is because Zn atoms preferentially diffused into PdHx NPs along the PdHx 〈1 1 1〉 direction to form PdZn intermetallic compounds, and a high molar ratio of Zn to Pd guaranteed abundant Zn atoms along PdHx 〈1 1 1〉 direction during the reduction process. The oxidized PdZn/ZnO/Al2O3 catalyst coatings gradually recovered their catalytic activity due to the regeneration of PdZn intermetallic compounds. The PdZn/ZnO/Al2O3 catalyst coatings showed better stability than the reported catalysts and an excellent antioxidation ability in the SRM reaction, suggesting great potential for the on-board production of hydrogen for PEMFC-powered vehicles if coupled with a high-temperature water-gas shift reactor.

Keywords: Hydrogen production; Fuel cell; Oxidation; Steam reforming of methanol; Catalysts (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261920305559
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:268:y:2020:i:c:s0306261920305559

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2020.115043

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().