Catalytic methane steam reforming was conducted at low temperature using a Pd catalyst supported on Ce M O ( = 0 or 0.1, M = Ca, Ba, La, Y or Al) oxides with or without an electric field (EF). The effects of the catalyst support on catalytic activity and surface proton hopping were investigated. Results show that Pd/Al-CeO (Pd/CeAlO) showed higher activity than Pd/CeO with EF, although their activity was identical without EF. Thermogravimetry revealed a larger amount of HO adsorbed onto Pd/Al-CeO than onto Pd/CeO, so Al doping to CeO contributes to greater HO adsorption. Furthermore, electrochemical conduction measurements of Pd/Al-CeO revealed a larger contribution of surface proton hopping than that for Pd/CeO. This promotes the surface proton conductivity and catalytic activity during EF application.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9052117 | PMC |
http://dx.doi.org/10.1039/d0ra01721c | DOI Listing |
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