BaO-Modified Pd-Based Catalyst for Methanol Oxidation

Xue Qiao Zhang; Ming Zhao; Zhi Xiang Ye; Sheng Yu Liu; Yao Qiang Chen

doi:10.4028/www.scientific.net/AMR.610-613.577

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 610-613BaO-Modified Pd-Based Catalyst for Methanol...

BaO-Modified Pd-Based Catalyst for Methanol Oxidation

Abstract:

Pd-based catalysts modified with BaO as a promoter was prepared by impregnation method. The catalyst was characterized by H2-temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS). The catalytic activity towards methanol showed that the BaO modification promoted the conversion of methanol. The light-off temperature (T50), complete conversion temperature (T90) and ΔT (T90-T50) for methanol oxidation are 100°C, 125°C and 25°C, respectively. The H2-TPR results showed that the addition of BaO increased palladium highly dispersed and promoted the reductive ability. It also enhanced the metal-support interaction and increased the electronic surroundings of Pd and Ce sites, which maintained Pd in a higher oxidized state and Ce4+ in Ce3+ state, consequently increased the activity for methanol oxidation according to XPS measurements.