Effects of CeO2 pre-calcined at different temperatures on the performance of Pt/CeO2-C electrocatalyst for methanol oxidation reaction

• Published in: International journal of minerals, metallurgy and materials metallurgy and materials, 2021-07, Vol.28 (7), p.1224-1232
• Main Authors: Li, Guo-qing, Wen, Pu-kang, Gao, Chen-qiang, Zhang, Tian-yi, Hu, Jun-yang, Zhang, Yu-hao, Guan, Shi-you, Li, Qing-feng, Li, Bing
• Format: Article
• Language: English
• Subjects: Carbon; Catalysts; Catalytic activity; Ceramics; Cerium oxides; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Corrosion and Coatings; Current density; Electrocatalysts; Electrochemistry; Electrodes; Electrons; Glass; Graphene; Materials Science; Metal oxides; Metallic Materials; Methanol; Natural Materials; Oxidation; Poisoning; Poisons; Radiation; Roasting; Surfaces and Interfaces; Thin Films; Tribology
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-020-2076-2

Pt/CeO 2 -C catalysts with CeO 2 pre-calcined at 300–600°C were synthesized by combining hydrothermal calcination and wet impregnation. The effects of the pre-calcined CeO 2 on the performance of Pt/CeO 2 -C catalysts in methanol oxidation were investigated. The Pt/CeO 2 -C catalysts with pre-calcined CeO 2 at 300–600°C showed an average particle size of 2.6–2.9 nm and exhibited better methanol electro-oxidation catalytic activity than the commercial Pt/C catalyst. In specific, the Pt/CeO 2 -C catalysts with pre-calcined CeO 2 at 400°C displayed the highest electrochemical surface area value of 68.14 m 2 ·g −1 and I f / I b ratio (the ratio of the forward scanning peak current density ( I f ) and the backward scanning peak current density ( I b )) of 1.26, which are considerably larger than those (53.23 m 2 ·g −1 and 0.79, respectively) of the commercial Pt/C catalyst, implying greatly enhanced CO tolerance.