Methanol reforming by nanostructured Pd/Sm-doped ceria catalysts

• Published in: Applied catalysis. B, Environmental Environmental, 2021-06, Vol.286, p.119935, Article 119935
• Main Authors: Kosinski, M.R., Vizcaíno, A.J., Gómez-Sainero, L.M., Carrero, A., Baker, R.T.
• Format: Article
• Language: English
• Subjects: Carbon dioxide; Catalysts; Catalytic activity; Cerium oxides; Citric acid; Hydrogen production; Impregnation; Methanol; Methanol reforming; Nanoparticles; Palladium; Reforming; Samarium; Samarium-doped ceria; Selectivity; XPS
• ISSN: 0926-3373; 1873-3883
• DOI: 10.1016/j.apcatb.2021.119935

[Display omitted] •Pd/Sm-Doped Ceria (SDC) catalysts prepared with high purity, nanostructured supports.•Highly dispersed Pd achieved in catalysts made by impregnation of pre-prepared SDC.•Catalyst activities interpreted in terms of nanostructure-performance relationships.•Impregnation from Pd(NO3)3 resulted in the most active methanol reforming catalysts.•Methanol conversions and H2 yields of up to 97.4 % and 236 %, respectively, achieved. Catalysts of 2 wt% Pd/Sm-doped Ceria (SDC) were prepared and evaluated for hydrogen production by methanol reforming. Three preparation methods were used: a one-step method in which formation of the SDC phase and Pd incorporation took place in a single citrate-complexation process (Method A); impregnation of pre-prepared SDC nanopowder supports using Pd(NO3)2 solution (Method B); and impregnation of pre-prepared SDC from H2PdCl4 solution (Method C). Both methanol conversion and hydrogen yield increased as: bare supports