Characterization and surface reactivity analyses of ceria nanorod catalyst for methanol interaction

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• 作者：Sujan Chowdhury ; Kuen-Song Lin ; ^{kslin@saturn.yzu.edu.tw}
• 关键词：Methanol oxidation ; Ceria nanorod ; Ceria ; Nanomaterial ; XANES/EXAFS
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 出版时间：15 March, 2012
• 年：2012
• 卷：133
• 期：1
• 页码：163-169
• 全文大小：887 K

文摘

The reactivity of commercial ceria powder and as-synthesized one dimensional (1-D) ceria-nanorod (CeNR) for methanol oxidation has been studied at an atmospheric pressure in the present study. Experimentally, ceria nanomaterials are consisted with fluorite structure and confirmed using XRD patterns. The surface areas of BET N₂ adsorption isotherms for commercial ceria powder and 1-D CeNR samples are 6 and 78 m² g^?, respectively. The EXAFS spectra reveal that the 1-D CeNR species has a CeO bonding with a bond distance of 2.4 ? and a coordination number is 6.87. Higher oxygen vacancies and Ce³⁺ are formed for CeNR as compared with the ceria powder and confirmed with both XPS and Raman spectroscopies. Moreover, two major species as named formate and methoxy are contributing on ceria for methanol dissociation, whereas, formation of carbon dioxide is evident effectively for 1-D CeNR. The reactivity for methanol oxidation of the commercial ceria powder and 1-D CeNR has been also compared.