Abstract
The partial oxidation of methane to synthesis gas over an \(\alpha {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}\)- and a \(\gamma {\text{ - Al}}_{\text{2}} {\text{O}}_{\text{3}}\)-supported Rh catalyst has been studied at atmospheric pressure using in situ DRIFTS between 823 and 973 K. A surface intermediate species with IR band at 2000 cm-1, correlating with the CO formation, was observed during the partial oxidation. DRIFT spectra of adsorbed CO at 323 K were used to study the state of Rh during the partial oxidation. The state of Rh at 973 K is proposed to be a matrix of metallic rhodium with clusters of partially reduced oxide phase with isolated Rh+ atoms dispersed on the support. Rh oxide with Rh+ cations is the state of Rh during partial oxidation of methane at 823 K.
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Tian, Z., Dewaele, O. & Marin, G.B. The state of Rh during the partial oxidation of methane into synthesis gas. Catalysis Letters 57, 9–17 (1999). https://doi.org/10.1023/A:1019058507319
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DOI: https://doi.org/10.1023/A:1019058507319