Au and Au-Pt bimetallic nanoparticles in MCM-41 materials: applications in CO preferential oxidation

Satyanarayana Chilukuri, Trissa Joseph, Sachin Malwadkar, Chinmay Damle, S. B. Halligudi, B. S. Rao, Murali Sastry, Paul Ratnasamy

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Abstract

Nanosized Au and Au-Pt bimetallic particles of different atomic ratios were synthesized from HAuCl4 and HPtCl6 inside the channels of amine functionalized MCM-41. These were characterized through chemical analysis, XRD and TEM. The size of the bi-metallic particles was found to be in the range of 2-4 nm. Their catalytic activities were evaluated in simulated gas mixtures that typically contain 0.5 and 0.96% CO in presence of large proportions (∼74%) of H2. The catalysts that contain higher concentrations of Pt were found to be active and offer good CO preferential oxidation activity. Catalysts that contain an optimum amount of Au along with Pt have shown highest activities at lower temperatures.

Original languageEnglish
Pages (from-to)573-576
Number of pages4
JournalStudies in Surface Science and Catalysis
Volume146
DOIs
Publication statusPublished - 2003
Externally publishedYes

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