In situ XANES study of methanol decomposition and partial oxidation to syn-gas over supported Pt catalyst on SrTiO3 nanocubes

Hui Wang, Junling Lu, Christopher L. Marshall, Jeffrey W. Elam, Jeffrey T. Miller, Hongbo Liu, James A. Enterkin, Robert M. Kennedy, Peter C. Stair, Kenneth R. Poeppelmeier, Laurence D. Marks

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A catalyst of Pt nanoparticles was prepared by atomic layer deposition on SrTiO3nanocuboids andtested for methanol decomposition and partial oxidation. The catalyst had uniform nanoparticle size of1.58 ± 0.37 nm and a Pt (1 1 1) surface. In situ X-ray absorption near-edge spectroscopy (XANES) measuredin a temperature-programmed reduction showed that the Pt particles were easily reduced. However, theas-received catalyst, a reduced catalyst, and an oxidized catalyst all had catalytic activity, differing slightly in methanol conversion and product selectivity. In situ XANES also revealed that CO adsorbed on the Pt sites was the only observed surface species during both methanol decomposition and partial oxidation. It seemed that the breakage of CH and OH bonds overwhelmingly occurred once methanol was adsorbed,forming H2 and adsorbed CO. The latter was then released from the catalyst surface or was oxidized toCO2 when O2 was present.

Original languageEnglish
Pages (from-to)71-79
Number of pages9
JournalCatalysis Today
Volume237
DOIs
Publication statusPublished - Nov 15 2014

Keywords

  • Decomposition
  • In situ XANES
  • Methanol
  • Partial oxidation
  • Platinum nanoparticle
  • SrTiO nanocuboid

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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