Promoted activity of annealed Rh nanoclusters on thin films of Al2O3/NiAl(100) in the dehydrogenation of Methanol-d4

Ting Chieh Hung, Ting Wei Liao, Guan Jr Liao, Zhen He Liao, Po Wei Hsu, Yu Ling Lai, Yao Jane Hsu, Chia Hsin Wang, Yaw Wen Yang, Jeng Han Wang, Meng Fan Luo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Annealed Rh nanoclusters on an ordered thin film of Al2O3/NiAl(100) were shown to exhibit a promoted reactivity toward the decomposition of methanol-d4, under both ultrahigh vacuum and near-ambient-pressure conditions. The Rh clusters were grown with vapor deposition onto the Al2O3/NiAl(100) surface at 300 K and annealed to 700 K. The decomposition of methanol-d4proceeded only through dehydrogenation, with CO and deuterium as products, on Rh clusters both as prepared and annealed. Nevertheless, the catalytic reactivity of the annealed clusters, measured with the production of either CO or deuterium per surface Rh site from the reaction, became at least 2-3 times that of the as-prepared ones. The promoted reactivity results from an altered support effect associated with an annealing-induced mass transport at the surface. Our results demonstrate a possibility to practically prepare reactive Rh clusters, regardless of the cluster size, that can tolerate an elevated reaction temperature, with no decreased reactivity.

Original languageEnglish
Pages (from-to)24762-24771
Number of pages10
JournalRSC Advances
Volume11
Issue number40
DOIs
Publication statusPublished - 2021 Jul 12

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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