Nanocomposites of tantalum-based pyrochlore and indium hydroxide showing high and stable photocatalytic activities for overall water splitting and carbon dioxide reduction

Meng Chun Hsieh, Guan Chang Wu, Wei Guang Liu, William A. Goddard, Chia Min Yang

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Nanocomposites of tantalum-based pyrochlore nanoparticles and indium hydroxide were prepared by a hydrothermal process for UV-driven photocatalytic reactions including overall water splitting, hydrogen production from photoreforming of methanol, and CO2 reduction with water to produce CO. The best catalyst was more than 20 times more active than sodium tantalate in overall water splitting and 3 times more active than Degussa P25 TiO2 in CO2 reduction. Moreover, the catalyst was very stable while generating stoichiometric products of H2 (or CO) and O2 throughout long-term photocatalytic reactions. After the removal of In(OH)3, the pyrochlore nanoparticles remained highly active for H2 production from pure water and aqueous methanol solution. Both experimental studies and density functional theory calculations suggest that the pyrochlore nanoparticles catalyzed the water reduction to produce H2, whereas In(OH)3 was the major active component for water oxidation to produce O2.

Original languageEnglish (US)
Pages (from-to)14216-14220
Number of pages5
JournalAngewandte Chemie - International Edition
Volume53
Issue number51
DOIs
StatePublished - Dec 15 2014

Bibliographical note

Publisher Copyright:
© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

  • CO reduction
  • Indium hydroxide
  • Photocatalysis
  • Tantalum-based pyrochlore
  • Water splitting

Fingerprint

Dive into the research topics of 'Nanocomposites of tantalum-based pyrochlore and indium hydroxide showing high and stable photocatalytic activities for overall water splitting and carbon dioxide reduction'. Together they form a unique fingerprint.

Cite this