Pd local structure and size correlations to the activity of Pd/TiO2 for photocatalytic reforming of methanol

Abdullah N 1 , Bahruji H 2 , Rogers SM 3 , Wells PP 4 , Catlow CRA 5 , Bowker M 6

Affiliations 

  • 1 The UK Catalysis Hub, Research Complex at Harwell, Harwell, Oxon, OX11 0FA, UK and Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK and Department of Chemistry, Centre for Foundation Defence Studies, National Defence University of Malaysia, 57000, Malaysia
  • 2 The UK Catalysis Hub, Research Complex at Harwell, Harwell, Oxon, OX11 0FA, UK and Centre of Advance Material and Energy Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410, Brunei. hasliza.bahruji@ubd.edu.bn
  • 3 The UK Catalysis Hub, Research Complex at Harwell, Harwell, Oxon, OX11 0FA, UK and Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
  • 4 University of Southampton, University Road, Southampton SO17 1BJ, UK and Diamond Light Source Ltd Harwell Science and Innovation Campus, Chilton, Didcot OX11 0DE, UK
  • 5 The UK Catalysis Hub, Research Complex at Harwell, Harwell, Oxon, OX11 0FA, UK and Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK and Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 AT, UK
  • 6 The UK Catalysis Hub, Research Complex at Harwell, Harwell, Oxon, OX11 0FA, UK and Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 AT, UK
Phys Chem Chem Phys, 2019 Jul 24;21(29):16154-16160.
PMID: 31294427 DOI: 10.1039/c9cp00826h

Abstract

The interaction between Pd and TiO2 for promoting photocatalytic activity was investigated by tailoring the size of Pd nanoparticles and monitoring the photocatalytic activity of methanol photo-reforming reaction for hydrogen gas production. We show that at 0.6 wt% Pd loading, the catalyst with highly dispersed nanoparticles obtained at 1 °C temperature exhibits superior photocatalytic activity for hydrogen gas production. At different weights of Pd loading, tailoring two sets of catalysts with different structural properties provides correlation between the changes in the Pd local structures and the rate of hydrogen production. The impact of controlling the structural properties of metal nanoparticles on influencing H2 production outweighs the effect of metal loading variation. The differences of Pd/TiO2 activity at the different metal loadings were correlated with the changes in the Pd local structure consequently affecting the electronic transfer and photocatalytic efficiency.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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