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Cardiff, United Kingdom

Lee A.F.,Cardiff Catalysis Institute
Australian Journal of Chemistry | Year: 2012

Nanostructured heterogeneous catalysts will play a key role in the development of robust artificial photosynthetic systems for water photooxidation and CO2 photoreduction. Identifying the active site responsible for driving these chemical transformations remains a significant barrier to the design of tailored catalysts, optimized for high activity, selectivity, and lifetime. This highlight reveals how select recent breakthroughs in the application of in situ surface and bulk X-ray spectroscopies are helping to identify the active catalytic sites in a range of liquid and gas phase chemistry. © CSIRO 2012.

Buckley J.J.,University of York | Lee A.F.,Cardiff Catalysis Institute | Olivi L.,Sincotrone Trieste | Wilson K.,Cardiff Catalysis Institute
Journal of Materials Chemistry | Year: 2010

High surface area hydroxyapatites have been explored as biocompatible supports for antibacterial applications. Porosimetry, XRD, XPS and XAS reveal that Ag-doped mesoporous hydroxyapatite promotes the genesis of potent Ag 3PO4 nanoparticles, effective against Staphylococcus aureus and Pseudomonas aeruginosa. © 2010 The Royal Society of Chemistry.

Dacquin J.-P.,Cardiff Catalysis Institute | Lee A.F.,Cardiff Catalysis Institute | Wilson K.,Cardiff Catalysis Institute
ACS National Meeting Book of Abstracts | Year: 2010

There is a pressing need for sustainable transportation fuels to combat both climate change and dwindling fossil fuel reserves. Biodiesel, synthesised from non-food plant (e.g., Jatropha curcas) or algal crops is one possible solution, but its energy efficient production requires design of new solid catalysts optimized for the bulky triglyceride and fatty acid feedstocks. Here we report on the synthesis of hierarchical macroporous-mesoporous silica and alumina architectures, and their subsequent functionalization by propylsulfonic acid groups or alkaline earth oxides to generate novel solid acid and base catalysts. These materials possess high surface areas and well-defined, interconnected macro-mesopore networks with respective narrow pore size distributions tuneable around 300 nm and 5 nm. Their high conductivity and improved mass transport characteristics enhance activity towards transesterification of bulky tricaprylin and palmitic acid esterification, over mesoporous analogues. This opens the way to the wider application of hierarchical catalysts in biofuel synthesis and biomass conversion.

Iqbal S.,Cardiff Catalysis Institute | Liu X.,Cardiff Catalysis Institute | Aldosari O.F.,Cardiff Catalysis Institute | Miedziak P.J.,Cardiff Catalysis Institute | And 8 more authors.
Catalysis Science and Technology | Year: 2014

The selective hydrogenation of furfuryl alcohol into 2-methylfuran was investigated at room temperature using palladium supported catalysts. We have shown that Pd-TiO2 catalysts can be very effective for the synthesis of 2-methylfuran at room temperature and low pressure of hydrogen (1-3 bar). The effect of various reaction conditions (pressure, catalyst amount, and solvent) was studied. © 2014 the Partner Organisations.

Crole D.A.,Cardiff Catalysis Institute | Freakley S.J.,Cardiff Catalysis Institute | Edwards J.K.,Cardiff Catalysis Institute | Hutchings G.J.,Cardiff Catalysis Institute
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences | Year: 2016

The direct synthesis of hydrogen peroxide (H2O2) from hydrogen and oxygen has been studied using an Au-Pd/TiO2 catalyst. The aim of this study is to understand the balance of synthesis and sequential degradation reactions using an aqueous, stabilizerfree solvent at ambient temperature. The effects of the reaction conditions on the productivity of H2O2 formation and the undesirable hydrogenation and decomposition reactions are investigated. Reaction temperature, solvent composition and reaction time have been studied and indicate that when using water as the solvent the H2O2 decomposition reaction is the predominant degradation pathway, which provides new challenges for catalyst design, which has previously focused on minimizing the subsequent hydrogenation reaction. This is of importance for the application of this catalytic approach for water purification. © 2016 The Author(s).

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