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Hydrogen production by photoreforming of biofuels using Au, Pd and Au–Pd/TiO2 photocatalysts

Hydrogen production by photoreforming of biofuels using Au, Pd and Au–Pd/TiO2 photocatalysts
Hydrogen production by photoreforming of biofuels using Au, Pd and Au–Pd/TiO2 photocatalysts
We have prepared a variety of Au, Pd and Au–Pd catalysts loaded onto P25 titania to determine how effective these materials are for the anaerobic, ambient temperature reforming of alcohols with water to produce hydrogen, and to examine the effect of the preparation method on their performance. Catalysts produced by both incipient wetness (IW) methods and by colloidal methods are successful materials for producing hydrogen, with the IW catalysts proving to be the best for the same metal loading. It is shown that, although gold catalysts generally have lower hydrogen yield than for Pd, alloying Au with Pd gives more active materials than either alone at the same weight loading, due to a synergistic effect. The catalysts are active for reforming a range of alcohols, generally producing CO2, H2 and an alkane. However, it is essential for good activity to have an H at the ?-position to the oxygenate function, and so, carboxylic acids and ketones do not work. These catalysts generally show a maximum in activity at low loadings of metal (?0.5 wt%) due to a requirement for maximising the active interface between the metal nanoparticles and the photo-active titania.
0021-9517
10-15
Bowker, M.
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Morton, C.
2c6cd84e-5b72-48ca-83e9-c774e807cb0e
Kennedy, J.
5cee1dd0-290d-41e5-91a6-5f3ebd3dc5bb
Bahruji, H.
bf937262-f9ba-4e18-810a-0f8cbc9e5ff4
Greves, J.
e08d6eec-f516-4eb2-bb3d-fee73e044585
Jones, W.
c18f6cea-13e4-4c34-b280-f95cf8c6dd12
Davies, P.R.
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Brookes, C.
485540de-a96e-4c26-9324-291b8cdcc80f
Wells, P.P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Dimitratos, N.
850e51dd-78da-4827-84e1-298f458450ee
Bowker, M.
8e99ffe0-6f5e-442e-a30a-158afaa3f85c
Morton, C.
2c6cd84e-5b72-48ca-83e9-c774e807cb0e
Kennedy, J.
5cee1dd0-290d-41e5-91a6-5f3ebd3dc5bb
Bahruji, H.
bf937262-f9ba-4e18-810a-0f8cbc9e5ff4
Greves, J.
e08d6eec-f516-4eb2-bb3d-fee73e044585
Jones, W.
c18f6cea-13e4-4c34-b280-f95cf8c6dd12
Davies, P.R.
1859d435-1b4e-4ed2-83c1-07298eb38742
Brookes, C.
485540de-a96e-4c26-9324-291b8cdcc80f
Wells, P.P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Dimitratos, N.
850e51dd-78da-4827-84e1-298f458450ee

Bowker, M., Morton, C., Kennedy, J., Bahruji, H., Greves, J., Jones, W., Davies, P.R., Brookes, C., Wells, P.P. and Dimitratos, N. (2014) Hydrogen production by photoreforming of biofuels using Au, Pd and Au–Pd/TiO2 photocatalysts. [in special issue: Photocatalysis and Photoelectrolysis] Journal of Catalysis, 310, 10-15. (doi:10.1016/j.jcat.2013.04.005).

Record type: Article

Abstract

We have prepared a variety of Au, Pd and Au–Pd catalysts loaded onto P25 titania to determine how effective these materials are for the anaerobic, ambient temperature reforming of alcohols with water to produce hydrogen, and to examine the effect of the preparation method on their performance. Catalysts produced by both incipient wetness (IW) methods and by colloidal methods are successful materials for producing hydrogen, with the IW catalysts proving to be the best for the same metal loading. It is shown that, although gold catalysts generally have lower hydrogen yield than for Pd, alloying Au with Pd gives more active materials than either alone at the same weight loading, due to a synergistic effect. The catalysts are active for reforming a range of alcohols, generally producing CO2, H2 and an alkane. However, it is essential for good activity to have an H at the ?-position to the oxygenate function, and so, carboxylic acids and ketones do not work. These catalysts generally show a maximum in activity at low loadings of metal (?0.5 wt%) due to a requirement for maximising the active interface between the metal nanoparticles and the photo-active titania.

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More information

Accepted/In Press date: 5 April 2013
Published date: February 2014
Organisations: Organic Chemistry: SCF

Identifiers

Local EPrints ID: 400602
URI: http://eprints.soton.ac.uk/id/eprint/400602
ISSN: 0021-9517
PURE UUID: dcad9e60-e8ff-4484-9bf9-b330b319e50e
ORCID for P.P. Wells: ORCID iD orcid.org/0000-0002-0859-9172

Catalogue record

Date deposited: 20 Sep 2016 08:56
Last modified: 15 Mar 2024 03:24

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Contributors

Author: M. Bowker
Author: C. Morton
Author: J. Kennedy
Author: H. Bahruji
Author: J. Greves
Author: W. Jones
Author: P.R. Davies
Author: C. Brookes
Author: P.P. Wells ORCID iD
Author: N. Dimitratos

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