The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

A quick and versatile one step metal–organic chemical deposition method for supported Pt and Pt-alloy catalysts

A quick and versatile one step metal–organic chemical deposition method for supported Pt and Pt-alloy catalysts
A quick and versatile one step metal–organic chemical deposition method for supported Pt and Pt-alloy catalysts
A simple, modified Metal–Organic Chemical Deposition (MOCD) method for Pt, PtRu and PtCo nanoparticle deposition onto a variety of support materials, including C, SiC, B4C, LaB6, TiB2, TiN and a ceramic/carbon nanofiber, is described. Pt deposition using Pt(acac)2 as a precursor is shown to occur via a mixed solid/liquid/vapour precursor phase which results in a high Pt yield of 90–92% on the support material. Pt and Pt alloy nanoparticles range 1.5–6.2 nm, and are well dispersed on all support materials, in a one-step method, with a total catalyst preparation time of ∼10 hours (2.4–4× quicker than conventional methods). The MOCD preparation method includes moderate temperatures of 350 °C in a tubular furnace with an inert gas supply at 2 bar, a high pressure (2–4 bar) compared to typical MOCVD methods (∼0.02–10 mbar). Pt/C catalysts with Pt loadings of 20, 40 and 60 wt% were synthesised, physically characterised, electrochemically characterised and compared to commercial Pt/C catalysts. TEM, XRD and ex situ EXAFS show similar Pt particle sizes and Pt particle shape identifiers, namely the ratio of the third to first Pt coordination numbers modelled from ex situ EXAFS, between the MOCD prepared catalysts and commercial catalysts. Moreover, electrochemical characterisation of the Pt/C MOCD catalysts obtained ORR mass activities with a maximum of 428 A gPt−1 at 0.9 V, which has similar mass activities to the commercial catalysts (80–160% compared to the commercial Pt/C catalysts).
2046-2069
19982–19996
Jackson, Colleen
b7103fbb-32bf-4abb-849e-fec3ecc878d6
Smith, Graham T.
b84ea295-4b63-4bf5-b9a1-b86a5ef86af2
Mpofu, Nobuhle
1d59fa60-b523-459f-bb78-2fbcea429fbe
Dawson, Jack M.S.
3b57eb78-4e38-4b6e-ae4c-9c9df5310ff5
Khoza, Thulile
a5c07b99-7bce-4f08-a76f-6061bf4ec450
September, Caelin
2df06869-72a3-4d80-a996-7f00c6ab91cb
Taylor, Susan M.
fe950a9c-7d8f-4179-a774-ca364d2d5144
Inwood, David W.
5364f809-b866-45aa-8b43-3db6113fb0e6
Leach, Andrew
eb2fee87-ab58-4a28-9319-529de90d1708
Kramer, Denis
1faae37a-fab7-4edd-99ee-ae4c30d3cde4
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Kucernak, Anthony R.
3a0f1914-9ef6-40dc-87df-38aba7e4ceaf
Levecque, Pieter
eb987b8a-69a3-49d5-98b8-532d4c7d7a19
Jackson, Colleen
b7103fbb-32bf-4abb-849e-fec3ecc878d6
Smith, Graham T.
b84ea295-4b63-4bf5-b9a1-b86a5ef86af2
Mpofu, Nobuhle
1d59fa60-b523-459f-bb78-2fbcea429fbe
Dawson, Jack M.S.
3b57eb78-4e38-4b6e-ae4c-9c9df5310ff5
Khoza, Thulile
a5c07b99-7bce-4f08-a76f-6061bf4ec450
September, Caelin
2df06869-72a3-4d80-a996-7f00c6ab91cb
Taylor, Susan M.
fe950a9c-7d8f-4179-a774-ca364d2d5144
Inwood, David W.
5364f809-b866-45aa-8b43-3db6113fb0e6
Leach, Andrew
eb2fee87-ab58-4a28-9319-529de90d1708
Kramer, Denis
1faae37a-fab7-4edd-99ee-ae4c30d3cde4
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Kucernak, Anthony R.
3a0f1914-9ef6-40dc-87df-38aba7e4ceaf
Levecque, Pieter
eb987b8a-69a3-49d5-98b8-532d4c7d7a19

Jackson, Colleen, Smith, Graham T., Mpofu, Nobuhle, Dawson, Jack M.S., Khoza, Thulile, September, Caelin, Taylor, Susan M., Inwood, David W., Leach, Andrew, Kramer, Denis, Russell, Andrea E., Kucernak, Anthony R. and Levecque, Pieter (2020) A quick and versatile one step metal–organic chemical deposition method for supported Pt and Pt-alloy catalysts. RSC Advances, 2020 (34), 19982–19996. (doi:10.1039/D0RA03001E).

Record type: Article

Abstract

A simple, modified Metal–Organic Chemical Deposition (MOCD) method for Pt, PtRu and PtCo nanoparticle deposition onto a variety of support materials, including C, SiC, B4C, LaB6, TiB2, TiN and a ceramic/carbon nanofiber, is described. Pt deposition using Pt(acac)2 as a precursor is shown to occur via a mixed solid/liquid/vapour precursor phase which results in a high Pt yield of 90–92% on the support material. Pt and Pt alloy nanoparticles range 1.5–6.2 nm, and are well dispersed on all support materials, in a one-step method, with a total catalyst preparation time of ∼10 hours (2.4–4× quicker than conventional methods). The MOCD preparation method includes moderate temperatures of 350 °C in a tubular furnace with an inert gas supply at 2 bar, a high pressure (2–4 bar) compared to typical MOCVD methods (∼0.02–10 mbar). Pt/C catalysts with Pt loadings of 20, 40 and 60 wt% were synthesised, physically characterised, electrochemically characterised and compared to commercial Pt/C catalysts. TEM, XRD and ex situ EXAFS show similar Pt particle sizes and Pt particle shape identifiers, namely the ratio of the third to first Pt coordination numbers modelled from ex situ EXAFS, between the MOCD prepared catalysts and commercial catalysts. Moreover, electrochemical characterisation of the Pt/C MOCD catalysts obtained ORR mass activities with a maximum of 428 A gPt−1 at 0.9 V, which has similar mass activities to the commercial catalysts (80–160% compared to the commercial Pt/C catalysts).

Text
RSC Adv 2020 MOCD - Version of Record
Download (1MB)

More information

Accepted/In Press date: 20 May 2020
e-pub ahead of print date: 27 May 2020

Identifiers

Local EPrints ID: 441082
URI: http://eprints.soton.ac.uk/id/eprint/441082
ISSN: 2046-2069
PURE UUID: cd7621de-fb4a-4c38-a9ac-0ad0a0407212
ORCID for Andrea E. Russell: ORCID iD orcid.org/0000-0002-8382-6443

Catalogue record

Date deposited: 29 May 2020 16:31
Last modified: 26 Nov 2021 02:40

Export record

Altmetrics

Contributors

Author: Colleen Jackson
Author: Graham T. Smith
Author: Nobuhle Mpofu
Author: Jack M.S. Dawson
Author: Thulile Khoza
Author: Caelin September
Author: Susan M. Taylor
Author: David W. Inwood
Author: Andrew Leach
Author: Denis Kramer
Author: Anthony R. Kucernak
Author: Pieter Levecque

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×