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Understanding nanoparticle porosity via nanoimpacts and XPS: electro-oxidation of platinum nanoparticle aggregates

Abstract:

The porosity of platinum nanoparticle aggregates (PtNPs) is investigated electrochemically via particle-electrode impacts and by XPS. The mean charge per oxidative transient is measured from nanoimpacts; XPS shows the formation of PtO and PtO2 in relative amounts defined by the electrode potential and an average oxidation state is deduced as a function of potential. The number of platinum atoms oxidised per PtNP is calculated and compared with two models: solid and porous spheres, within whic...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted Manuscript

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Publisher copy:
10.1039/C7CP01737E

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Department:
Oxford, MPLS, Chemistry, Physical & Theoretical Chem
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Department:
Oxford, MPLS, Chemistry, Physical & Theoretical Chem
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Department:
Oxford, MPLS, Chemistry, Physical & Theoretical Chem
Palgrave, RG More by this author
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Department:
Oxford, MPLS, Materials
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Publisher:
Royal Society of Chemistry Publisher's website
Journal:
Physical Chemistry Chemical Physics Journal website
Volume:
19
Issue:
21
Pages:
13547-13552
Publication date:
2017-05-10
Acceptance date:
2017-05-09
DOI:
EISSN:
1463-9084
ISSN:
1463-9076
Pubs id:
pubs:693918
URN:
uri:a31f4005-85fa-4fd9-9949-7d5c191b9786
UUID:
uuid:a31f4005-85fa-4fd9-9949-7d5c191b9786
Local pid:
pubs:693918
Paper number:
21

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