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A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine

Anupam Yadav, Richa Pandey, Ting-Wei Liao, Vyacheslav S. Zharinov, Kuo-Juei Hu, Jerome Vernieres, Richard Palmer Orcid Logo, Peter Lievens, Didier Grandjean, Yosi Shacham-Diamand

Nanoscale, Volume: 12, Issue: 10, Pages: 6047 - 6056

Swansea University Authors: Jerome Vernieres, Richard Palmer Orcid Logo

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DOI (Published version): 10.1039/c9nr09730a

Abstract

We report a new approach to design flexible functional material platforms based on electropolymerized polyaniline (PANI) polymer nanofilms modified with bimetallic nanoclusters (NCs) for efficient electro-oxidation of small organic molecules. Composition defined ligand free Pt0.75Ni0.25 NCs were syn...

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Published in: Nanoscale
ISSN: 2040-3364 2040-3372
Published: Royal Society of Chemistry (RSC) 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa53863
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spelling 2021-09-21T15:54:43.5122769 v2 53863 2020-03-25 A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine 53706ee4229ff15c98713442422ecd4b Jerome Vernieres Jerome Vernieres true false 6ae369618efc7424d9774377536ea519 0000-0001-8728-8083 Richard Palmer Richard Palmer true false 2020-03-25 EEN We report a new approach to design flexible functional material platforms based on electropolymerized polyaniline (PANI) polymer nanofilms modified with bimetallic nanoclusters (NCs) for efficient electro-oxidation of small organic molecules. Composition defined ligand free Pt0.75Ni0.25 NCs were synthesized in the gas phase using the Cluster Beam Deposition (CBD) technology and characterized using RToF, HAADF-STEM, XAFS and XPS. NCs were then directly deposited on PANI coated templates to construct electrodes. Dopamine (DP) molecules were used as a representative organic analyte and the influence of the NC-PANI hybrid atomistic structure on the electrochemical and electrocatalytic performance was investigated. The as prepared, nearly monodispersed, Pt0.75Ni0.25 NCs of ca. 2 nm diameter featuring a PtOx surface combined with a shallow platelet-like Ni–O(OH) phase formed a densely packed active surface on PANI at ultralow metal coverages. Electrochemical measurements (EIS and CV) show a 2.5 times decrease in charge transfer resistance and a remarkable 6-fold increase at lower potential in the mass activity for Pt0.75Ni0.25 NCs in comparison with their pure Pt counterparts. The enhanced electrochemical performance of the Pt0.75Ni0.25 NC hybrid’s interface is ascribed to the formation of mixed Pt metal and Ni–O(OH) phases at the surface of the alloyed PtNi cores of the bimetallic NCs under electrochemical conditions combined with an efficient charge conduction pathway between NCs. Journal Article Nanoscale 12 10 6047 6056 Royal Society of Chemistry (RSC) 2040-3364 2040-3372 14 3 2020 2020-03-14 10.1039/c9nr09730a COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2021-09-21T15:54:43.5122769 2020-03-25T11:35:15.0976632 Professional Services ISS - Uncategorised Anupam Yadav 1 Richa Pandey 2 Ting-Wei Liao 3 Vyacheslav S. Zharinov 4 Kuo-Juei Hu 5 Jerome Vernieres 6 Richard Palmer 0000-0001-8728-8083 7 Peter Lievens 8 Didier Grandjean 9 Yosi Shacham-Diamand 10 53863__16920__3f4ef0d6f154455fb3f0b68211fbe2a1.pdf 53863.pdf 2020-03-25T13:28:52.1371624 Output 2878140 application/pdf Accepted Manuscript true 2021-02-17T00:00:00.0000000 true eng
title A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine
spellingShingle A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine
Jerome Vernieres
Richard Palmer
title_short A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine
title_full A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine
title_fullStr A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine
title_full_unstemmed A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine
title_sort A platinum–nickel bimetallic nanocluster ensemble-on-polyaniline nanofilm for enhanced electrocatalytic oxidation of dopamine
author_id_str_mv 53706ee4229ff15c98713442422ecd4b
6ae369618efc7424d9774377536ea519
author_id_fullname_str_mv 53706ee4229ff15c98713442422ecd4b_***_Jerome Vernieres
6ae369618efc7424d9774377536ea519_***_Richard Palmer
author Jerome Vernieres
Richard Palmer
author2 Anupam Yadav
Richa Pandey
Ting-Wei Liao
Vyacheslav S. Zharinov
Kuo-Juei Hu
Jerome Vernieres
Richard Palmer
Peter Lievens
Didier Grandjean
Yosi Shacham-Diamand
format Journal article
container_title Nanoscale
container_volume 12
container_issue 10
container_start_page 6047
publishDate 2020
institution Swansea University
issn 2040-3364
2040-3372
doi_str_mv 10.1039/c9nr09730a
publisher Royal Society of Chemistry (RSC)
college_str Professional Services
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hierarchy_top_title Professional Services
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hierarchy_parent_title Professional Services
department_str ISS - Uncategorised{{{_:::_}}}Professional Services{{{_:::_}}}ISS - Uncategorised
document_store_str 1
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description We report a new approach to design flexible functional material platforms based on electropolymerized polyaniline (PANI) polymer nanofilms modified with bimetallic nanoclusters (NCs) for efficient electro-oxidation of small organic molecules. Composition defined ligand free Pt0.75Ni0.25 NCs were synthesized in the gas phase using the Cluster Beam Deposition (CBD) technology and characterized using RToF, HAADF-STEM, XAFS and XPS. NCs were then directly deposited on PANI coated templates to construct electrodes. Dopamine (DP) molecules were used as a representative organic analyte and the influence of the NC-PANI hybrid atomistic structure on the electrochemical and electrocatalytic performance was investigated. The as prepared, nearly monodispersed, Pt0.75Ni0.25 NCs of ca. 2 nm diameter featuring a PtOx surface combined with a shallow platelet-like Ni–O(OH) phase formed a densely packed active surface on PANI at ultralow metal coverages. Electrochemical measurements (EIS and CV) show a 2.5 times decrease in charge transfer resistance and a remarkable 6-fold increase at lower potential in the mass activity for Pt0.75Ni0.25 NCs in comparison with their pure Pt counterparts. The enhanced electrochemical performance of the Pt0.75Ni0.25 NC hybrid’s interface is ascribed to the formation of mixed Pt metal and Ni–O(OH) phases at the surface of the alloyed PtNi cores of the bimetallic NCs under electrochemical conditions combined with an efficient charge conduction pathway between NCs.
published_date 2020-03-14T04:07:03Z
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score 10.970095

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