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

Nanoscale
Anupam YadavYosi Shacham-Diamand

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 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...Continue Reading

References

Mar 15, 1991·Physical Review. B, Condensed Matter·E ChoiM Choi
Jul 21, 2004·Journal of Synchrotron Radiation·M BorsboomE Vlieg
Apr 19, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Xiaomiao FengJun-Jie Zhu
Oct 31, 2008·Talanta·Kathleen GrennanMalcolm R Smyth
Nov 7, 2008·Accounts of Chemical Research·Dan LiRichard B Kaner
Nov 30, 2010·Biosensors & Bioelectronics·Chetna DhandB D Malhotra
Apr 13, 2011·ACS Applied Materials & Interfaces·Shadi JafarzadehPer M Claesson
Jul 14, 2011·Journal of the American Chemical Society·Wei GaoJoseph Wang
Dec 15, 2015·ACS Applied Materials & Interfaces·Una BogdanovicVesna V Vodnik
Dec 9, 2017·Biosensors & Bioelectronics·Jong-Min MoonYoon-Bo Shim
Apr 10, 2018·Chemical Reviews·Jorge G IbanezBernardo A Frontana-Uribe
Apr 23, 2017·Polymers·Thanh-Hai LeHyeonseok Yoon

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Citations

Feb 9, 2021·Small·Anupam YadavPeter Lievens

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Methods Mentioned

BETA
biosensors
transmission
X-ray
scanning electron microscopy
Scanning Transmission Electron Microscopy
quartz crystal microbalance

Software Mentioned

CasaXPS
EXBROOK

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