Next Article in Journal
New Antioxidant Multilayer Packaging with Nanoselenium to Enhance the Shelf-Life of Market Food Products
Next Article in Special Issue
Linear Birefringent Films of Cellulose Nanocrystals Produced by Dip-Coating
Previous Article in Journal
Fabrication of ZnO/Red Phosphorus Heterostructure for Effective Photocatalytic H2 Evolution from Water Splitting
Previous Article in Special Issue
On the Structure of Ultrathin FeO Films on Ag(111)
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessArticle
Nanomaterials 2018, 8(10), 836; https://doi.org/10.3390/nano8100836

Ultra-Thin Platinum Deposits by Surface-Limited Redox Replacement of Tellurium

1
Institute Charles Gerhardt of Montpellier, UMR CNRS 5253, Chalcogenide Materials and Glasses, University of Montpellier, F-34095 Montpellier CEDEX 5, France
2
Institute Charles Gerhardt of Montpellier, UMR CNRS 5253, Aggregates Interfaces and Materials for Energy, University of Montpellier, F-34095 Montpellier CEDEX 5, France
3
Aix-Marseille University, University of Toulon, CNRS, IM2NP, av. Normandie-Niemen, F-13013 Marseille, France
*
Author to whom correspondence should be addressed.
Received: 15 September 2018 / Revised: 7 October 2018 / Accepted: 12 October 2018 / Published: 15 October 2018
(This article belongs to the Special Issue Design and Development of Nanostructured Thin Films)
Full-Text   |   PDF [2654 KB, uploaded 15 October 2018]   |  

Abstract

Platinum is the most employed electrocatalyst for the reactions taking place in energy converters, such as the oxygen reduction reaction in proton exchange membrane fuel cells, despite being a very low abundant element in the earth’s crust and thus extremely expensive. The search for more active electrocatalysts with ultra-low Pt loading is thus a very active field of investigation. Here, surface-limited redox replacement (SLRR) that utilizes the monolayer-limited nature of underpotential deposition (UPD) was used to prepare ultrathin deposits of Pt, using Te as sacrificial metal. Cyclic voltammetry and anodic potentiodynamic scanning experiments have been performed to determine the optimal deposition conditions. Physicochemical and electrochemical characterization of the deposited Pt was carried out. The deposit comprises a series of contiguous Pt islands that form along the grain interfaces of the Au substrate. The electrochemical surface area (ECSA) of the Pt deposit obtained after 5 replacements, estimated to be 18 m2/g, is in agreement with the ECSA of extended surface catalysts on flat surfaces. View Full-Text
Keywords: Pt thin deposits; galvanic displacement; UPD; SLRR; electrocatalysis Pt thin deposits; galvanic displacement; UPD; SLRR; electrocatalysis
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Haidar, F.; Maas, M.; Piarristeguy, A.; Pradel, A.; Cavaliere, S.; Record, M.-C. Ultra-Thin Platinum Deposits by Surface-Limited Redox Replacement of Tellurium. Nanomaterials 2018, 8, 836.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Nanomaterials EISSN 2079-4991 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top