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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Nanostructured Pd/Sb2O3: A new and promising fuel cell electrocatalyst and non-enzymatic amperometric sensor for ethanol

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Author(s):
Goncalves, Rosana A. [1] ; Baldan, Mauricio R. [2] ; Ciapina, Eduardo G. [1] ; Berengue, Olivia M. [1]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ UNESP, Sch Engn, Dept Phys & Chem, BR-12516410 Guaratingueta, SP - Brazil
[2] Natl Inst Space Res INPE, PDM3A Dept Space Engn & Technol, BR-12227010 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Applied Surface Science; v. 491, p. 9-15, OCT 15 2019.
Web of Science Citations: 0
Abstract

This manuscript describes the synthesis and structural/morphological characterization of Sb2O3 nanostructures modified by Pd nanoparticles and its use as a Fuel Cells electrocatalyst and as non-enzymatic amperometric sensor for ethanol. Interesting Sb2O3 surface modifications due to Pd nanoparticles were observed, such as the loss of spherical shape and the appearance of superficial pores. As an electrocatalyst Pd/Sb2O3 exhibited two times higher catalytic activity at a constant potential than carbon-supported Pd nanoparticles to oxidize ethanol in alkaline media (current densities of 348 mu A cm(-2) and 165 mu A cm(-2) at-0.3 V vs. Ag/AgCl 3.0 M, respectively). To the extent of our knowledge this result is the first one describing such an enhancement of the Pd activity only by means of alteration of the support. Moreover, as an amperometric sensor for ethanol, the electrode showed a linear response in a broad range of concentrations with a detection limit of 0.10 mu M and sensitivity between of 1.47 to 1.00 mu AmM-1 cm(-2). The combined findings presented in this work revealed Pd/Sb2O3 can be a promising material for Direct Ethanol Fuel Cells and as a non-enzymatic amperometric sensor for ethanol. (AU)

FAPESP's process: 15/21816-4 - Growth of semiconductor nanostructures based on tin and antimony oxides: study of structural and electronic transport properties
Grantee:Olivia Maria Berengue
Support type: Regular Research Grants