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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.)

PEM fuel cells fed by hydrogen from ethanol dehydrogenation reaction: Unveiling the poisoning mechanisms of the by-products

Full text
Author(s):
Biancolli, Ana Laura G. [1, 2] ; Lopes, Thiago [1, 3] ; Paganin, Valdecir A. [1] ; Ticianelli, Edson A. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Inst Chem IQSC, Ave Trabalhador Saocarlense 400, BR-13560970 Sao Carlos, SP - Brazil
[2] Nucl & Energy Res Inst IPEN, Ave Prof Lineu Prestes 2242 Butanta, BR-05508000 Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Escola Politecn, Ave Prof Mello Moraes 2231, BR-05508030 Sao Paulo, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Electrochimica Acta; v. 355, SEP 20 2020.
Web of Science Citations: 0
Abstract

This work investigates the influence of hydrogen contaminated with the main by-products of the ethanol dehydrogenation reaction, i.e. ethyl acetate, acetaldehyde and unreacted ethanol, on the anode performance of a proton exchange membrane fuel cell employing different catalysts, aiming at understanding and minimizing the efficiency losses caused by these molecules. Pt-W/C and Pt-Sn/C catalysts were investigated, having Pt/C as reference, which were chosen due their ability to oxidize small organic molecules without breaking of C-C bonds and without producing strong poisoning intermediates (i.e. less prone to have its active sites blocked by side reactions). Results evidence that anode catalysts that presents lower activity for small organic molecules oxidation and/or weaker reactant adsorption, which is the case of Pt-Sn/C, are best suited for PEMFC systems directly fed by hydrogen from ethanol dehydrogenation reaction. It is also found that crossover of the considered by-products from the anode towards the cathode also has a major impact on fuel cell efficiency losses. (c) 2020 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 16/13277-9 - Radiation-grafted anion-exchange membrane for alkaline fuel cells
Grantee:Ana Laura Gonçalves Biancolli
Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
FAPESP's process: 14/22130-6 - Electrocatalysis beyond platinum: development of sustainable electrocatalysts
Grantee:Thiago Lopes
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 15/09210-3 - Influence of the ethanol dehydrogenation by-products in the kinetics of hydrogen oxidation reaction in acid and alkaline electrolytes
Grantee:Ana Laura Gonçalves Biancolli
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion
Grantee:Edson Antonio Ticianelli
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/15304-6 - Electrocatalysis beyond platinum: development of sustainable electrocatalysts
Grantee:Thiago Lopes
Support Opportunities: Scholarships in Brazil - Young Researchers