Direct sorbitol proton exchange membrane fuel cell using moderate catalyst loadings
2014 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 0019-4686, Vol. 116, 379-387 p.Article in journal (Refereed) Published
Recent progress in biomass hydrolysis has made it interesting to study the use of sorbitol for electricity generation. In this study, sorbitol and glucose are used as fuels in proton exchange membrane fuel cells having 0.9 mg cm(-2) PtRu/C at the anode and 0.3 mg cm(-2) Pt/C at the cathode. The sorbitol oxidation was found to have slower kinetics than glucose oxidation. However, at low temperatures the direct sorbitol fuel cell shows higher performance than the direct glucose fuel cell, attributed to a lower degree of catalyst poisoning. The performance of both fuel cells is considerably improved at higher temperatures. High temperatures lower the poisoning, allowing the direct glucose fuel cell to reach a higher performance than the direct sorbitol fuel cell. The mass specific peak power densities of the direct sorbitol and direct glucose fuel cells at 65 degrees C was 3.2 mW Mg-catalyst(-1) and 3.5 mW Mg-catalyst(-1), respectively. Both of these values are one order of magnitude larger than mass specific peak power densities of earlier reported direct glucose fuel cells using proton exchange membranes. Furthermore, both the fuel cells showed a considerably decrease in performance with time, which is partially attributed to sorbitol and glucose crossover poisoning the Pt/C cathode.
Place, publisher, year, edition, pages
2014. Vol. 116, 379-387 p.
Direct sorbitol fuel cell, Direct glucose fuel cell, Proton exchange membrane, Supported PtRu catalyst, Performance
Other Chemistry Topics
IdentifiersURN: urn:nbn:se:kth:diva-143457DOI: 10.1016/j.electacta.2013.11.070ISI: 000331494400052ScopusID: 2-s2.0-84889997436OAI: oai:DiVA.org:kth-143457DiVA: diva2:707667
FunderMistra - The Swedish Foundation for Strategic Environmental ResearchSwedish Research Council
QC 201403252014-03-252014-03-212014-03-25Bibliographically approved