Innovative catalyst design for the oxygen reduction reaction for fuel cells
A combination of chemical and electrochemical catalysis is introduced herein as a new approach to overcome one of the most challenging and persistent issues in fuel cell cathodes. Demonstrated using hematite (a-Fe2O3) nanoparticles modified glassy carbon electrode, this bifunctional fuel cell cataly...
| Main Authors: | , , |
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| Format: | Journal article |
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Royal Society of Chemistry
2016
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| _version_ | 1826277730498379776 |
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| author | Shimizu, K Sepunaru, L Compton, R |
| author_facet | Shimizu, K Sepunaru, L Compton, R |
| author_sort | Shimizu, K |
| collection | OXFORD |
| description | A combination of chemical and electrochemical catalysis is introduced herein as a new approach to overcome one of the most challenging and persistent issues in fuel cell cathodes. Demonstrated using hematite (a-Fe2O3) nanoparticles modified glassy carbon electrode, this bifunctional fuel cell catalyst system prevails the slow kinetics of the oxygen reduction reaction by rapid heterogeneous disproportionation of hydrogen peroxide. Whilst the catalytic efficiency of glassy carbon is limited to the two-electron reduction of oxygen, modification with hematite drastically improves it to equivalent to the four-electron pathway. This is due to regeneration of the cathodic fuel through the rapid decomposition of hydrogen peroxide. The importance of such system is stressed as the formation of water rather than hydrogen peroxide is essential to maximize the energy output of the fuel cell. Cycling of oxygen reduction/regeneration boosts the activity of a low-cost catalyst to be comparable to that of platinum and concurrently reduces the risk of cell degradation. |
| first_indexed | 2024-03-06T23:33:18Z |
| format | Journal article |
| id | oxford-uuid:6ccad9e9-0bdd-4c90-8278-bc8c91a321da |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:33:18Z |
| publishDate | 2016 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:6ccad9e9-0bdd-4c90-8278-bc8c91a321da2022-03-26T19:13:26ZInnovative catalyst design for the oxygen reduction reaction for fuel cellsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6ccad9e9-0bdd-4c90-8278-bc8c91a321daSymplectic Elements at OxfordRoyal Society of Chemistry2016Shimizu, KSepunaru, LCompton, RA combination of chemical and electrochemical catalysis is introduced herein as a new approach to overcome one of the most challenging and persistent issues in fuel cell cathodes. Demonstrated using hematite (a-Fe2O3) nanoparticles modified glassy carbon electrode, this bifunctional fuel cell catalyst system prevails the slow kinetics of the oxygen reduction reaction by rapid heterogeneous disproportionation of hydrogen peroxide. Whilst the catalytic efficiency of glassy carbon is limited to the two-electron reduction of oxygen, modification with hematite drastically improves it to equivalent to the four-electron pathway. This is due to regeneration of the cathodic fuel through the rapid decomposition of hydrogen peroxide. The importance of such system is stressed as the formation of water rather than hydrogen peroxide is essential to maximize the energy output of the fuel cell. Cycling of oxygen reduction/regeneration boosts the activity of a low-cost catalyst to be comparable to that of platinum and concurrently reduces the risk of cell degradation. |
| spellingShingle | Shimizu, K Sepunaru, L Compton, R Innovative catalyst design for the oxygen reduction reaction for fuel cells |
| title | Innovative catalyst design for the oxygen reduction reaction for fuel cells |
| title_full | Innovative catalyst design for the oxygen reduction reaction for fuel cells |
| title_fullStr | Innovative catalyst design for the oxygen reduction reaction for fuel cells |
| title_full_unstemmed | Innovative catalyst design for the oxygen reduction reaction for fuel cells |
| title_short | Innovative catalyst design for the oxygen reduction reaction for fuel cells |
| title_sort | innovative catalyst design for the oxygen reduction reaction for fuel cells |
| work_keys_str_mv | AT shimizuk innovativecatalystdesignfortheoxygenreductionreactionforfuelcells AT sepunarul innovativecatalystdesignfortheoxygenreductionreactionforfuelcells AT comptonr innovativecatalystdesignfortheoxygenreductionreactionforfuelcells |