DC Field | Value | Language |
---|---|---|
dc.contributor.author | 강승연 | - |
dc.date.accessioned | 2023-08-31T16:30:36Z | - |
dc.date.available | 2023-08-31T16:30:36Z | - |
dc.date.issued | 2023 | - |
dc.identifier.other | OAK-2015-10024 | - |
dc.identifier.uri | http://postech.dcollection.net/common/orgView/200000659691 | ko_KR |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/118221 | - |
dc.description | Master | - |
dc.description.abstract | In this paper, I have investigated that Fe2/3+ redox couple which is widely used as an n-type electrolyte, is defined as an inner-sphere electrode reaction. Therefore, there is the importance of an electrode material selection. In addition, we find that kinetics and thermopower is affected by the chaotropic of the counter-anion conjugated on active redox couple (Fe2+/3+). As a result, it was confirmed that thermopower and redox reaction kinetics of the Fe-ClO4 electrolyte were the best among various counter-anions of Fe2+/3+ redox couple. And considering the pH and operating voltage of the Fe-ClO4 electrolyte, he Fe-N-C electrode material was selected as an electrode that could replace Pt. The Pmax of the pellet-type Fe-N-C TEC was measured at 503 mW m-2, which was corresponding to the Pmax of the Pt. On the basis of the cost for Fe-N-C ($ 3,400 kg-1), just 1/750 than of Pt. Furthermore, the CV, LSV, and EIS results show that fast electron transfer of Fe-N-C like noble metal Pt. Also, the activity of the Fe-N-C electrode demonstrated in the pellet-type model test, extended surface electrodes are successfully transferred into cylindrical type TEC. The Fe-N-C coated CC electrode exhibited Pmax of 1.73 W m-2, demonstrating enhanced TEC performance using non-precious active material, Fe-N-C. Also, the power conversion efficiency relative to the Carnot cycle (ηr) of Fe-N-C based cylindrical cell can be calculated to be 1.242 %, which is the highest value in Fe2+/3+ redox couple, n-type electrolyte. Taken all together, Fe-N-C electrode for the TEC in Fe-ClO4 electrolyte can be potential for thermo-electrochemical cells. | - |
dc.language | eng | - |
dc.publisher | 포항공과대학교 | - |
dc.title | Fe-N-C electrocatalyst for enhancing iron (II/III) redox reaction kinetics in thermo-electrochemical cells | - |
dc.title.alternative | Fe II/III 산화환원 반응 속도론 향상을 위한 열 전기화학 전지 Fe N C 전기 촉매 | - |
dc.type | Thesis | - |
dc.contributor.college | 신소재공학과 | - |
dc.date.degree | 2023- 2 | - |
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