Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 박융호 | - |
dc.contributor.author | 이상영 | - |
dc.date.accessioned | 2020-04-03T16:52:23Z | - |
dc.date.available | 2020-04-03T16:52:23Z | - |
dc.date.issued | 2009-02 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/144871 | - |
dc.identifier.uri | http://hanyang.dcollection.net/common/orgView/200000410850 | en_US |
dc.description.abstract | PEMFC의 전극 촉매인 백금을 대체하고자, 백금과 비슷한 물성을 보이는 molybdenum carbide를 CNT에 담지하여 촉매를 제조하였다. 촉매 제조의 공정변수로서, 산 처리 시간, 지지체의 종류, 전구체 종류, 지지체와 전구체의 비율, carburization의 시간에 대한 촉매의 특성을 XRD, ICP-AES, TEM을 통해 분석하였고 전기화학적 활성을 연구하였다. 1시간동안 CNT를 혼산 처리한 경우 담지효율이 높고 전기화학적으로 높은 활성을 보였다. 지지체의 종류로는 Mo₂C/VC에 비해 산 처리 된 Mo₂C/CNT의 담지효율이 높고 전기화학적으로 높을 활성을 보였다. 전구체로는 담지효율은 ammonium molybate가 높았으나 전기화학적 특성은 담지효율이 낮은 molybdenum dioxy acetylacetonante와 ammonium molybdated가 비슷한 결과를 나타냈다. 전구체와 지지체의 비율에 있어서는 전구체가 지지체보다 많으면 입자의 형성을 방해하고 담지효율이 떨어졌다. Carburization 시간이 길어지면 입자의 크기가 작아지며 담지효율도 낮아졌다. 높은 전기화학적 활성을 보인 Mo₂C/CNT를 선정하여 소량의 Pt를 첨가하여 환원법으로 Pt-Mo₂C/CNT를 제조하였고, 전기화학적 활성측정과 단위전지 실험을 실시하였다. Cathode에 30% Pt/C와 anode에 Mo₂C/CNT를 이용한 MEA는 anode의 전기화학적 활성이 낮아 단위전지 성능측정을 할 수 없었다. 하지만 Pt-Mo₂C/CNT로 만든 MEA는 상용 MEA와 비교하여 air에서 Pt 함유량이 약 2~4배 차이를 보이는 상용MEA와 유사한 성능을 보여 Mo₂C의 효과를 찾을 수 있었다.; Molybdenum carbide which was known to have similar properties to those of platinum, was supported on Multi Wall Nano Tube(MWNT) to prepare the catalyst that can replace Pt in PEMFC. The parameters of catalyst preparation such as acid treatment time, type of support, type of precursor, precursor to support ratio, and time of carburization were varied to find the optimum condition for catalyst preparation. The prepared catalysts were characterized using XRD, TEM and ICP-AES and their electrochemical activity was also evaluated by half and single cell. The catalyst prepared with acid treated of MWNT for 1h showed higher loading efficiency and electrochemical activity than those of other catalyst. Regarding support types, an acid treated CNT showed higher loading efficiency and electrochemical activity than VC. Among precursors, the loading efficiency of ammonium molybdate was higher than that of molybdenum dioxy acetylacetonate, but their electrochemical activities were similar. For the ratio of precursor to support, a large amount of precursor suppressed the forming of particles and decreased the loading efficiency. When catalyst was carburized for a long time, its particle size was smaller and loading efficiency was lower. Pt-Mo₂C/CNT was prepared by adding small amount of Pt on Mo₂C/CNT that showed the best electrochemical activity. The characterization and electrochemical activity of Pt-Mo₂C/CNT were investigated, and MEA made by this catalyst was tested using single cell. MEA using anode with Mo₂C/CNT and cathode with 30% Pt/C couldn't measure due to its low electrochemical activity. However, MEA prepared with Pt-Mo₂C/CNT showed a similar that of performance to commercial MEA under air atmosphere. | - |
dc.publisher | 한양대학교 | - |
dc.title | 고분자 전해질 연료전지용 Pt-Mo₂C/CNT촉매의 전기화학적 산화반응 특성 | - |
dc.title.alternative | The Characteristics of Electrochemical Oxidation over Pt-Mo₂C/CNT Catalyst for PEMFC | - |
dc.type | Theses | - |
dc.contributor.googleauthor | 이상영 | - |
dc.contributor.alternativeauthor | Lee, Sang-Young | - |
dc.sector.campus | S | - |
dc.sector.daehak | 대학원 | - |
dc.sector.department | 정밀화학공학과 | - |
dc.description.degree | Master | - |
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