研究生: |
陳力嘉 Li-Jia Chen |
---|---|
論文名稱: |
鈦釕混合氧化物擔載Pt觸媒的製備與其在電化學反應特性研究 Mixed Oxide Supported Pt Catalysts for Electrochemical Characteristic Study |
指導教授: |
林昇佃
Shawn D. Lin |
口試委員: |
黃炳照
Bing-Joe Hwang 王丞浩 Chen-Hao Wang, 王冠文 Kuan-Wen Wang |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 化學工程系 Department of Chemical Engineering |
論文出版年: | 2015 |
畢業學年度: | 103 |
語文別: | 中文 |
論文頁數: | 150 |
中文關鍵詞: | 混合氧化物載體 、水熱法 |
外文關鍵詞: | mixed oxide support, hydrothermal process |
相關次數: | 點閱:375 下載:3 |
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如今燃料電池技術日新月異,在應用端已經有相當成熟的技術,但是目前電極觸媒使用碳當作載體,然而碳載體在高電位下會有碳腐蝕問題發生,並且與白金奈米金屬粒子不具有強力的作用力(SMSI),最終將導致白金的融解,減少白金的利用率進一步導致燃料電池效率降低,本研究探討非碳載體的在陽極觸媒端運用,利用水熱法來合成雙金屬鈦釕氧化物(TixRu1-xO2) 來作探討,將探討載體經過熱處理及不同的鈦與釕合成比例的變化和結構,瞭解金屬氧化物結構對白金觸媒結構之影響,並將其應用在燃料電池陽極電催化反應上。
XRD、TEM 結果指出利用乙二醇還原法還原出來的白金粒徑大約在4到6奈米之間比商購觸媒還要略大(3.2 nm),而在電化學測試方面,而在不同比例雙金屬鈦釕氧化物(TixRu1-xO2)當載體乘載白金觸媒,以40Pt/Ti0.7Ru0.3O2和40Pt/Ti0.3Ru0.7O2 具有最佳的效果反應。
Nowadays, fuel cell technology is expected to have enormous potential for both mobile and stationary applications. The current electrode catalysts use carbon black at the support. However, the weak interactions between the carbon support and the catalytic metal nanoparticles and the corrosion of carbon eventually leads to Pt dissolution, resulting in decrease in the active surface area with long-term operation. In the study binary metal oxide (TixRu1-xO2) was synthesized by a simple hydrothermal process, a novel functionalised support for Pt.
The XRD and TEM results show that the Pt particle size of 40 wt% Pt/ TixRu1-xO2 catalyst prepared by EG method was in the range of 4-6 nm, which was slightly larger than that of commercial Pt/C and PtRu/C catalysts. The influences of CO on the electrochemical reaction The results of electrochemical analyses indicate that the prepared 40Pt/Ti0.7Ru0.3O2 and 40Pt/Ti0.3Ru0.7O2 catalysis exhibit higher intrinsic activity and better stability in the presence of CO comparing to commercial PtRu/C.
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