研究生: |
黃柏舜 Po-Shun Huang |
---|---|
論文名稱: |
一維奈米帶模版上之鉑-釕觸媒製備及其觸媒特性之研究 Fabrication and Characterization of Pt-Ru catalysts on one dimensional nanobelts |
指導教授: |
洪儒生
Lu-sheng Hong |
口試委員: |
林麗瓊
Li-chyong Chen 蔡大翔 Dah-shyang Tsai |
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: | 2006 |
畢業學年度: | 94 |
語文別: | 中文 |
論文頁數: | 123 |
中文關鍵詞: | 奈米帶 、燃料電池 、Ru(hfac)2(CO)2 、循環伏安法 |
外文關鍵詞: | nanobelt, fuel cell, Ru(hfac)2(CO)2, cyclic voltammetry |
相關次數: | 點閱:241 下載:0 |
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本論文研究目標在於沉積鉑-釕二元金屬觸媒在一維的奈米帶上。奈米帶屬於一維的奈米結構物,但不同於奈米線或奈米柱的是具有高的深寬比,能提供廣大的單晶表面作為燃料電池中陽極觸媒方面的應用。我們使用鋅粉作為原料,利用熱氣相沉積法,在700 ℃在矽(100)晶片上長出寬約為135 nm,厚約47 nm的氧化鋅奈米帶。透過分析型穿透式電子顯微鏡鑑定,確定此奈米帶是沿[ ]方向成長,寬面為±( )晶面,側邊為±( ) 晶面。為了增加奈米帶的導電能力,將銦掺雜到氧化鋅結構中。我們在900 ℃之下,製出銦掺雜的氧化鋅奈米帶,與未掺雜前的奈米帶有相同的成長方向。經由EDS的元素分析得到銦的掺雜量約5~18 %。之後,將釕的有機金屬先驅物,雙六氟乙醯丙銅基雙羰基釕(Ru(hfac)2(CO)2)作為先驅物在400℃,利用MOCVD沉積在奈米帶上。最後,乃依不同的濺鍍時間將鉑鍍在已長好釕的一維奈米帶上,利用EDS以及ESCA的分析推算鉑在奈米帶上批覆情況;透過循環伏安法進行氫離子吸脫附在鉑活性表面以及甲醇被Pt-Ru催化的試驗,得到其觸媒特性。
This thesis is purposed to deposit Pt-Ru binary electro-catalysts on 1-D nanobelts. The nanobelts belonging to 1-D nanostructure are different from the nanowires or nanorods because they can provide large single crystalline surface for application about anode of fuel cell. We use zinc powder to fabricate ZnO nanobelts on Si(100) substrate at 700 ℃ by thermal CVD and also confirm that the nanobelts grow along [0 1 -1 0 ] direction and are enclosed by ±(2 -1 -1 0) and ±(0001) planes via AEM. In order to enhance conductivity of nanobelts, we try to dope Indium into the structure of ZnO. IZO nanobelts are fabricated at 900 ℃, with the same growth direction of undoped ZnO nanobelts. The indium content is from 5 to 18 % through EDS analysis. Then, we deposit Ruthenium on IZO or InN nanobelts using Ru(hfac)2(CO)2 as the precursor at 400 ℃ by MOCVD. Finally, we change different sputtering time of Pt onto Ru/InN nanobelts. The coverage on surface of nanobelts can be estimated by EDS and ESCA. From the information of cyclic voltammtry about hydrogen adsorption and desorption on Pt active sites and methanol catalyzed by Pt-Ru, this kind of catalytic system can be characterized.
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