多孔性碳材傳統上多利用於觸媒載體，由於其多孔特性可增加承載面積及分散觸媒，避免觸媒顆粒聚集擴大，因此廣用於擔載貴重金屬觸媒。本研究主要探討多孔性碳材應用於質子交換膜燃料電池觸媒層上的製程與其活性表面積表現。論文中討論: (1)不同參數以降低矽微粒粒徑(2)以不同方式排列矽微粒於碳紙上 (3)不同碳化前驅物所作出的碳材結構(4)不同粒徑的矽微粒所作出的碳材比表面積及孔徑分析(5)不同參數所還原的鉑顆粒粒徑與活性表面積 本研究結果顯示，藉由改變甲醇能順利降低矽微粒粒徑，製備粒徑範圍可由6nm至450nm；在矽微粒方面排列以熱乾燥法能使矽微粒有較好的排列情況；碳化前驅物則使用甲醛苯酚樹脂所作出的結構比使用葡萄糖或蔗糖的結構堅固且完整；碳材比表面積部分，大孔徑的碳材因具有相當高的微孔結構，因此比表面積可達2393m2/g，而就改變參數討論活性表面積與觸媒顆粒部份，實驗中最佳的活性表面積為14.4m2/g，而粒徑由TEM觀察，大部分皆在5nm以下。 Porous carbons are frequently used as the catalyst support due to their high porosity. They have large surface area for catalyst support. The supported catalysts usually also have good dispersion. Porous carbons are therefore suitable for supporting noble catalysts. This study focused on the preparation process and the resulting specific surface area of porous carbons as applied as the catalyst support for the proton exchange membrane fuel cells. The primary focuses include: (a) the effects of various process parameters on the size of silica particles, (b) effects of various process parameters on the orderness of silica particle array on the carbon paper, (c) effects of different carbonization precursor on the carbonized structure of the resulting mesoporous carbons, (d) the effects of the silica particle size on specific surface area of the resulting mesoporous carbons, and (e) the effects of various process parameters on the size of platinum particles and their specific surface area. The results show that by changing the amount of methanol used, we can obtain silica particles of sizes ranging from 450 nm to 6 nm. Using thermal drying method leads to better silica particle array. Phenol formaldehyde resin is a better carbonization precursor than glucose or sucrose for the present process. The structure of the resulting mesoporous carbon is stronger and more complete, and the specific surface area can reach 2393 m2/g. Finally, the particle size of the deposited platinum is approximately between 2 and 5 nm, and the best specific surface area of the platinum catalyst is 14.4 m2 / g. Key words: fuel cell, silica particle, porous carbon, catalyst layer
