4-1 結論
大體而言，我們的實驗結果如同前面文獻，金屬粒子在尺寸縮小之後，能夠 提昇氧化能力及斷碳－碳鍵的能力。
對於奈米金屬對於乙醇催化反應的應用上，Ag、Pd 雖可增加氧化能力，但 同時斷碳－碳鍵的能力也會提昇，而降低 CH3CHO 的選擇率。而 Pt 則是能夠提 昇 CH3CHO 的選擇率，但同時 CO 的選擇率也會上升。Au 則是不僅能夠提昇
CH3CHO 的選擇率，同時也能降低 C2H4的選擇率，經奈米化之後得成為乙醇氧 化反應之理想催化劑。
4-2 未來研究方向
然而，本篇論文所合成出的金屬奈米粒子大小未達多數研究的討論尺寸範圍，
粒徑分佈的控制未至均一，重以在高溫鍛燒或高溫反應之後，金屬粒子易於發生 凝聚的現象，對於氣態乙醇氧化反應仍有待突破。或者相關結果可應用於其他領 域，如電催化、CO 氧化反應等。
或者能改變金屬構型，合成以(111)表面為主的奈米粒子，能同時增加反應表 面積，並能減少表面的 step sites，避免斷碳－碳鍵的反應發生，而得到較高產率 的乙醛。
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