本研究分為兩階段，第一階段研究以濕式化學還原法，使用NaBH4作為還原劑，在活性碳上成長出五種不同銅比例之鈷鈀銅三層式奈米顆粒，樣品中鈷鈀金屬莫爾比為1:1，銅金屬原子則為鈷原子之0.025、0.05、0.1、0.2、0.3，所製作之樣品分別命名為CPC0025、CPC005、CPC01、CPC02及CPC03。由電化學分析推定其表面組成與電性後，使用X光光電子能譜與高解析穿透式電子顯微鏡進一步確認表面組成，再以X光吸收光譜與X光繞射儀分析其局部結構，如:化學態、有序性及周圍環境等，最後使用氣相層析儀進行分析，判斷其作為二氧化碳還原反應奈米觸媒之應用性。
第二階段以1 mJ/pluse及10 mJ/pluse次毫秒雷射退火對CPC0025、CPC01及CPC03進行退火。實驗結果顯示不同能量的雷射使原子能夠移動的距離不同，在1 mJ/pluse雷射退火後表面的銅原子分散幫助鈷與鈀原子的金屬態增加，銅自身的氧化態增加，同時鈀原子的有序性得到提升；10 mJ/pluse雷射退火後表面的銅原子則會產生聚集，鈷與鈀原子會再次氧化，銅自身的金屬態上升，由於得到更大的能量鈀原子排列能夠變得更加整齊。更高比例銅原子使上述效應影響更大，更厚的銅原子則需要更高能量的退火才能將氧化銅還原為金屬。作為二氧化碳還原奈米觸媒的應用，CPC0025在10 mJ/pluse雷射退火後可以提高一氧化碳及甲烷產量，1 mJ/pluse的雷射退火則可使CPC01對於甲烷的選擇性更好。

This research is divided into two parts. In the first part, activated carbon supported CoPdCu ternary nanoparticles were synthesized by a wet chemical reduction method with different molar ratios. The molar ratios were respectively 1:1:0.025, 1:1:0.05, 1:1:0.1, 1:1:0.2, 1:1:0.3 (namely CPC0025 - CPC03). To characterize the CoPdCu nanoparticles, used electrochemical analysis to confirm the chemical compound on the particle’s surface. Then used X-ray absorption spectroscopy and X-ray diffraction to analysis the fine structure, ex: chemical state, ordering and surrounding environment. At last, gas chromatography was used for determining the applicability as the nanocatalysts for CO2 reduction reaction.
In the second part, 1 mJ/pluse and 10 mJ/pluse sub-millisecond laser annealing were used to anneal CPC0025, CPC01 and CPC03. Experimental results show that lasers of different energy let atoms moved different distances. After 1 mJ/pluse laser annealing, the Cu on the surface dispersed, which can increase the metal state of Co and Pd surface. The oxidation state of Cu increased, and the ordering of Pd improved; After 10 mJ/pluse laser annealing, the Cu on the surface gathered and grew together, which can increase the oxidation state of Co and Pd surface. The metal state of Cu increased, and Pd arrangement became more orderly due to greater energy. The higher amount of Cu made the above-mentioned effect greater, and the thicker Cu thickness required higher annealing energy to reduce the Cu oxide to the metal. As the application of nanocatalysts for CO2 reduction, CPC0025 can increase the production of CO and CH4 after 10 mJ/pluse laser annealing, and 1 mJ/pluse laser annealing let CPC01 selectivity for methane better.

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