電化學水裂解反應被視為最有效生成氫氣的方式，而資源稀少且昂貴的貴金屬催化劑成為其實際應用上最大的阻礙。過渡金屬二硫化物(TMDC)因其獨特的層狀結構、豐富的資源和優異的性能而成為廣泛應用於產氫(HER)和產氧反應(OER)的材料之一。本實驗透過在垂直式爐管中進行電漿輔助化學氣相沉積法(PECVD)，成功在發泡鎳基板上合成了大量超薄NiTe2奈米片，藉由改變製程溫度、氣流、電漿等參數，能夠對發泡鎳表面結構進行控制，從而生成NiTe2奈米花、奈米片、奈米顆粒等不同形貌，也導致不同的HER及OER性能。除此之外，電漿輔助製程下NiTe2可以在最低200°C下合成奈米片，並增強NiTe2奈米片在HER與OER之循環穩定性，最後，NiTe2奈米片能夠均勻沉積在直徑10 cm之發泡鎳基板上。本實驗藉由電漿的幫助下同時達成降低製程溫度、增強奈米結構穩定性與擴大製程面積等效果，也為未來碲化物材料在市場上帶來更多的發展性。

Water splitting is regarded as the most effective way to generate hydrogen, and the scarcity and costliness of the precious-metal catalysts have become the major challenge for practical applications. Herein, large-area ultra-thin NiTe2 nanosheets are successfully synthesized by the direct plasma-assisted tellurization of nickel foam via a chemical vapor deposition method. By varying the processing temperature, gas flow ratio, and plasma, we can control the morphology of NiTe2 nanostructure. The different morphology such as nanoflowers, nanosheets, and nanoparticles was synthesized, resulting in different electrocatalytic performance. In addition, the plasma-enhanced process can greatly decrease the processing temperature to 200°C, and enhance the stability of NiTe2 nanosheets in HER and OER. Finally, NiTe2 nanosheets can be synthesized uniformly in the diameter of 10 cm on the nickel foam substrate. In this work, plasma-enhanced process is used to reduce the synthesized temperature, enhance the stability of the nanostructure, and expand the synthesized area at the same time. It will paves a new pathway to the preparation of NiTe2-based electrocatalysts for improving water splitting performance.

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