石墨烯催化活性增強技術及其在電化學能源之應用

Activity enhancement technique of graphene and its application on electro-chemical energy

陳心瑜(Hsin-Yu Chen) ； 陳玨安(Chueh-An Chen) ； 李巧琳(Chiao-Lin Lee) ； 曾祈昂(Chi-Ang Tseng) ； 李權倍(Chuan-Pei Lee)

《真空科技》 33卷4期 (2020/12) Pp. 27-36

摘要

本文主要報導異質原子摻雜之曲率化石墨烯包覆銅奈米粒子材料合成技術及其在電化學能源之應用性（如：水分解產氫、染料敏化太陽能電池）。在材料製備上，主要利用化學氣相沉積法搭配三聚氫氨作為氮源前驅物一步驟合成多層石墨烯包覆銅奈米粒子於目標基材。其中透過氮摻雜及曲率工程可分別造成石墨烯電子組態和幾何結構變化，進而產生催化活性位點，使得電催化反應過程中，電荷轉移更容易發生。除此之外，曲率化石墨烯結構比起傳統平面石墨烯更能有效避免二維層狀材料堆疊聚集的缺點，故可暴露出更大的反應表面積以及可讓更多異質原子成功摻雜在石墨烯結構，大幅度增加催化活性位點的數量。同時本文中相關背景文獻也將簡要介紹。

關鍵字

化學氣相沉積 ； 染料敏化太陽能電池 ； 電化學能源 ； 石墨烯 ； 異質原子摻雜 ； 水分解產氫反應

並列摘要

This article reports the synthesis technique of curved and heteroatom doped graphene-wrapped copper nanoparticles, and its potential application on electrochemical energy (i.e., hydrogen evolution reaction and dye-sensitized solar cell). Above-mentioned samples are synthesized in chemical vapor deposition (CVD) reaction using melamine as a chemical precursor via an in-situ-nitrogen-doping approach in one step. With the introduction of nitrogen into graphene could not only create an electron-donating area, but also increase the conjugation between the lone-pair electrons of nitrogen and the delocalized π-system of graphene, resulting in the improved electro-catalytic reaction; besides, the curved structure of the graphene shell has the advantages of preventing the restacking of traditional two-dimensional materials, maximizing the reaction surface area and enhancing the heteroatom-doping level of graphene to create more active sites for charge transfers during reaction. Herein, we also briefly introduce the related background and literatures.

並列關鍵字

Chemical vapor deposition ； Dye-sensitized solar cell ； Electro-chemical energy ； Graphene ； Heteroatomic doping ； Hydrogen evolution reaction