【作者】 韩聪聪； 王瑞琴； 吴文婷； 吴明铂；

【Author】 Congcong Han;Ruiqin Wang;Wengting Wu;Mingbo Wu;State Key Laboratory of Heavy Oil Processing,China University of Petroleum;

【机构】 中国石油大学(华东)化学工程学院重质油国家重点实验室；

【摘要】 碳量子点(Carbon Quantum Dots,CQDs)由于其颗粒尺寸小,载流子能量呈量子化而具有优异的光学性能和电学性能。钴基催化剂可作为产氧助催化剂来降低析氧反应中产氧过电位,提高电催化反应速率。本论文以具有刚性结构的钴金属配合物为原料,结合呈二维平面结构,热聚后可形成鳞状石墨烯片层的Na2[Zn(EDTA)],通过一步热解法制备出钴锌共掺杂的碳量子点(Co-Zn-CQDs)。钴与碳量子点中石墨烯结构相结合,有利于进一步提升其电子传输能力。Co-Zn-CQDs在1,4-二氢吡啶的光催化氧化中显示出高效的催化性能,同时在电催化析氧反应中,起始电位为1.6 V(vs RHE),电流密度可达24.4 m A/cm-2。更多还原

【Abstract】 Carbon quantum dots(CQDs) shows excellent optical and electrical properties due to its small particle size and quantization of energy carriers. The cobalt-based catalyst can be used as promoter to reduce the overpotential for oxygen evolution and increase the reaction rate. Here, water soluble Co-Zn-CQDs with high quantum yield was achieved by a one-step pyrolytic of cobalt metal complex with rigid structure and Na2[Zn(EDTA)] with two-dimension plane structure. With the combination of cobalt and graphene structure, its electronic transmission capacity has been significantly increased. The photocatalytic efficiency of Co-Zn-CQDs in the photooxidation reaction of 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate is improved significantly.On the same time, the resulting for oxygen evolution reaction(OER) also exhibits higher electrocatalytic activity(onset overpotential is 1.6V vs RHE and current density is 24.4 m A/cm-2).更多还原