Microwave Assisted Hydrothermal Way Towards Highly Crystalized N-Doped Carbon Quantum Dots and Their Oxygen Reduction Performance

• 来源期刊: 高等学校化学研究（英文版）
• 年，卷（期）: 2019,（2）
• 页码范围: 171-178
• 页数: 8页
• 语种: 英文
• DOI: 10.1007/s40242-019-8343-y

摘要

We proposed a green microwave-assisted hydrothermal way to synthesize highly crystalized N-doped carbon quantum dots(N-CQDs).The N-CQDs obtained by this microwave method have good crystalline degree(ID/IG=0.6) and a high molar ratio of N/C(11.1％) comparing with those obtained from traditional top-down method.The experimental results show that glycerine plays a key role in the formation of highly crystalized N-CQDs.The as-prepared N-CQDs have good luminescent property and may be utilized as fluorescent probe to detect ions or mark cells.As the majority of N atoms in the N-CQDs were pyridinic type(64.8％),the as-prepared N-CQDs were used as a catalyst for the oxygen reduction reaction(ORR) electrocatalysis in the anode of the fuel cell(the onset potential is-0.121 V),which was a 4e-transfer procedure and the catalyst showed good stability after 100 cycles.