Li Fei, Sun Lang, Luo Yi, Li Ming, Xu Yongjie, Hu Guanghui, Li Xinyu, Wang Liang
College of Science, Guilin University of Technology Guilin 541004 P. R. China
Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University Shanghai 200444 P. R. China
RSC Adv. 2018 May 29;8(35):19635-19641. doi: 10.1039/c8ra02040j. eCollection 2018 May 25.
In this study, a novel and simple hydrothermal method was developed to synthesize sulfur-doped graphene quantum dots (S-GQDs) with a diameter of 1-6 nm and S-GQD/reduced graphene oxide hybrids. The results indicated that an increase in the sulfur content led to superior ORR electrocatalytic activity. Moreover, it is found that thiophene S plays a significant role in the electrocatalytic activity. In addition, the average electron transfer number depends on the content of thiophene S. It is believed that the proposed synthesis strategy is a general and effective method for designing high-performance metal-free electrocatalytic materials.
在本研究中，开发了一种新颖且简单的水热法来合成直径为1-6纳米的硫掺杂石墨烯量子点（S-GQDs）以及S-GQD/还原氧化石墨烯杂化物。结果表明，硫含量的增加导致了优异的氧还原反应（ORR）电催化活性。此外，发现噻吩硫在电催化活性中起着重要作用。另外，平均电子转移数取决于噻吩硫的含量。据信，所提出的合成策略是设计高性能无金属电催化材料的通用且有效方法。
