Nitrogen and sulfur dual-doped carbon nanotube derived from a thiazolothiazole based conjugated microporous polymer as efficient metal-free electrocatalysts for oxygen reduction reaction
Abstract
The present report demonstrates a simple approach for the synthesis of efficient metal-free electrocatalysts of nitrogen- and sulfur-codoped carbon materials (N-S-DPCs) via carbonization of thiazolothiazole based conjugated microporous polymer precursors (XWB-CMP). The precursors are composed of densely populated thiazolothiazole units that uniformly decorate over the micropore surface and can be readily converted into novel N-S-DPCs with a uniform nitorgen/sulfur distribution by template-free pyrolysis. The electrochemical characterization demonstrates that N-S-DPCs obtained at pyrolysis temperature of 1000 °C exhibits a high electrocatalytic activity toward oxygen reduction reaction (ORR), superior durability, good methanol tolerance as compared to the commercial Pt/C catalyst. The present work sheds insights into the effects of heteroatom doping on ORR electrocatalysts.
- Publication:
-
Journal of Power Sources
- Pub Date:
- June 2020
- DOI:
- 10.1016/j.jpowsour.2020.228145
- Bibcode:
- 2020JPS...46128145R
- Keywords:
-
- Conjugated microporous polymer;
- Heteroatom-doped carbon materials;
- Thiazolothiazole based;
- Oxygen reduction reaction