在制备微结构可控纳米碳纤维基础上,研究纳米碳纤维微结构对氧气电催化还原反应(oxygen reduction reaction,ORR)性能的影响.利用化学还原法合成了Pt电催化剂,研究了纳米碳纤维微结构对Pt/CNFs电催化剂电催化性能的影响.研究发现,相对于基于活性炭的电催化剂,载于纳米碳纤维的电催化剂具有较高的ORR活性;同时,基于板式纳米碳纤维的电催化剂表现出最高的ORR活性.
Microstructures controllable carbon nanofibers(CNFs),i.e.platelet CNFs(p-CNFs),fish-bone CNFs(f-CNFs) and tube CNFs(t-CNFs),were synthesized and the microstructure effect on oxygen reduction reaction(ORR) performance was investigated.The physico-chemical and electrochemical properties of the CNFs and Pt/CNFs were characterized by high resolution transmission electron microscope(HRTEM),X-ray diffraction(XRD) and cyclic voltammetry.Platinum electrocatalysts supported on CNFs and activated carbons were synthesized,too.Pt/p-CNFs exhibits more positive ORR onset reduction potential than the electrocatalyst supported on other CNFs and activated carbon.