Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (6): 1473-1481.doi: 10.3866/PKU.WHXB201603112

• ARTICLE • Previous Articles     Next Articles

New Methanol-Tolerant Oxygen Reduction Electrocatalyst——Nitrogen-Doped Hollow Carbon Microspheres@Platinum Nanoparticles Hybrids

Chun-Xia TIAN,Jun-Shuai YANG,Li LI,Xiao-Hua ZHANG,Jin-Hua CHEN*()   

  • Received:2016-01-15 Published:2016-06-03
  • Contact: Jin-Hua CHEN E-mail:chenjinhua@hnu.edu.cn
  • Supported by:
    The project was supported by the Program for Changjiang Scholars and Innovative Research Team in University, China(IRT1238);NationalNatural Science Foundation of China(21275041, J1210040, J1103312);长江学者和创新团队发展计划(IRT1238);国家自然科学基金(21275041, J1210040, J1103312)

Abstract:

A new methanol-tolerant oxygen reduction electrocatalyst,nitrogen-doped hollow carbon microspheres@platinum nanoparticles hybrids (HNCMS@Pt NPs),has been synthesized by a facile template route.In brief,Pt NPs were loaded on the surface of NH2-functionalized SiO2 microspheres (Pt NPs/SiO2).Then, the Pt NPs/SiO2 hybrids were wrapped by polydopamine (PDA) film.After direct carbonization of PDA-wrapped Pt NPs/SiO2 hybrids under a nitrogen atmosphere and further treatment in a hydrofluoric acid solution,Pt NPs embedded within nitrogen-doped hollow carbon microsphere (HNCMS) were obtained and labeled as HNCMS@Pt NPs.Scanning electron microscopy,transmission electron microscopy,X-ray diffraction,Raman spectroscopy,specific surface area analysis,and X-ray photoelectron spectroscopy were used to characterize the HNCMS@Pt NPs hybrids.The electrochemical properties of the HNCMS@Pt NPs hybrids for oxygen reduction reaction have also been investigated by cyclic voltammetry and linear sweep voltammetry.The results show that the Pt loading mass in the HNCMS@Pt NPs hybrids is up to 11.9%(w,mass fraction).Furthermore, the as-prepared HNCMS@Pt NPs catalyst exhibits good electrocatalytic activity,high stability,and excellent methanol-tolerance toward oxygen reduction reactions,implying potential applications in practical direct 1473 methanol fuel cells (DMFCs) as methanol-tolerant cathodic catalysts.

Key words: Pt nanoparticle, Nitrogen-doping, Hollow carbon microsphere, Oxygen-reduction reaction, Methanol-tolerance

MSC2000: 

  • O646