Citation: TIAN Chun-Xia, YANG Jun-Shuai, LI Li, ZHANG Xiao-Hua, CHEN Jin-Hua. New Methanol-Tolerant Oxygen Reduction Electrocatalyst——Nitrogen-Doped Hollow Carbon Microspheres@Platinum Nanoparticles Hybrids[J]. Acta Physico-Chimica Sinica, ;2016, 32(6): 1473-1481. doi: 10.3866/PKU.WHXB201603112 shu

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

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China

Received Date: 15 January 2016
Revised Date: 11 March 2016

Fund Project: The project was supported by the Program for Changjiang Scholars and Innovative Research Team in University, China (IRT1238) and National Natural Science Foundation of China (21275041, J1210040, J1103312).

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 methanol fuel cells (DMFCs) as methanol-tolerant cathodic catalysts.
- Pt nanoparticle,
- Nitrogen-doping,
- Hollow carbon microsphere,
- Oxygen-reduction reaction,
- Methanol-tolerance
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