Honeycomb-like mesoporous nitrogen-doped carbon supported Pt catalyst for methanol electrooxidation. (November 2015)

• Record Type: Journal Article
• Authors: Zhang, Li-Mei; Wang, Zhen-Bo; Zhang, Jing-Jia; Sui, Xu-Lei; Zhao, Lei; Gu, Da-Ming
• Is Part Of: Carbon. Volume 93(2015)
• Page Start: 1050
• Page End: 1058
• Publication Date: 2015-11
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2015.06.022
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: A novel nitrogen-doped carbon material with honeycomb-like mesoporous structure was synthesized via carbonization of polyaniline under template and acted as support for the Pt catalyst. Pyrolysis temperature plays a significant role in enhancing electrochemical performance of Pt/mesoporous nitrogen-doped carbon (Pt/MNC) catalyst. Considering comprehensively electrocatalytic activity and stability for methanol electrooxidation, MNC-900 (MNC prepared at pyrolysis temperature of 900 °C) is an appropriate support for Pt catalyst. Moreover, the electrochemical performance of Pt/MNC-900 catalyst is significantly superior to that of Pt/mesoporous carbon (Pt/MC) catalyst. The enhancement is attributed to N species introduced to the support and optimal proportion of pyridinic N, pyrrolic N and graphitic N. When the contents of pyridinic N, pyrrolic N and graphitic N achieve optimal proportion, MNC support reveals not only intense anchoring effect of Pt nanoparticles but also enhanced electric conductivity, further improving electrocatalytic activity and stability of the catalyst.