Citation: Xiangfen Jiang, Xuebin Wang, Liming Shen, Qiang Wu, Yangnian Wang, Yanwen Ma, Xizhang Wang, Zheng Hu. High-performance Pt catalysts supported on hierarchical nitrogen-doped carbon nanocages for methanol electrooxidation[J]. Chinese Journal of Catalysis, ;2016, 37(7): 1149-1155. doi: 10.1016/S1872-2067(15)61117-2 shu

High-performance Pt catalysts supported on hierarchical nitrogen-doped carbon nanocages for methanol electrooxidation

a. Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu, China;
b. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba 3050044, Japan

Received Date: 30 March 2016
Revised Date: 18 April 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21473089, 51232003, 21373108, 51571110, 21573107), the National Basic Research Program of China (973 Program, 2013CB932902), Suzhou Science and Technology Projects (ZXG2013025), and Changzhou Science and Technology Projects (CE20130032). This work was also supported by a Project Funded by the Technology Support Priority Academic Program Development of Jiangsu Higher Education Institutions.

Hierarchical nitrogen-doped carbon nanocages (hNCNC) with large specific surface areas were used as a catalyst support to immobilize Pt nanoparticles by a microwave-assisted polyol method. The Pt/hNCNC catalyst with 20 wt% loading has a homogeneous dispersion of Pt nanoparticles with the average size of 3.3 nm, which is smaller than 4.3 and 4.9 nm for the control catalysts with the same loading supported on hierarchical carbon nanocages (hCNC) and commercial Vulcan XC-72, respectively. Accordingly, Pt/hNCNC has a larger electrochemical surface area than Pt/hCNC and Pt/XC-72. The Pt/hNCNC catalyst exhibited excellent electrocatalytic activity and stability for methanol oxidation, which was better than the control catalysts. This was attributed to the enhanced interaction between Pt and hNCNC due to nitrogen participation in the anchoring function. By making use of the unique advantages of the hNCNC support, a heavy Pt loading up to 60 wt% was prepared without serious agglomeration, which gave a high peak-current density per unit mass of catalyst of 95.6 mA/mg for achieving a high power density. These results showed the potential of the Pt/hNCNC catalyst for methanol oxidation and of the new hNCNC support for wide applications.
- Methanol oxidation,
- Fuel cells,
- Platinum catalyst,
- Hierarchical nitrogen-doped carbon nanocages,
- High performance
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