Citation: Xuecheng Yan, Yi Jia, Longzhou Zhang, Xiangdong Yao. Platinum stabilized by defective activated carbon with excellent oxygen reduction performance in alkaline media[J]. Chinese Journal of Catalysis, ;2017, 38(6): 1011-1020. doi: 10.1016/S1872-2067(17)62765-7 shu

Platinum stabilized by defective activated carbon with excellent oxygen reduction performance in alkaline media

School of Natural Sciences and Queensland Micro-and Nanotechnology Centre, Griffith University, Nathan Campus, QLD 4111, Australia

Received Date: 17 November 2016
Revised Date: 31 December 2016

The exploration of highly active and durable cathodic oxygen reduction reaction (ORR) catalysts with economical production cost is still the bottleneck to realize the large-scale commercialization of fuel cells and metal-air batteries. Given that carbon support is crucial to the electrocatalysts, and Pt is the best-known ORR catalyst so far, in this work, we employed a simple impregnation method for synthesizing a kind of defective activated carbon (D-AC) supported low Pt content electrocatalysts for the ORR. The reduction conditions of the Pt-containing precursor were firstly optimized, and the influence of the Pt loading amount on the ORR was investigated as well. The results show that the obtained D-AC@5.0%Pt sample (contains 5 wt% Pt) has surpassed the commercial Pt/C with 20 wt% Pt for the ORR in an alkaline solution. In the meantime, it is more stable than the commercial Pt/C. The outstanding ORR performance of the D-AC@5.0%Pt confirms that both the unique defects in the D-AC and the introduced Pt particles are indispensable to the ORR. Particularly, the ORR activity of the synthesized catalysts is superior to most of the reported counterparts, but with much easier preparation methods and lower production cost, making them more advantageous in practical fuel cell applications.
- Activated carbon,
- Defect,
- Platinum,
- Oxygen reduction reaction,
- Fuel cell
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