Atomic metal,N, S co-doped 3D porous nano-carbons: Highly efficient catalysts for HT-PEMFC |
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Authors: | Wenqi Liu Qingjun Chen Feng Zhang Dongyan Xu Xiaojin Li |
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Affiliation: | 1. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong, China;2. CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;3. Dalian National Laboratory for Clean Energy, Dalian 116023, China;4. Faculty of Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;5. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China |
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Abstract: | A new strategy for fabricating atomically dispersed heteroatom-doped nanoporous carbon materials is reported. Through the self-assembly of dopamine, triblock copolymer F127, and metal ions, different three-dimensional atomic metal-N/S doped carbon catalysts are obtained after pyrolysis. Noble metal salts with ferrous sulfate induce the bimetallic monatomic FeM (M = Pd, Pt) N, S-doped carbon catalysts. Minute amounts of Pt or Pd single atoms in the catalysts greatly improve the oxygen reduction reaction (ORR) activity both in acidic and alkaline conditions. Typically, the obtained Fe, Pt–N/S co-doped carbon (FePt-NSC) catalyst exhibits superior ORR performance with positive half-wave potentials (E1/2) of 0.89 and 0.80 V in alkaline and acidic solutions, respectively. In addition, FePt-NSC displays dominant four electron catalytic process and excellent electrocatalytic stability. The high temperature proton exchange membrane fuel cell (HT-PEMFC) test (160 °C) illustrates that FePt-NSC reaches 0.67 V at 400 mA/cm2 and achieves the peak power density of 628 mW/cm2, better than most of the catalysts reported at the similar conditions. These results indicate the atomic metal-N/S doped porous carbon catalysts to be highly promising low-Pt catalysts for HT-PEMFC. |
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Keywords: | Atomic metal-N/S doping Oxygen reduction reaction Nanoporous carbon Low-Pt catalyst |
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