Nitrogen-doped carbon coated palygorskite as an efficient electrocatalyst support for oxygen reduction reaction |
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| Authors: | Rongfang Wang Jingchun Jia Hao Li Xusheng Li Hui Wang Yanming Chang Jian Kang Ziqiang Lei |
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| Affiliation: | aKey Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China;bDepartment of Chemical Engineering, Huizhou University, Huizhou, Guangdong 516007, China |
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| Abstract: | An electrocatalyst support, nitrogen-doped graphitic layer (CNx) coated palygorskite (PLS) (donated as PLS@CNx), is synthesized by carbonizing the polypyrrole (PPy) coated PLS and is explored for the first time as a cathode electrocatalyst support in proton exchange membrane fuel cell. The structural and chemical properties of the PLS@CNx are investigated by Fourier-Transform infrared spectrometer, thermogravimetric analysis, X-ray diffraction and transmission electron microscopy. The electrocatalytic activity and stability of Pt/PLS@CNx toward oxygen reduction reaction (ORR) are studied by cyclic voltammetry (CV) and steady state polarization measurements. Upon loading Pt (20 wt%), the catalysts exhibit superior catalytic performance during ORR, surpassing the conventional Pt/C (Vulcan XC-72) catalysts. High electrocatalytic activity and good stability can be attributed to the nitrogen atom incorporation and SiO2 component in PLS. |
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| Keywords: | Palygorskite Nitrogen-dopant Supported catalysts Electrocatalysts Oxygen reduction reaction |
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