Nitrogen-doped carbon coated palygorskite as an efficient electrocatalyst support for oxygen reduction reaction

作者：Wang, Rongfang^*; Jia, Jingchun; Li, Hao; Li, Xusheng; Wang, Hui; Chang, Yanming; Kang, Jian; Lei, Ziqiang

来源：Electrochimica Acta, 2011, 56(12): 4526-4531.

DOI：10.1016/j.electacta.2011.02.066

• Palygorskite
• Nitrogen-dopant
• Supported catalysts
• Electrocatalysts
• Oxygen reduction reaction

An electrocatalyst support, nitrogen-doped graphitic layer (CN(x)) coated palygorskite (PLS) (donated as PLS@CN(x)), 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@CN(x) are investigated by Fourier-Transform infrared spectrometer, thermogravimetric analysis, X-ray diffraction and transmission electron microscopy. The electrocatalytic activity and stability of Pt/PLS@CN(x) 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 SiO(2) component in PLS.

• 出版日期2011-4-30
• 单位惠州学院; 西北师范大学