A novel method for synthesis of phosphomolybdic acid-modified Pd/C catalysts for oxygen reduction reaction

作者：Zhu, Mingyuan; Gao, Xiaoling; Luo, Guangqin; Dai, Bin^*

来源：Journal of Power Sources, 2013, 225: 27-33.

DOI：10.1016/j.jpowsour.2012.10.023

• Oxygen reduction reaction
• Methanol tolerance
• Heteropolyacids
• Palladium catalyst
• Stability
• Activity

This manuscript reports a convenient method for immobilizing phosphomolybdic acid (HPMo) on polyaniline (PAN-) functionalized carbon supports. The obtained HPMo-PAN-C sample is used as the support to prepare a Pd/HPMo-PAN-C catalyst. The samples are characterized by Fourier transform infrared spectroscopy, transmission electron microscopy and X-ray diffraction analysis. The results suggest that HPMo retains its Keggin structure and that the presence of HPMo reduces the average particle size of the Pd nano-particles in the obtained Pd/HPMo-PAN-C catalyst. Electro-chemical measurements in 0.5 M HCIO4 solution reveal that the Pd/HPMo-PAN-C catalyst has higher catalytic activity for oxygen reduction reactions than does a Pd/C catalyst prepared using a similar procedure. The stability of the Pd/HPMo-PAN-C catalyst is evaluated by multiple-cycle voltammetry techniques; the mass catalytic activity decreases by only 10% after 100 scanning cycles.

• 出版日期2013-3-1
• 单位石河子大学