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Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (10): 1179-1185. Previous Articles Next Articles
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赵佳越, 周益明, 吴云胜, 唐亚文, 陈煜, 陆天虹
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直接甲酸燃料电池碳载Pd阳极催化剂稳定性研究;直接甲酸燃料电池中能降低Pd催化剂催化甲酸分解速率又能提高其对甲酸氧化的电催化稳定性的方法及机理研究
ZHAO Jia-Yue, ZHOU Yi-Ming, WU Yun-Sheng, TANG Ya-Wen, CHEN Yu, LU Tian-Hong
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Purified multi-walled carbon nanotubes (MWNTs) were treated with concentrated HNO3 or mixed acid [V(HNO3)∶V(H2SO4)=1∶1], respectively. When MWNTs were treated in concentrated HNO3 solution, suitable amount of hydrophilic O-containing surface groups would be formed. So the average size of the Pd nanoparticles deposited on the surface of the pretreated MWNTs is small and uniform, leading to the good electrocatalytic performance of the resulting Pd/MWNTs catalyst for the hydrazine electrooxidation. If purified MWNTs were untreated, the pristine surface of MWNTs prevented deposition of Pd nanoparticles on the surface of MWNTs, which lead to the aggregation of Pd nanoparticles. When MWNTs were treated in mix acid solution, the amount of the hydrophilic O-containing surface groups formed on MWNTs was abundant, which also resulted in the agglomeration of Pd nanoparticles. Consequently, the resulting Pd/MWNTs catalysts displayed the low electrocatalytic performance for the hydrazine electrooxidation.
Key words: carbon nanotube, Pd nanoparticle, hydrazine, electrocatalytic oxidation, fuel cell
ZHAO Jia-Yue, ZHOU Yi-Ming, WU Yun-Sheng, TANG Ya-Wen, CHEN Yu, LU Tian-Hong. Effect of Modification Extent of Carbon Nanotubes on Electrocatalytic Performance of Pd Nanoparticles for Hydrazine Oxidation[J]. Acta Chimica Sinica, 2011, 69(10): 1179-1185.
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