Synthesis of well dispersed palladium nanoparticles-decorated poly(o-phenylenediamine) colloids with excellent performance for hydrazine oxidation

详细信息	查看全文 | 推荐本文 |

• 作者：Fang Liao ; ^{liaozhang2003@163.com} ; Zhoufeng Wang ; Tingting Guo ; Tingting Zhang ; Zhiping Wu
• 关键词：Poly(o-phenylenediamine) ; Palladium nanoparticle ; Hydrazine ; Electrooxidation
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2012
• 期刊代码：pca22_15726657
• 类别：ce
• 出版时间：15 May, 2012
• 卷：673
• 期：Complete
• 页码：38-42
• 文件大小：585 K

摘要

In this paper, we reported the synthesis of well dispersed Pd nanoparticles (PdNPs)-decorated poly(o-phenylenediamine) (PoPD) colloids without any surfactants. The PoPD colloids were easily prepared via chemical polymerization of oPD monomers by ammonium persulfate (APS) at room temperature. The nano-sized and well-dispersed PdNPs on PoPD could be obtained through an effective two step chemical reduction route. First, the nitrogen atoms on the surface of PoPD could coordinate to ions, and PoPD was oxidized with simultaneous reduction of a part of Pd²⁺ to Pd⁰ (the sample was denoted as Pd/P1). Thereby, PdNPs could be anchored and stabilized by the amino group of PoPD. In the second step, with the addition of the ascorbic acid, the Pd/P1 was further transformed into Pd/P2 because of strong reduction of ascorbic acid. A large amount of excellent dispersed PdNPs with tens of nanometer size were supported on PoPD colloids. Notably, the Pd/P2 catalyst exhibited excellent catalytic activity towards hydrazine electrooxidation. It should be contributed to changed mass transport and the existence of porosity. This provides a promising approach to prepare polymer-based nanoelectrocatalysts with high performance for hydrazine oxidation.