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Citation: TANG Hao-Lin, PAN Mu, MU Shi-Chun, YUAN Run-Zhang. Synthesis of Cationic Ionomer Modified Pt Nano-particles[J]. Chinese Journal of Applied Chemistry, ;2004, 21(8): 779-782. shu

Synthesis of Cationic Ionomer Modified Pt Nano-particles

1.
State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing, Wuhan University of Technology, Wuhan 430070

Corresponding author: PAN Mu,
Received Date: 28 September 2003
Available Online: 12 March 2004
Fund Project: 教育部博士点基金(20020497001) (20020497001)

Cationic ionomer modified Pt nano-particles were synthesized by chemical reduction using polydiallyldimethylammonium chloride(PDDA) as a modification ion. From a reaction solution containing a mixture of PDDA(M_w=5 000) and Pt with n(PDDA):n(Pt)=10:1 and pH value of 8.5, Pt nano-particles sized in ~4.5 nm were obtained in 5 min reaction. The reduction reaction rate increased with the decrease of the PDDA content and the increase of the pH. The steric hinderance effect of the modifier becomes greater and the electrostatic effect of the modifier reduces as a result of the increase in the degree of polymerization of PDDA. Therefore, the content of PDDA necessary for obtaining stable Pt particles first increases and then decreases as polymerization degree of PDDA increases.
- Pt nano-particle,
- quaternary ammoniums cationic ion,
- synthesis
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