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Citation: KAN Xian-Wen, GAO Ying-Chun, TAO Hai-Sheng, WANG Guang-Feng, FANG Bin. Synthesis of Ag and Ag₂O Nanoparticles and Their Electrocatalysis at Pb Electrode[J]. Chinese Journal of Applied Chemistry, ;2005, 22(4): 377-381. shu

Synthesis of Ag and Ag₂O Nanoparticles and Their Electrocatalysis at Pb Electrode

1.
College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000

Corresponding author: FANG Bin,
Received Date: 16 July 2004
Available Online: 14 December 2004
Fund Project: 国家教育部科技重点项目基金(00177) (00177)安徽省教育厅自然科学基金(2004kj171) (2004kj171)安徽师范大学青年科学基金(2003xqn13)资助项目 (2003xqn13)

Stable silver nanoparticles were synthesized via chemical reduction,and silver oxide nanoparticles were synthesized by means of mechanical stirring or sonicating,and both were characterized by TEM.The Ag and Ag₂O nanoparticles can significantly increase the reductive peak current of Pb(Ⅱ)/Pb(Ⅳ) at the Pb electrode which indicates that these nanoparticles have high electrocatalytic activities for the reduction of Pb(Ⅳ) to Pb(Ⅱ).The appearance of an extra reduction peak in the presence of Ag₂O nanoparticles indicates that they also exhibit Ag⁺ electrochemistry besides the electrocatalysis behavior due to the small amount of Ag⁺ adsorbed.The electrochemical behavior and the SEM images of the electrodes prove that the silver and silver oxide nanoparticles adsorbed and congregated on the surface of the lead electrode.In the indirected oxidation of Mn²⁺,the yield of the oxidative product Mn³⁺ increased by 11.11% or 18.51% respectively in the presence of Ag or Ag₂O nanoparticles.
- silver nanoparticle,
- silver oxide nanoparticle,
- electrocatalysis,
- adsorption,
- cyclic voltammetry
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Synthesis of Ag and Ag₂O Nanoparticles and Their Electrocatalysis at Pb Electrode