Kinetics of the Reaction at the Silver–Silver Sulfide Interface
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概要
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The reaction rate at the Ag/Ag<SUB>2</SUB>S interface was determined as a function of silver activity of Ag<SUB>2</SUB>S in the temperature range 215–400°C. The silver activity of Ag<SUB>2</SUB>S at the interface was measured electrochemically by means of an Ag/AgI electrode. The reaction rate was measured by the direct sulfurization method (Wagner's pellet method) and by Rickert's method using Ag/AgI/Ag<SUB>2</SUB>S/Pt cell. The rates obtained by the two methods were in good agreement. It was found that this is a first-order reaction with respect to the activity of sulfur in Ag<SUB>2</SUB>S and that the rate equation is given by<BR><I>v</I>=1.0×10<SUP>4</SUP>{exp(−18000⁄<I>RT</I>)}<I>a</I><SUB>s</SUB>eqv cm<SUP>−2</SUP>s<SUP>−1</SUP> (i)<BR>The following reaction mechanism prevails at the interface.<BR>2Ag(A)+<I>S</I>(Ag<SUB>2</SUB>S)→2Ag+(Ag<SUB>2</SUB>S)+S<SUP>2−</SUP>(Ag<SUB>2</SUB>S) (ii)
- 公益社団法人 日本化学会の論文
著者
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Fueki Kazuo
Department Of Industrial Chemisrty Faculty Of Science And Technology Science University Of Tokyo
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Mizusaki Junichiro
Department of Industrial Chemistry, Faculty of Engineering, The University of Tokyo
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Mukaibo Takashi
Department of Applied Chemistry Faculty of Engineering The University of Tokyo
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