The rate of sulfur transfer across the gas/solid interface involving H2S(g) and α-Ag2+xS surface has been investigated using resistance relaxation measurements at 300°C. The rate of the oxidation reaction incorporating sulfur into Ag2+x.S has been found to decrease with sulfur activity in the sample as (αs)-1/2 while the rate of the reduction reaction corresponding to the sulfur loss is found to increase with the sulfur activity as (αs)1/2. The rate-limiting step has been identified to be H2S + 2e-= S2-(ad) + H2.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry