Fabrication, characterization and catalytic activity measurements of nano-crystalline Ag-Cr-O catalysts
Source abstract
Abstract
Abstract This research paper describes the preparation, characterization and the hydrogen peroxide decomposition activity of a series of nano-crystalline Ag-Cr-O catalysts obtained by calcining a parent mixture of silver acetate and ammonium dichromate. This parent has been calcined for 1 h, in air, at the temperature range of 200–700 °C. The characterization of the nano-crystalline Ag-Cr-O catalysts was performed using a series of physico-chemical analyses including TGA-DTA, XRD, FTIR, SEM, TEM, and XPS. The results revealed that heat treatment brought about a significant-phase formation, Ag2Cr2O7 is formed at 200 °C and a mixture of Ag2CrO4 and Cr2O3 are formed over the calcination temperature range of 300–500 °C. AgCrO2 stats to form at 500 °C and becomes a major phase at the range 600–700 °C with a noticeable segregation of metallic silver. The activity of the different nano-crystalline Ag-Cr-O catalysts was tested for hydrogen peroxide decomposition at the temperature range 35–50 °C. The kinetic data showed a direct dependence on the calcination temperature and it was correlated with the formed surface redox-couples.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Catalytic Processes in Materials Science · Nanomaterials for catalytic reactions · Copper-based nanomaterials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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