Open AccessA possible connection between phosphate tungsten bronzes properties and Briggs-Rauscher oscillatory reaction response
Author(s) -
Tijana V. Maksimović,
Jelena P. Maksimović,
Pavle Tančić,
Nebojša I. Potkonjak,
Zoran Nedić,
Ljubinka Joksović,
Maja C. Pagnacco
Publication year - 2021
Publication title -
science of sintering/science of sintering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 25
eISSN - 1820-7413
pISSN - 0350-820X
DOI - 10.2298/sos2102223m
Subject(s) - tungsten , bronze , materials science , divalent , catalysis , doping , inorganic chemistry , chemistry , metallurgy , organic chemistry , optoelectronics
The calcium phosphate tungsten bronze (Ca-PWB) has been synthesized and characterized (TGA, DSC, XRPD, FTIR, SEM). The influence of solid insoluble materials Ca- PWB, as well as lithium doped (Li-PWB) and cation free phosphate tungsten (PWB) bronzes on the oscillatory Briggs-Rauscher (BR) reaction dynamics, is compared. The results show that doping with Li and Ca reduces sensitivity of the BR reaction towards bronzes addition. These findings suggest the usage of the BR reaction as an innovative method for testing of different properties of bronze material. The behavior of PWB in the BR reaction is significantly changed with divalent cation (Ca2+) doping. The reasons for the different bronzes behavior were found in their calculated unit cell volumes. Namely, the compressed Ca-PWB unit cell volume indicates the difficult availability of the active site for heterogeneous catalysis. Hence, the linear correlation (slope) of the BR oscillogram?s length (?osc) vs. mass of bronze in BR reaction might be considered as a new parameter for the evaluation of the bronzes catalytic activity.