Briggs-Rauscher reaction as a novel electrochemical detector for phosphate tungsten and phosphate molybdenum bronzes

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2019-09, Vol.849, p.113369, Article 113369
• Main Authors: Pagnacco, Maja C., Maksimović, Jelena P., Mudrinić, Tihana M., Mojović, Zorica D., Nedić, Zoran P.
• Format: Article
• Language: English
• Subjects: Briggs-Rauscher reaction; Bronzes; Catalysis; Catalytic activity; Electrical resistivity; Heat treatment; Inductively coupled plasma; Linear functions; Molybdenum; Organic chemistry; Oscillatory reactions; Phosphate molybdenum bronze; Phosphate tungsten bronze; Tungsten bronze
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/j.jelechem.2019.113369

Briggs-Rauscher (BR) oscillatory reaction is a chemical system very sensitive to different analyte addition. Changes in oscillatory dynamics, by analyte addition, could be successfully used for the determination of analyte concentration, as well as for its antioxidative/antiradical activity assessment. In this work, the BR reaction is used as a system detector for distinguishing solid unsolvable materials, such as phosphate tungsten bronze (PWB) and phosphate molybdenum bronze (PMoB), obtained by thermal treatment. The addition of different masses of PWB in BR reaction decreases its oscillation time, while the addition of different masses of PMoB had no effects on the BR oscillation time. Additionally, the BR oscillation time is the linear function of added PWB mass. The mechanism of bronzes action is investigated by using pH and electric conductivity measurements, as well as inductively coupled plasma and the cyclic voltammetry measurements, and it can be ascribed to PWB better catalytic activity then PMoB, under BR reaction condition. This work extends the practical aspect of the BR reaction for testing solid (insoluble) materials, and opening the possibility of using oscillatory reactions in material science and catalysis, in general. [Display omitted] •Insoluble PWB linearly decreases the BR oscillation time.•Insoluble PMoB had no effects on the BR reaction.•Obtained behavior can be successfully used to distinguish PWB and PMoB.•PWB has identical role as metal catalyst Mn2+ in BR reaction.•Extension of BR reaction practical aspect to material science and catalysis.