Monitoring the Dissolution and Hydrolysis of Pyrosulfate by Electrochemistry at a Liquid-Liquid Microinterface Array
MetadataShow full item record
Funding and Sponsorship
Dissolution and hydrolysis processes are important in a variety of settings, including industrial and environmental applications. In this work, the hydrolysis of pyrosulfate (disulfate) was investigated by ion-transfer electrochemistry at an array of microinterfaces between two immiscible electrolyte solutions (μITIES). Current associated with pyrosulfate transfer was observed, but it decreased with time. This is due to the hydrolysis of pyrosulfate to hydrogen sulfate and sulfate. Corroborating data for the hydrolysis was obtained from pH measurements (acidification of the aqueous solution) and Raman spectroscopy (formation of sulfate and hydrogen sulfate). Measurement of the ion-transfer potential from the voltammograms enabled estimation of pyrosulfate's Gibbs energy of transfer between the phases. Quantum mechanical calculations were employed to estimate the thermodynamics for the reactions of pyrosulfate, hydrogen sulfate and sulfate, which supported the experimentally observed trends. Altogether, these results illustrate the use of electrochemistry at the μITIES to characterise dissolution and hydrolysis processes.
Showing items related by title, author, creator and subject.
Evaluation of interfacial sulfate complexation by a bis-thiourea ionophore at water-organic interfaces using microelectrochemistry and high resolution mass spectrometryAlvarez de Eulate; Busetti, F.; Arrigan, Damien (2017)Simple, fast and low cost methods for the detection of sulfate are required for different applications. Electrochemistry at water/o-nitrophenyloctylether (W/NPOE) interfaces was employed to evaluate sulfate detection by ...
Light-activated electrochemistry on alkyne-terminated Si(100) surfaces towards solution-based redox probesWu, Y.; Kashi, M.; Yang, Y.; Gonçales, V.; Ciampi, Simone; Tilley, R.; Gooding, J. (2016)Light-activated electrochemistry is a powerful concept, where faradaic electrochemistry at a monolayer protected monolithic silicon electrode can be ‘turned on’ at any location with micron scale resolution simply by ...
Formation and characteristics of glucose oligomers during the hydrolysis of cellulose in hot-compressed waterYu, Yun (2009)Energy production from fossil fuels results in significant carbon dioxide emission, which is a key contributor to global warming and the problems related to climate change. Biomass is recognized as an important part of ...