|About this Abstract
||Materials Science & Technology 2020
||Advances in Synthesis and Integration Methods for Enhanced Properties, and Applications in Emerging Nanomaterials
||Influence of Surface Charge on the Photochemical Reactivity of SrTiO3, BaTiO3, and TiO2/BaTiO3 Heterostructured Catalysts
||Wenjia Song, Mingyi Zhang, Paul Salvador, Gregory S. Rohrer
|On-Site Speaker (Planned)
||Gregory S. Rohrer
For many years, researchers have sought metal oxide catalysts that efficiently split water in sunlight to produce hydrogen fuel. On the surfaces of oxide semiconductors with polar domains, electrons are attracted to positively terminated domains where they promote reduction reactions and holes are attracted to negatively charged domains where they promote oxidation. The separation of charge carriers reduces charge carrier recombination and the back reaction of the reduced and oxidized products. Here, we report results showing that it is possible to optimize the overall photochemical reactivity of SrTiO3 and BaTiO3 by controlling charged surface regions by controlling the solution pH. We will also describe a new high throughput method to study the rate of hydrogen production from BaTiO3, SrTiO3, and TiO2/BaTiO3 heterostructured catalysts as a function of materials preparation parameters and solution pH.