RhO cocatalyst for efficient water oxidation over TaON photoanodes in wide pH range under visible-light irradiation
| Autor: | Yoichiro Kato, Ryu Abe, Masanobu Higashi, Osamu Tomita, Yukari Iwase |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Photocurrent
Electrolysis of water business.industry General Chemical Engineering General Physics and Astronomy chemistry.chemical_element General Chemistry Oxygen Artificial photosynthesis chemistry.chemical_compound Semiconductor chemistry Chemical engineering Carbon dioxide Irradiation business Dissolution |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 419:113463 |
| ISSN: | 1010-6030 |
| Popis: | Because the oxidation of water is both the key and a common process in artificial photosynthesis systems, coupled with the reduction of water or carbon dioxide, the development of photocatalysts or photoelectrodes that can efficiently oxidize water to oxygen molecules (O2) under a wide range of conditions (e.g., pH) is crucial. Although the loading of CoOx cocatalysts on oxynitride (e.g., TaON) semiconductor photoanodes has been proven to boost O2 evolution significantly under basic conditions (pH > 8), their performance has been found to decrease significantly with decreasing pH, mainly owing to the dissolution of CoOx; thus, their use in CO2 reduction systems that are generally carried out under acidic solutions has been limited. Here, we demonstrate that nanoparticulate RhOx species can function as an effective cocatalyst to boost O2 evolution on TaON photoanodes under visible-light irradiation, affording not only superior activity to previous CoOx systems but also versatile performance even under acidic conditions. Although the photocurrent on the RhOx/TaON photoanode under acidic conditions (1.5 |
| Databáze: | OpenAIRE |
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