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|
| Type |
Symposium |
| Area |
Synthesis and Application of Multifunctional Nanocatalyst Materials |
| Room No. |
Room 405+406 |
| Time |
THU 16:30-16:55 |
| Code |
MAT1-3 |
| Subject |
Earth-abundant Catalysts for Electrochemical and Photoelectrochemical Water Splitting |
| Authors |
Ki Min Nam
Department of Chemistry, Pusan National University, Korea |
| Abstract |
Solar-driven water splitting to produce hydrogen and oxygen is a promising approach to convert sunlight into chemical fuels. Complete water splitting involves multi-electron and multi-proton transfer and is challenging from both thermodynamic and kinetic points of view. While many materials have been investigated for potential use in solar water splitting, one of the most critical issue is the development of efficient electrocatalysts for rapid surface kinetics on semiconductor photoelectrodes. The oxygen evolution reaction (OER) is particularly demanding because it requires four proton and electron transfers as well as the formation of an oxygen-oxygen bond. Extensive efforts have been made to develop efficient OER catalysts which can catalyze oxygen evolution at low overpotentials. Currently, the most widely used OER catalysts are expensive ruthenium and iridium oxides. Although many alternative catalysts based on earth abundant metal oxides, phosphates, chalcogenides, and molecular catalysts have been suggested, substantial improvement of catalyst activity is still needed. Furthermore, examining the nature of the loaded electrocatalyst and its interaction with the semiconductor are essential for understanding and creating improved efficiency in photoelectrochemical (PEC) water splitting. The source of catalytic improvement of electrocatalyst on semiconductor will be discussed. |
| E-mail |
namkimin.chem@gmail.com |
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123rd General Meeting of the KCS