Energy Conversion Schemes Using Molecular Photosensitizers
(2022) International Conference on Advances Materials, Nanosciences and Applications (ICAMANA 2022) — Location: Belgium
Files
No attached file found for this publication.
Details
- Authors
- Abstract
- Solar energy represents a promising renewable energy source. While photovoltaic technologies have been shown to be very efficient for immediate solar energy conversion to electricity, storing this energy has become a key challenge. One method by which this energy can be “stored” is in chemical bonds. Through various chemical transformations, such as hydrohalic acid (HX) splitting that yields hydrogen gas (H2) and the corresponding halogen (X2) or water splitting into O2 and H2, solar energy is used to form species that can be stored as solar fuels and recombined when needed in a classic fuel cell. In addition, in natural and artificial photosynthesis, light absorption and catalysis are separate processes linked together by exergonic electron transfer. This leads to free energy loss between the initial excited state, formed after light absorption, and the catalytic center formed after the electron transfer cascade. Additional deleterious processes, such as internal conversion and vibrational relaxation, can also initially dissipate as much as 20-30 % of the absorbed photon energy. In this presentation, the focus will be on excited-state and “dark” reactivity, both in solution and at the interface. Excited-state electron-transfer reactions are of essential importance as they provide means to convert solar energy into stored potential energy and chemical bonds. Recent findings will be presented, which include our efforts to develop layer-by-layer approaches for visible light mediated water oxidation, as well as the development of novel Ru(II), Ir(III) and Fe(III) photosensitizers for photoredox catalysis and energy conversion schemes.
- Affiliations
Citations
Troian-Gautier, L. (2022). Energy Conversion Schemes Using Molecular Photosensitizers. International Conference on Advances Materials, Nanosciences and Applications (ICAMANA 2022), Belgium. https://hdl.handle.net/2078.5/104054