Journal
CHEMSUSCHEM
Volume 15, Issue 12, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202200708
Keywords
flow-chemistry; photocatalysis; photoreaction engineering; ruthenium; water oxidation
Funding
- Deutsche Forschungsgemeinschaft DFG [TRR234, 364549901]
- Projekt DEAL
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This work elaborates on the effect of dynamic irradiation on light-driven molecular water oxidation and emphasizes the importance of overall reaction engineering in overcoming limiting factors. By controlling the local availability of photons, the overall catalytic efficiency can be significantly enhanced.
This work elaborates the effect of dynamic irradiation on light-driven molecular water oxidation to counteract deactivation. It highlights the importance of overall reaction engineering to overcome limiting factors in artificial photosynthesis reactions. Systematic investigation of a homogeneous three-component ruthenium-based water oxidation system revealed significant potential to enhance the overall catalytic efficiency by synchronizing the timescales of photoreaction and mass transport in a capillary flow reactor. The overall activity could be improved by a factor of more than 10 with respect to the turnover number and a factor of 31 referring to the external energy efficiency by controlling the local availability of photons. Detailed insights into the mechanism of light driven water oxidation could be obtained using complementary methods of investigation like Raman, IR, and UV/Vis/emission spectroscopy, unraveling the importance of avoiding high concentrations of excited photosensitizers.
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