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- W4283766286 abstract "For a future hydrogen economy, non precious metal catalysts for the water splitting reactions are needed that can be implemented on a global scale. MNC catalysts with MN4 active sites show promising performance, but an optimization rooted in structure property relationships has been hampered by their low structural definition. Porphyrin model complexes are studied to transfer insights from well-defined molecules to MNC systems. This work combines experiment and theory to evaluate the influence of porphin substituents on the electronic and electrocatalytic properties of MN4 centers with respect to the hydrogen evolution reaction (HER) in aqueous electrolyte. We found that the choice of substituent affects their utilization on the carbon support and their electrocatalytic performance. We propose an HER mechanism for supported iron porphyrin complexes involving a [FeII(P▪)]- radical anion intermediate, in which a porphinic nitrogen atom acts as an internal base. While this work focuses on the HER, the limited influence of a simultaneous interaction with the support and an aqueous electrolyte will likely be transferrable to other catalytic applications." @default.
- W4283766286 created "2022-07-02" @default.
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- W4283766286 date "2022-06-30" @default.
- W4283766286 modified "2023-10-16" @default.
- W4283766286 title "Substituent effects in iron porphyrin catalysts for the hydrogen evolution reaction" @default.
- W4283766286 doi "https://doi.org/10.26434/chemrxiv-2022-x76g3" @default.
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