A hybrid semiconductor-mediator-catalyst photoelectrochemical (PEC) cell mimicking the PSII is proposed for efficient water oxidation. Addition of carbazole mediator results in a significant enhancement in PEC water oxidation performance as it promotes interfacial hole transfer from the Fe2O3 light absorber to the Ru(carbene) catalyst, a function similar to the tyrosine residue in photosystem II. Such a semiconductor-mediator-catalyst assembly greatly inspires the rational design of high-performance artificial photosynthesis systems.
Niu, F., Wang, D., Williams, L. J., Nayak, A., Li, F., Chen, X., Troian-Gautier, L., Huang, Q., Liu, Y., Brennaman, M. K., Papanikolas, J. M., Guo, L., Shen, S., & Meyer, T. J. (2022). A Semiconductor‐Mediator‐Catalyst Artificial Photosynthetic System for Photoelectrochemical Water Oxidation. Chemistry: A European Journal, 28(10), 1521-3765. https://doi.org/10.1002/chem.202102630 (Original work published 2022)