The ever decreasing sources of fossil fuels have launched extensive research of alternative materials that might play a key role in their replacement. Therefore, the scientific community continuously investigates the possibilities of maximizing the working capacity of such materials in order to fulfill energy challenges in the near future. In this context, doping of the semiconducting materials is a versatile strategy to trigger their physicochemical properties as well their electrochemical performance. Herein, the impact of rhenium doping toward photoelectrochemical activity of MoSe2 and WSe2 was studied. Our results indicate that rhenium as a dopant contributes to better overall electrochemical performance, that is, an easier electron transfer of these materials compared to pristine compounds. Additionally, the photoelectrochemical measurements revealed that the doping with rhenium generated an enhancement of the photocurrent response of MoSe2 as well as WSe2 under UV light illumination.

Center for Advanced Functional Nanorobots Department of Inorganic Chemistry University of Chemistry and Technology Prague Technická 5 CZ 166 28 Prague 6 Czech Republic

Central European Institute of Technology Brno University of Technology Purkyňova 656 123 CZ 612 00 Brno Czech Republic

Department of Chemical and Biomolecular Engineering Yonsei University 50 Yonsei ro Seodaemun gu Seoul 03722 Korea

Department of Inorganic Chemistry University of Chemistry and Technology Prague Technická 5 CZ 166 28 Prague 6 Czech Republic

Department of Medical Research China Medical University Hospital China Medical University No 91 Hsueh Shih Road Taichung 40402 Taiwan

Regional Centre of Advanced Technologies and Materials Palacký University ŠlechtiteluÅ 27 CZ 783 71 Olomouc Czech Republic

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2D Rhenium- and Niobium-Doped WSe2 Photoactive Cathodes in Photo-Enhanced Hybrid Zn-Ion Capacitors