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[Display omitted] • HCl concentration played essential role in the synthesis of TiO 2 /N-MoS 2. • The addition of ANI and APS contributed to increased capacitive properties of TiO 2 /N-MoS 2. • Introduction of N into MoS 2 enhanced the contribution of diffusion-controlled processes. In this work, nitrogen-doped molybdenum sulfide was directly deposited on titanium dioxide nanotubes substrate (TiO 2 /N-MoS 2) during hydrothermal synthesis. The study focuses on the influence of hydrochloric acid concentration used for the synthesis, with the results indicating its essential role in thioacetamide hydrolysis and thus in the effectiveness of the N-MoS 2 deposition. The electrode material itself is characterized by an initial capacitance of 320 mF cm−2 with 76 % capacitance retention after 10 000 cycles. Moreover, the effect of nitrogen source on the physical and capacitive properties is investigated, revealing that the simultaneous addition of aniline and ammonium persulfate contributes to the improvement of crystallinity and overall electrochemical performance of the electrode material. The analysis of charge storage mechanisms also indicates that the introduction of nitrogen atoms significantly affects the contribution of diffusion-controlled processes. In the construction of a symmetrical device, the specific capacitance of 76 F g−1 and areal capacitance of 70 mF cm−2 with the superior coulombic efficiency and 84 % of capacitance retention after 15,000 cycles is observed, with 11.1 W kg−1 and 5193.4 Wh kg−1 of energy and power density of the device, respectively. [ABSTRACT FROM AUTHOR]

The layers of Ti-Fe 2 O 3 /In 2 O 3 were prepared on the different substrates using hydrothermal method: Ti/TiO 2 nanotubes, Ti foil, FTO and FTO/TiO 2. Materials were characterized using scanning electron microscopy, XRD, Raman, UV-Vis, and X-ray photoelectron spectroscopy and tested as photoanodes for water oxidation under illumination. The formation of heterojunction on the TiO 2 nanotubes increases photocurrent of water oxidation at 0.7 V vs. RHE to over 520 μA/cm2, while Ti/Ti-Fe 2 O 3 /In 2 O 3 , FTO/Ti-Fe 2 O 3 /In 2 O 3 , and FTO/TiO 2 /Ti-Fe 2 O 3 /In 2 O 3 exhibit 130, 31 and 152 μA/cm2, respectively. Thus, the work indicates that the presence of TiO 2 in the form of nanotubes as a substrate increases the efficiency of photocurrent generation. [Display omitted] • The layers of Ti-Fe 2 O 3 /In 2 O 3 were prepared on the different substrates using hydrothermal method. • The photoelectrochemical performance of electrodes was tested under simulated sun light illumination. • Therefore, the obtained material can successfully find application in the solar-assisted water decomposition process. [ABSTRACT FROM AUTHOR]