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Photoelectrochemical (PEC) water splitting is an emerging way for the production of H2, which has the ability to reduce the dependence on fossil fuels for the power generation and provide an ecologically safe storage of solar energy. Fabrication of photoelectrode is one of the major challenges to make PEC water splitting more effective and efficiently sustainable. In this article, we have focussed on the studies of antimony (Sb)-incorporated ZnO photoelectrodes and their evident effects in boosting the PEC water splitting activities using different concentrations of Sb incorporated on fluorine-doped tin oxide (FTO) via aerosol-assisted chemical vapour deposition method (AACVD). The as-deposited photoelectrodes were characterized by using different techniques and were applied for the water splitting. The incorporated thin films exhibited better light absorbance in the visible range, probably because of the generation of extra energy levels through metal incorporation. An enhanced PEC water splitting performance was observed by Sb-incorporated ZnO photoelectrodes as compared to pure ZnO. More specifically, 15% Sb-incorporated ZnO attained a photocurrent density of 0.99 mA cm−2 at 0.85 V vs. Ag/AgCl and maximum photo-stability that is quite greater as compared to pure ZnO (0.19 mA cm−2). This improvement was stated by the reduced bandgap and multifaceted morphological aspects of Sb-incorporated ZnO. In the production of simple and low-cost synthetic methods and effective electrode materials for PEC water splitting applications, these results are proved to be very helpful. [ABSTRACT FROM AUTHOR]

Herein, we report the synthesis of Cr incorporated ZnO sheets arrays microstructures and construction of photoelectrode through a direct aerosol assisted chemical vapour deposition (AACVD) method. The as-prepared Cr incorporated ZnO microstructures were characterized by transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, powdered X-ray spectroscopy, X-ray photoelectron spectroscopy and UV-Vis diffused reflectance spectroscopy. The Cr incorporation in ZnO red shifted the optical band gap of as-prepared photoanodes. The 15% Cr incorporation in ZnO has shown enhanced PEC performance. The AACVD method provides an efficient in situ incorporation approach for the manipulation of morphological aspects, phase purity, and band structure of photoelectrodes for an enhanced PEC performance. [ABSTRACT FROM AUTHOR]

In this work, we present an effective and facile approach for deposition of zinc oxide, and nickel incorporated zinc oxide thin films to fabricate photoanode of photoelectrochemical cell. Incorporation of Ni2+ in the host ZnO matrix results in the dramatic shape evolution of the resulting films from simple bullet like structures to complex punch like microstructures with increased estimated electrochemically active surface area. In addition to the role of Ni2+ in structure determination, it significantly enhanced the photoelectrochemical performance by improving the charge transport properties and conductivity of the parent host matrix. This work demonstrates a move towards tailoring functional properties of the films via controlled incorporation of different ionic species. This simple incorporation scheme can further be applied to attain a variety of compositionally tunable unique structures for desired applications by judiciously adjusting precursor choices and manipulating relative concentrations of the incorporated precursors during growth. Unlabelled Image • Highly conformal uniform thin film deposition on glass/FTO substrates demonstrated by AACVD • ZnO thin films doped with Ni2+ in 2%, 5%, 10% and 15% by AACVD successfully deposited • Photoanodes were then fabricated and PEC activity was performed. • Photoanode (15% nickel incorporated @ZnO) showed highest PEC activity. [ABSTRACT FROM AUTHOR]