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TiO 2 nanocrystallites with titanium (IV) fluoride treatment were fabricated and studied as dye sensitized solar cells photoanode. F doping into pre-existing mesoporous TiO 2 is achieved by a simple hydrolysis method. Overall photo-to-current conversion-efficiency of the device could be enhanced up to 23% due to the increase of photocurrent density, fill factor and open-circuit voltage, compared with undoped TiO 2 . From electrochemical impedance measurements, we deduce that the presence of F dopants enhances cell performance by improving the charge transport and retarding the recombination process in the photoanode. [ABSTRACT FROM AUTHOR]

The development of highly efficient and stable anode electrocatalysts is highly demanding and challenging in seawater electrocatalysis for industrial application. Herein, we have constructed C, N co-doped mesoporous Co-based hybrid phosphates via a facile glucose-mediated regulation. The optimal C4-2-0.5Glu-550 by calcination at a mild temperature exhibits superior OER performance in 1.0 M KOH seawater with an overpotential of 296 mV at 10 mA cm−2 and a Tafel slope of 109 mV dec−1 as well as long-term stability (for at least 19 h). Combined with structural characterization, its excellent electrocatalytic performance should be attributed that the proper heteroatom doping regulates its electronic structure, correspondingly, adjusts the adsorption strength of the intermediates, in addition, its open porous structure increases exposed active sites and facilitates the electrons/mass transfer and the adsorption of reactants, above all, the carbon layer formed by the introduction of glucose significantly improves its corrosion resistance, further enhancing its performance in alkaline realistic seawater. [Display omitted] [ABSTRACT FROM AUTHOR]