The photothermal effect of CQDs is introduced to promote the bulk charge transport and surface oxidation kinetics of Co-Pi/CQDs/Fe2O3/TiO2 photoanodes simultaneously, resulting in a remarkably enhanced PEC water splitting performance.
Photocatalytic nitrogen fixation is a desirable approach to future sustainable nitrogen conversion and might consider as a potential alternative to the traditional Haber-Bosch process. However, the activation of nitrogen molecules...
Spinel oxide materials have been widely used as oxygen evolution catalysts to enhance the photoelectrochemical (PEC) performance of photoelectrodes. Herein, we demonstrate that the water splitting efficiency of a photoanode can be further enhanced by introducing its photothermal effect. Under near-infrared radiation, the temperature of the NiCo 2 O 4 /BiVO 4 photoanode increases moderately, leading to improved water oxidation kinetics and charge transport simultaneously. With the assistance of the photothermal effect, the obtained photoanode reaches a photocurrent density of 6.20 mA cm −2 at 1.23 V vs reversible hydrogen electrode. A series of spineltype MCo 2 O 4 oxides (M = Mn, Zn, Cu, and Fe) are deposited on the surface of the BiVO 4 photoanode to show similar photothermally enhanced PEC performance. The research discovery provides a way for improving the catalytic activity of photoanode materials with a photothermal effect, which may be applied to various fields of energy conversion, including CO 2 reduction, N 2 fixation, and pollutant degradation.
TiO2 nanorods with oxygen vacancies are produced via a facial, controllable and scalable high energy electron beam irradiation treatment, resulting in a remarkable enhancement of photocurrent density of about 85.4% at 1.23 VRHE.
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