Carbon‐Coated Hematite Electrodes with Enhanced Photoelectrochemical Performance Obtained through an Electrodeposition Method with a Citric Acid Additive

Abstract

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Key Strategies to Advance the Photoelectrochemical Water Splitting Performance of α‐Fe2O3 Photoanode

“…As mentioned, the passivation of the α‐Fe 2 O 3 surface by depositing a thin overlayer of metal oxides, metal hydroxides, graphene, g‐C 3 N 4 , etc ., has a great impact on the charge separation as well as charge transfer enhancement across the solid‐liquid interface. There are different theories to explain the role of the passivation layer in improving the PEC water oxidation performance , ,. Yang et al .…”

Significant Enhancement of the Photoelectrochemical Activity of CuWO4 by using a Cobalt Phosphate Nanoscale Thin Film

“…Metal oxides have been extensively studied for water oxidation due to their high stability under solar illumination and earth‐abundancy. Semiconductors such as TiO 2 , BiVO 4 , WO 3 , and Fe 2 O 3 are the most widely studied metal oxides for PEC water splitting . Very recently, another n‐type semiconductor, copper tungstate (CuWO 4 ), has generated great research interest as a robust and inexpensive photocatalyst, as it has an ideal bandgap (Eg) of approximately 2.2 eV and a large visible light absorption range.…”

Effects of Additives on Kinetics, Morphologies and Lead-Sensing Property of Electrodeposited Bismuth Films

“…This work considers three additivesa complexant (citric acid), a surface inhibitor (poly­(vinyl alcohol)) and a grain refiner (betaine)in an acidic nitrate bath. Citric acid has long been used in electrodeposition of metals and alloys for its ability to complex metal ions as citrates thereby influencing reduction kinetics. − Poly­(vinyl alcohol) is chosen as an additive because of its known ability to improve adhesion of films, facilitate uniform film formation, increase of nuclei density, reduction of grain size, and because of its green and nontoxic nature. , It is seen that the introduction of these additives improves the adhesion of the deposits and significantly enhances the response of the electrodeposited films in ultratrace detection of heavy metals such as lead.…”