2019
DOI: 10.1038/s42004-019-0156-x
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Nanostructured bismuth vanadate/tungsten oxide photoanode for chlorine production with hydrogen generation at the dark cathode

Abstract: Photoelectrooxidation of chloride ions to chlorine with co-production of hydrogen by water reduction has been proposed as a means of decreasing the net solar hydrogen production cost. So far, however, most such solar-to-chlorine production systems use cost-prohibitive materials and/or show rather small faradaic yield or stability. Here we report the development of earth-abundant, nanostructured bismuth vanadate/tungsten oxide (BiVO 4 /WO 3 ) photoanode assemblies that operate in acidic sodium chloride solution… Show more

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Cited by 19 publications
(10 citation statements)
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“… As evidenced by the significantly increased photocurrent density (2.9 mA cm –2 at 1.6 V vs RHE) and cathodic shift of onset potential (Figure b), the decoration of CoPi is an effective way to further enhance the water oxidation ability of the photoanode. It should be pointed out that due to the strongly coupled heterostructured interfaces, the (WO 3 /BiVO 4 )-OV/CoPi photoanode even exhibits a superior photocurrent density than some reported WO 3 -based photoanodes, which has been summarized in Table S1. , …”
Section: Results and Discussionmentioning
confidence: 91%
“… As evidenced by the significantly increased photocurrent density (2.9 mA cm –2 at 1.6 V vs RHE) and cathodic shift of onset potential (Figure b), the decoration of CoPi is an effective way to further enhance the water oxidation ability of the photoanode. It should be pointed out that due to the strongly coupled heterostructured interfaces, the (WO 3 /BiVO 4 )-OV/CoPi photoanode even exhibits a superior photocurrent density than some reported WO 3 -based photoanodes, which has been summarized in Table S1. , …”
Section: Results and Discussionmentioning
confidence: 91%
“…Recently, photoelectrolysis of a yet more concentrated 4 m NaCl solution acidified to pH 1 at a BiVO 4 photoanode coated with a thin (20 nm) layer of amorphous WO 3 has been reported to produce chlorine with up to 85% (on average 74%) Faradaic efficiency . The WO 3 coating served as a corrosion protection of the BiVO 4 absorber film and apparently as a catalyst allowing Cl 2 formation with maximum photocurrent density of 2.8 mA cm −2 attained under 1 sun illumination at 1.6 V versus RHE (≈1.34 V vs Ag/AgCl).…”
mentioning
confidence: 99%
“…Another study employed a thin amorphous WO 3 to protect BiVO 4 photoanode in concentrated 4 m NaCl solution at pH 1. [ 152 ] Upon illumination, photogenerated holes in BiVO 4 are driven to the surface of amorphous WO 3 films to oxidize chloride ions to Cl 2 . Indeed, electrons provided from the oxidation step are transferred through an external circuit to a dark Pt cathode for hydrogen production.…”
Section: Chlorine Oxidation Reactionmentioning
confidence: 99%
“…It could produce high photocurrent-to-Cl 2 of 2.5 mA cm −2 at 1.42 V versus RHE and obtain FE(Cl 2 ) at 85%, FE(H 2 ) at 100%. [152] The other study utilized TiO 2 /BiVO 4 heterostructure as photoanode integrating with BiOI cathode to drive PEC Cl-recovery cell and release Cl 2 , H 2 as value-added products. [153] ClER achieved a current density of 1 mA cm −2 in 0.6 m NaCl electrolyte at ≈0.39 V versus Ag/AgCl though there was no detailed report about the amount of Cl 2 and H 2 gas produced from the PEC process.…”
Section: Chlorine Oxidation Reactionmentioning
confidence: 99%