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Scalable one-step assembly of an inexpensive photoelectrode for water oxidation by deposition of a Ti- and Ni-containing molecular precursor on nanostructured WO3.

Lai YH, King TC, Wright DS, Reisner E - Chemistry (2013)

Bottom Line: Photoactive in one step!A nanocomposite water-oxidation photocatalyst was assembled by a straightforward and one-step spin-coating procedure of a Ti- and Ni-containing molecule on nanostructured WO3.The photoanode oxidizes water to O2 with good activity and stability in alkaline solution, and thereby features light absorption, charge separation and water-oxidation catalysis (see scheme).

View Article: PubMed Central - PubMed

Affiliation: Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW (UK).

No MeSH data available.


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a) Photocurrent responses at various potentials and b) the Nyquist plots at an applied potential of 0.84 V versus RHE of i) an unmodified nanoWO3 electrode and ii) a nanoWO3/TiNi electrode under standardized solar-light irradiation (AM 1.5 G, 100 mW cm−2) in an aqueous Bi solution (0.1 m, pH 9.2).
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fig04: a) Photocurrent responses at various potentials and b) the Nyquist plots at an applied potential of 0.84 V versus RHE of i) an unmodified nanoWO3 electrode and ii) a nanoWO3/TiNi electrode under standardized solar-light irradiation (AM 1.5 G, 100 mW cm−2) in an aqueous Bi solution (0.1 m, pH 9.2).

Mentions: Studying the photocurrents of the nanoWO3 electrodes at different potentials at pH 9.2 provided a more comprehensive understanding of the TiNi modification, in particular of the efficiency for photo-water oxidation at a low over-potential. The bare nanoWO3 electrode showed an onset photocurrent at 0.74 V versus RHE and the photocurrent increases by applying a more positive potential (Figure 4 a, trace i). The photocurrent saturates at approximately 500 μA cm−2 at 1.34 V versus RHE.


Scalable one-step assembly of an inexpensive photoelectrode for water oxidation by deposition of a Ti- and Ni-containing molecular precursor on nanostructured WO3.

Lai YH, King TC, Wright DS, Reisner E - Chemistry (2013)

a) Photocurrent responses at various potentials and b) the Nyquist plots at an applied potential of 0.84 V versus RHE of i) an unmodified nanoWO3 electrode and ii) a nanoWO3/TiNi electrode under standardized solar-light irradiation (AM 1.5 G, 100 mW cm−2) in an aqueous Bi solution (0.1 m, pH 9.2).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3814423&req=5

fig04: a) Photocurrent responses at various potentials and b) the Nyquist plots at an applied potential of 0.84 V versus RHE of i) an unmodified nanoWO3 electrode and ii) a nanoWO3/TiNi electrode under standardized solar-light irradiation (AM 1.5 G, 100 mW cm−2) in an aqueous Bi solution (0.1 m, pH 9.2).
Mentions: Studying the photocurrents of the nanoWO3 electrodes at different potentials at pH 9.2 provided a more comprehensive understanding of the TiNi modification, in particular of the efficiency for photo-water oxidation at a low over-potential. The bare nanoWO3 electrode showed an onset photocurrent at 0.74 V versus RHE and the photocurrent increases by applying a more positive potential (Figure 4 a, trace i). The photocurrent saturates at approximately 500 μA cm−2 at 1.34 V versus RHE.

Bottom Line: Photoactive in one step!A nanocomposite water-oxidation photocatalyst was assembled by a straightforward and one-step spin-coating procedure of a Ti- and Ni-containing molecule on nanostructured WO3.The photoanode oxidizes water to O2 with good activity and stability in alkaline solution, and thereby features light absorption, charge separation and water-oxidation catalysis (see scheme).

View Article: PubMed Central - PubMed

Affiliation: Christian Doppler Laboratory for Sustainable SynGas Chemistry, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW (UK).

No MeSH data available.


Related in: MedlinePlus