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Appendices

Figure A.1. A typical time course of photodeposition of the cocatalyst Ru on a

SrTiO3:La,Rh/Au/BiVO4plate. Reaction conditions: reactant solution, distilled water

(40 mL) containing RuCl33H2O (0.35 mol) without pH adjustment; light source,

300 W xenon lamp ( > 420 nm); irradiation area: 9 cm2.

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Figure A.2.The power spectra of the solar simulator used in the experiments and the

standard AM1.5D and AM1.5G.

Figure A.3.SEM images of (a) SrTiO3:La,Rh and (b) BiVO4powders.

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Figure A.4. The dependence of the photocatalytic activity of (SrTiO3:La,Rh)(BiVO4)

powder suspension systems on the amounts of SrTiO3:La,Rh and BiVO4. Catalysts:

520 mg each, reaction solution: 40 mL water adjusted to pH 3.5 with H2SO4; light

source, 300 W xenon lamp ( > 420 nm), irradiation area: 13 cm2. The gas evolution

rates were divided by the irradiation areas.

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Figure A.5. The dependence of the photocatalytic activity of

SrTiO3:La,Rh/Au/BiVO4plates on the thickness of gold layers. Reaction conditions:

reaction solution, distilled water (40 mL) without pH adjustment (pH 6.8); light

source, 300 W xenon lamp ( > 420 nm); irradiation area: 9 cm2. Photodeposition

process was carried out from an aqueous solution (40 mL) containing RuCl33H2O

(0.35 mol) without pH adjustment under 300 W xenon lamp ( > 420 nm)

illumination. The gas evolution rates were divided by the irradiation area.

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Figure A.6. (a) A diffuse-reflectance spectrum and (b) photograph of a Au layer

deposited on a glass plate by vacuum evaporation.

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Figure A.7.Mott-Schottky plots of a SrTiO3:La,Rh electrode. The measurement was

carried out under darkness at a frequency of 1 kHz with an AC amplitude of 10 mV in

a 0.1 M aqueous Na2SO4 solution at pH 6.8. Before the measurement, oxidation

reduction cycles was performed repeatedly to stabilize the surface of the

SrTiO3:La,Rh electrode.

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Figure A.8. Time course of H2 and O2 evolution during Z-scheme water splitting

using a SrTiO3:La,Rh/Au/BiVO4 plate after photodeposition. Reaction conditions:

reaction solution, distilled water (40 mL) without pH adjustment (pH 6.8); light

source, 300 W xenon lamp ( > 420 nm); irradiation area: 9 cm2. Photodeposition

process was carried out

from an aqueous solution (40 mL) containing RuCl33H2O

(0.35 mol) without pH adjustment under 300 W xenon lamp ( > 420 nm)

illumination.

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Table A.1. The number of incident photons from a Xe lamp through band-pass filters.

Central wavelength / nm The number of incident photons / photon h-1

417.2 2.61020

435.1 2.810

20

471.3 2.91020

499.6 2.71020