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. 2016 Dec 14;7:13380. doi: 10.1038/ncomms13380

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Copyright © 2016, The Author(s)

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(a) Steady-state I–V curves. (b) IPCEs at 1.23 V_RHE. (c) Stability test and (d) gas evolution from PEC water splitting of photoanodes at 1.15 V_RHE. The solid lines in d are calculated values that correspond to the measured photocurrent. Action spectra for (e) BiVO₄, (f) Fe₂O₃ and (g) HDP (BiVO₄||Fe₂O₃) showing correspondence between IPCE, light-harvesting efficiency (LHE) and transmittance. Photoanodes BiVO₄ and Fe₂O₃ denote NiOOH/FeOOH/H, 1% Mo:BiVO₄ and Ni₂FeO_x/H, TiO₂/0.5% Ti:Fe₂O₃, respectively. All data were obtained using an electrolyte of 1.0 M KCi at pH=9.2 under 1 sun illumination.