Exposed area dependent PEC performance of BiVO4 photoanodes for solar water splitting

#Data set of "Exposed area dependent PEC performance of BiVO4 photoanodes for solar water splitting"

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## GENERAL INFORMATION

1. Data set title: "Exposed area dependent PEC performance of BiVO4 photoanodes for solar water splitting"

2.Authorship:    Name: Christian Robles   Institution: Institute of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain   ORCID: 0000-0003-1166-2950

   Name: Laura Montañés   Institution: Institude of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain   ORCID: 0000-0002-1076-013X       Name: Camilo A. Mesa   Institution: Institude of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain   ORCID: 0000-0002-8450-2563

   Name: Ana Gutiérrez-Blanco   Institution: Institude of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain   ORCID: 0000-0001-9412-2321

   Name: Francisco Fabregat-Santiago   Institution: Institude of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain    ORCID: 0000-0002-7503-1245

   Name: Agustín O Alvarez   Institution: Institude of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain    ORCID:0000-0002-0920-5390

   Name: Sixto Giménez   Institution: Institude of Advanced Materials (INAM), Universitat Jaume I, 12006, Castelló, Spain   ORCID: 0000-0002-4522-3174   Email:

##FILE DESCRIPTION---------------

### Figure 1-Fig1a.txt : Average photocurrent–voltage (J–V) plots measured by back illumination in 0.1 M KPi with 0.1 M Na2SO3 for the different exposed areas. Dark currents are represented as dashed lines.-Fig1b.txt : Chronoamperometry plot measured by back illumination in 0.1 M KPi with 0.1 M Na2SO3 for the three exposed areas. Inset:  BiVO4 photoanodes synthetized by electrochemical deposition and thermal evaporation.  The area was delimited using an epoxy resin.-Fig1c.txt : Average of current–voltage (J–V) plots measured by back illumination in 0.1 M KPi with 0.1 M Na2SO3 for an equal to exposed area of 1 cm2 (black), 0.2 cm2 (green) and a photoanode of 1 cm2 with a reduced exposed area of 0.2 cm2 (blue). 

### Figure 2-Fig2a.txt : Charge-transfer resistance (Rct) as a function of applied potential extracted from IS.-Fig2b.txt : Capacitance as a function of applied potential extracted from IS.-Fig2c.txt : Series Resistance (Rc) as a function of the applied potential extracted from IS.-Fig2d.txt : Density of surface states (DOS) as a function of applied potential extracted from IS.-Fig2e.txt : IR-chopped chronoamperometry measurements at 1.2 V vs RHE.-Fig2f.txt : Mobility of electrons (blue), diffusion resistance (green) and recombination resistance (red) as function of the exposed area extracted from the fitting of IMPS, IMVS and IMVS.

### Figure S3-FigS3a.txt : Current–voltage (J–V) plots measured in 0.1 M KPi (red) and 0.1 M KPi with 0.1 M Na2SO3 (blue).-FigS3b.txt : Current–voltage (J–V) plots measured by front illumination (light blue) and back illumination (dark blue) in 0.1 M KPi with 0.1 M Na2SO3.

### Figure S4-FigS4a.txt : Incident-photon to current efficiency (IPCE) under back illumination measured and 0.1 M KPi with 0.1 M Na2SO3.-FigS4b.txt : optical absorbance  of the BiVO4 photoanode and its obtained bandgap (2.47 eV) extracted from the Tauc plot for a indirect transition.

###Figure S5-FigS5a.txt : Raman spectra for the 0.2 cm2 exposed area before measuring. Colours represent different spots measured in the same sample.-FigS5b.txt : Raman spectra for the 0.4 cm2 exposed area before measuring. Colours represent different spots measured in the same sample.-FigS5c.txt : Raman spectra for the 1 cm2 exposed area before measuring. Colours represent different spots measured in the same sample.-FigS5d.txt : Raman spectra for the 0.2 cm2 exposed area after measuring. Colours represent different spots measured in the same sample.-FigS5e.txt : Raman spectra for the 0.4 cm2 exposed area after measuring. Colours represent different spots measured in the same sample.-FigS5f.txt : Raman spectra for the 1 cm2 exposed area after measuring. Colours represent different spots measured in the same sample.