Dataset for "Strategies for Deposition of LaFeO3 Photocathodes: Improving Photocurrent with a Polymer Template"

Dataset for "Strategies for Deposition of LaFeO3 Photocathodes: Improving Photocurrent with a Polymer Template"

LaFeO3 (LFO) has been shown to be an active photocathode for solar water splitting on illumination of visible light, but is restricted by low surface area and relatively low photocurrents achieved. The work herein utilizes a variety of different film deposition methods for LFO photocathodes. Doctor blading of LFO powders (LFO-A), milling and exfoliation of LFO powders deposited by spray pyrolysis (LFO-B), deposition of LFO nitrate precursors by spray pyrolysis (LFO-C) and spin coating of LFO nitrates with a polymer template (Triton X-100) (LFO-D). This dataset includes characterisation of these LFO films including, XRD, XPS, photoelectrochemical measurements and electronic impedance spectroscopy measurements. Datasets are also included from those incorporated within the supplementary information.

Keywords:
Photoelectrochemical water splitting, Photocathodes, Perovskite oxides, Hydrogen generation, Thin films
Subjects:

Cite this dataset as:
Freeman, E., Kumar, S., Celorrio, V., Park, M., Kim, J., Fermín, D., Eslava, S., 2019. Dataset for "Strategies for Deposition of LaFeO3 Photocathodes: Improving Photocurrent with a Polymer Template". Bath: University of Bath Research Data Archive. Available from: https://doi.org/10.15125/BATH-00526.

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Data

Figure%201%20%2 ... %20dataset.xlsx
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X-ray diffraction data for films LFO-A, -B, -C and -D. Handling: Plot 2theta (x-axis) against intensity (y-axis)

Figure%203%20%2 ... %20dataset.xlsx
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Photoelectrochemcial measurements (potential vs current density plots), stability study, incident-to-current efficiency (IPCE) and electrochemically active surface area (ECSA) measurements. Handling: PEC measurements-plot applied potential (x-axis) against current density (y-axis) PEC stability-plot time (x-axis) against current density (y-axis) IPCE-plot wavelength (x-axis) against IPCE (y-axis) ECSA-plot potential (x-axis) against current density (y-axis)

Figure%204%20%2 ... %20dataset.xlsx
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet (104kB)
Creative Commons: Attribution 4.0

Electronic impedance measurements (EIS) and RC limited and experimental photocurrent measurements. Handling: EIS-plot Z' (x-axis) against Z'' (y-axis) RC limited and experimental transients-plot time (x-axis) against current density (y-axis)

Supplementary%2 ... %20dataset.xlsx
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UV-Vis, IPCE, XPS, PEC (pH study), PEC (N2 purge), CV (ECSA), PEC (H2) Handling: For UV-Vis plot energy (x-axis) against (FR*eV)^3/2 (y-axis). For XPS spectra plot binding energy (x-axis) against intensity. For PEC measurements plot applied potential (x-axis) against photocurrent density (y-axis)

Creators

Emma Freeman
University of Bath

Santosh Kumar
University of Bath

Verónica Celorrio
University of Bristol

Min Su Park
Yonsei University

Jong Hak Kim
Yonsei University

David J. Fermín
University of Bristol

Coverage

Collection date(s):

From 3 October 2016 to 1 October 2019

Documentation

Data collection method:

X-ray diffraction patterns, and photoelectrochemical measurements for samples LFO-A, LFO-B, LFO-C and LFO-D of prepared LaFeO3 films on FTO-ABS glass slides were obtained.

Technical details and requirements:

XRD diffraction patterns were obtained from a STOE STADI P double setup, equipped with Mythen detectors, using pure Cu-Kα1 radiation (λ= 1.540562 Å) with a range of 2θ from 20 to 80°. PEC measurements were carried out in a three electrode PEC quartz cell with working electrode, Pt counter electrode, an Ag/AgCl reference electrode, and a 0.1 M Na2SO4 electrolyte of pH 12. A 300 W Xe lamp equipped with an AM1.5G solar simulator filter (LOT Quantum Design) was used with an 8mm-diameter masked area. The intensity was measured to be 100 mW cm-2 determined by the distance to the working electrode. An external potential (provided by Ivium CompactStat) was linearly swept from 0.2 to -1.12 VAg/AgCl at a rate of 20 mVs-1 under chopped solar illumination. Stability measurements were held at held at 0.43 VRHE for 1 h. IPCE measurements were conducted at 0.29 VRHE. Electronic impedance spectroscopy (EIS) measurements for RC limited current calculations were carried out in 0.1 M NaSO4 with a DC of -0.3 VAgCl and AC potential frequency range 105-0.1 Hz with an amplitude of 5 mV under dark conditions. Experimental transient photocurrents were obtained under chopped illumination (1 sun) at 0.3 VAgCl with a data collection interval of 0.01 s. Electrochemically active surface area (ECSA) measurements were carried out by conducting cyclic voltammetry (CV) between 0.2 to -0.3 VAgCl at varying scan rates between 10 and 250 mV s-1. The difference in anodic and cathodic current densities recorded at -0.03 VAgCl was plotted against scan rate. The double layer capacitance (Cdl) can be calculated by dividing the gradient by two, where Cdl is directly proportional to the ECSA.

Funders

Engineering and Physical Sciences Research Council (EPSRC)
https://doi.org/10.13039/501100000266

Nanostructured Metal Oxides for Solar Fuels
EP/P008097/1

Publication details

Publication date: 26 November 2019
by: University of Bath

Version: 1

DOI: https://doi.org/10.15125/BATH-00526

URL for this record: https://researchdata.bath.ac.uk/id/eprint/526

Related articles

Freeman, E., Kumar, S., Celorrio, V., Park, M. S., Kim, J. H., Fermin, D. J. and Eslava, S., 2020. Strategies for the deposition of LaFeO3 photocathodes: improving the photocurrent with a polymer template. Sustainable Energy & Fuels. Available from: https://doi.org/10.1039/C9SE01103J.

Contact information

Please contact the Research Data Service in the first instance for all matters concerning this item.

Contact person: Emma Freeman

Departments:

Faculty of Engineering & Design
Chemical Engineering