Improving photo-stability and charge transport properties of Cu2O/CuO for photo-electrochemical water splitting using alternate layers of WO3 or CuWO4 produced by the same route

Jamali, Soolmaz; Moshaii, Ahmad

doi:10.1016/j.apsusc.2017.04.228

Cited by 34 publications

(18 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Especially in the region of 450–850 nm, the absorption of the Cu 2 O/CuO samples are remarkably higher than that of the bare Cu 2 O film. The second factor for PEC improvement is the better chemical stability of CuO in the electrolyte media relative to Cu 2 O and this leads to more photocurrent by the Cu 2 O/CuO samples as shown in Figure and is confirmed by other researchers …”

Section: Photoelectrochemical Measurementssupporting

confidence: 74%

See 1 more Smart Citation

Improvement of Photoelectrochemical and Stability Properties of Electrodeposited Cu₂O Thin Films by Annealing Processes

Jamali

Moshaii

Mohammadian

2017

Physica Status Solidi (a)

Self Cite

View full text Add to dashboard Cite

The synthesization of Cu2O thin films by electrodeposition for photoelectrochemical water splitting is reported. The synthesized Cu2O samples are annealed at different temperatures between 300 and 500 °C. The XRD analysis and SEM images indicate that the sample without annealing includes Cu2O grains with pyramid shape. With annealing to more than 300 °C, due to the oxidization of the sample, a thin layer of CuO appears on the original Cu2O film and the crystalline signatures of such CuO structure increase with annealing at higher temperatures. The photoelectrochemical measurements indicate that annealing pure Cu2O by more than 300 °C, remarkably increases the photocurrent achieved from this photocathode. The effect is accompanied with considerable improvement of chemical stability of the original Cu2O electrode during water splitting. Such protection effect, which is originated from generation of CuO on the samples, increases with the annealing temperature up to 500 °C. However, the best photocurrent from the Cu2O/CuO composite is obtained from the annealing temperature of about 400 °C. The results of impedance analysis of various annealed samples indicate that annealing at a higher temperature, better charge transfer occurs both at the interface of photocathode/electrolyte and inside the photocathode.

show abstract

Section: Photoelectrochemical Measurementssupporting

confidence: 74%

“…Several methods have been used to improve chemical stability of Cu 2 O photoelectrodes including covering the Cu 2 O surface with an n‐type semiconductor . Also, it has been reported that a thin film of CuO on the Cu 2 O photocathode can considerably protect it in the PEC experiments .…”

Section: Introductionmentioning

confidence: 99%

Improvement of Photoelectrochemical and Stability Properties of Electrodeposited Cu₂O Thin Films by Annealing Processes

Jamali

Moshaii

Mohammadian

2017

Physica Status Solidi (a)

Self Cite

View full text Add to dashboard Cite

show abstract

“…Both are absorption peaks by the Cu 2 O layer, verified by the bandgap (1.6 to 2.2 eV) of Cu 2 O with an absorption wavelength range from 563 to 775 nm. The obtained bandgap is in the range of reported values in the literature . Even though sample 3 and 4 have a Cu 2 O layer with similar thickness, the absorption peak by the Cu 2 O layer in sample 4 is not noticeable.…”

Section: Resultssupporting

confidence: 67%

“…The obtained bandgap is in the range of reported values in the literature. [16][17][18] Even though sample 3 and 4 have a Cu 2 O layer with similar thickness, the absorption peak by the Cu 2 O layer in sample 4 is not noticeable. In sample 3, the absorption peak by Cu 2 O can be weakly observed (Figure 3 inset).…”

Section: Resultsmentioning

confidence: 98%

“…[10][11][12][13][14][15] Cu 2 O is a p-type semiconductor material with a band gap of 1.6-2.2 eV, absorbance in the visible light range (563-775 nm), and a suitable band edge alignment that is amenable for generating chemical energy. [16][17][18] In a PEC device, the absorbed sunlight at the Cu 2 O surface generates excited electrons by reducing protons to hydrogen gas at the interface between the photoelectrode and the electrolyte. [10,11,[13][14][15] Cu 2 O has a theoretical hydrogen conversion efficiency of 18 % in PEC cells and a power conversion efficiency of 20 % in a solar cell.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cu₂O Photocathode with Faster Charge Transfer by Fully Reacted Cu Seed Layer to Enhance Performance of Hydrogen Evolution in Solar Water Splitting Applications

et al. 2019

View full text Add to dashboard Cite

In this work, we study the effect of Cu2O film obtained from a fully reacted Cu seed layer as a photoelectrode in photoelectrochemical cells. The full reaction of the Cu layer shows an enhanced photocurrent density and improved efficiency in hydrogen evolution. The photocurrent density of textured Cu2O (0.58 mA cm−2 at 0 V vs. RHE), without an unreacted Cu layer is two times higher than films containing an unreacted Cu layer (0.29 mA cm−2 at 0 V vs. RHE), under AM 1.5 illumination (100 mW cm−2). The thickness of the unreacted Cu layer influences significantly the charge transfer process at the interface between the Cu2O and electrolyte. The enhanced photoelectrochemical performance of textured Cu2O is attributed to the reduced charge recombination resulting from a longer carrier lifetime in the Cu2O layer. Experimentally we confirmed that the unreacted Cu layer inhibits the photoelectrochemical performance of Cu2O‐based photocathodes. The elimination of the unreacted Cu layer leads to higher photocurrent density.

show abstract

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

et al. 2021

View full text Add to dashboard Cite

The cost‐effective, robust, and efficient electrocatalysts for photoelectrochemical (PEC) water‐splitting has been extensively studied over the past decade to address a solution for the energy crisis. The interesting physicochemical properties of CuO have introduced this promising photocathodic material among the few photocatalysts with a narrow bandgap. This photocatalyst has a high activity for the PEC hydrogen evolution reaction (HER) under simulated sunlight irradiation. Here, the recent advancements of CuO‐based photoelectrodes, including undoped CuO, doped CuO, and CuO composites, in the PEC water‐splitting field, are comprehensively studied. Moreover, the synthesis methods, characterization, and fundamental factors of each classification are discussed in detail. Apart from the exclusive characteristics of CuO‐based photoelectrodes, the PEC properties of CuO/2D materials, as groups of the growing nanocomposites in photocurrent‐generating devices, are discussed in separate sections. Regarding the particular attention paid to the CuO heterostructure photocathodes, the PEC water splitting application is reviewed and the properties of each group such as electronic structures, defects, bandgap, and hierarchical structures are critically assessed.

show abstract

Improving photo-stability and charge transport properties of Cu2O/CuO for photo-electrochemical water splitting using alternate layers of WO3 or CuWO4 produced by the same route

Cited by 34 publications

References 41 publications

Improvement of Photoelectrochemical and Stability Properties of Electrodeposited Cu₂O Thin Films by Annealing Processes

Improvement of Photoelectrochemical and Stability Properties of Electrodeposited Cu₂O Thin Films by Annealing Processes

Cu₂O Photocathode with Faster Charge Transfer by Fully Reacted Cu Seed Layer to Enhance Performance of Hydrogen Evolution in Solar Water Splitting Applications

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

Contact Info

Product

Resources

About

Improving photo-stability and charge transport properties of Cu2O/CuO for photo-electrochemical water splitting using alternate layers of WO3 or CuWO4 produced by the same route

Cited by 34 publications

References 41 publications

Improvement of Photoelectrochemical and Stability Properties of Electrodeposited Cu2O Thin Films by Annealing Processes

Improvement of Photoelectrochemical and Stability Properties of Electrodeposited Cu2O Thin Films by Annealing Processes

Cu2O Photocathode with Faster Charge Transfer by Fully Reacted Cu Seed Layer to Enhance Performance of Hydrogen Evolution in Solar Water Splitting Applications

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

Contact Info

Product

Resources

About

Improvement of Photoelectrochemical and Stability Properties of Electrodeposited Cu₂O Thin Films by Annealing Processes

Improvement of Photoelectrochemical and Stability Properties of Electrodeposited Cu₂O Thin Films by Annealing Processes

Cu₂O Photocathode with Faster Charge Transfer by Fully Reacted Cu Seed Layer to Enhance Performance of Hydrogen Evolution in Solar Water Splitting Applications