Foamy Photocathode with Cu<sub>2</sub>O Nanowire Arrays Decorated with Cu<sub>2</sub>O and Carbon Layer for Photoelectrochemical Hydrogen Evolution

Qu, Yuqi; Qian, Jiangrui; Liu, Jing; Yao, Li; Zhao, Liping; Song, Xuefeng; Zhang, Peng; Gao, Lian

doi:10.1149/2.0931910jes

Cited by 7 publications

(2 citation statements)

References 48 publications

(57 reference statements)

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“…In the literature, the properties of Cu 2 O have been engineered for increasing the charge diffusion length and improving the carrier transfer rate as well. There are various research methods to improve Cu 2 O performance such as doping, high temperature processing for enhancing the crystal quality, engineering an overlayer, and modifying the morphology to reduce the electron pathway length . Despite these efforts to improve the generation efficiency, the utilization of Cu 2 O still requires more research to improve its low photocurrent density in PEC cells.…”

Section: Introductionmentioning

confidence: 99%

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

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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.

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Section: Introductionmentioning

confidence: 99%

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

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“…Generally, Cu(OH) 2 nanorods are synthesized on Cu coated FTO/ITO substrate via anodization in KOH media followed by annealing at high temperatures. [19][20][21][22][23][24] Another method includes the usage of a porous template such as anodic aluminum oxide (AAO) to electrodeposit Cu 2 O thin films on conductive substrates. [25][26][27] Huang et al constructed Cu 2 O/CuO/TiO 2 core/shell nanowire array by electrodeposition of Cu 2 O on Cu nanowires synthesized via AAO template.…”

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confidence: 99%

Highly Porous Cu₂O Photocathode via Electrochemical Reconstruction of Dense Thin Films

Singh

Aggarwal

Das

et al. 2021

J. Electrochem. Soc.

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Nanostructured light absorbers in PEC devices offer enhanced charge carrier collection and increased active area compared to planar structures. This article describes a simple two-step electrochemical treatment to obtain such nanostructured films of Cu2O absorber layer. A dense Cu2O film is electrodeposited on FTO coated glass substrate at a potential of −0.35 V (vs Ag/AgCl). This precursor film is then subjected to voltage cycling in a potential range of −0.6 V to 0.6 V, resulting in reconstruction of the top 0.5 μm dense film to 10–30 nm thick nano-walled structure. The reason for this reconstruction is a concomitant etching of Cu2O as Cu2+ ions along with oxidation to CuO. A morphology preserving reduction of the porous CuO during the cathodic scan results in a nano-walled Cu2O. From linear sweep voltammetry of pristine Cu2O and CuO films, we find that reduction of Cu2O to Cu is a slow process in this potential range and hence, Cu-impurity is not observed up to 50 cycles. Such an approach offers production of phase pure nanostructured films comprising features as small as 10 nm without following any complex procedure. The reconstructed porous Cu2O shows > 50% enhancement in photocurrent over dense Cu2O.

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Integrated Carbon Layer and CoNiP Cocatalyst on SnWO₄ Film for Enhanced Photoelectrochemical Water Splitting

Zhang,

Qiu,

et al. 2024

ChemSusChem

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α‐SnWO4 is a promising semiconductor for solar water splitting, however, its performance is limited by weak water oxidation and poor charge transfer. In this study, we employ a vapor deposition method to uniformly implement a carbon layer onto the surface of SnWO4 coupled with a CoNiP cocatalyst, successfully constructing the integrated CoNiP/C/SnWO4 film photoanode and alleviating the oxidation of Sn2+ when loading electrocatalyst. Incorporating the carbon layer enhances the interface charge conduction behavior between the SnWO4 substrate and the CoNiP cocatalyst, thereby mitigating charge recombination. The synergistic interplay between the carbon layer and CoNiP leads to a remarkable achievement, as evidenced by the photocurrent of 1.72 mA cm−2 (1.23 V vs. RHE) observed for SnWO4 film measured in 0.2 M potassium phosphate buffer solution. In this work, we demonstrate the viability of tailoring SnWO4 photoanode and provide valuable insights for prospective advancements in modifying SnWO4 photoanode.

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Foamy Photocathode with Cu₂O Nanowire Arrays Decorated with Cu₂O and Carbon Layer for Photoelectrochemical Hydrogen Evolution

Cited by 7 publications

References 48 publications

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

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

Highly Porous Cu₂O Photocathode via Electrochemical Reconstruction of Dense Thin Films

Integrated Carbon Layer and CoNiP Cocatalyst on SnWO₄ Film for Enhanced Photoelectrochemical Water Splitting

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Foamy Photocathode with Cu2O Nanowire Arrays Decorated with Cu2O and Carbon Layer for Photoelectrochemical Hydrogen Evolution

Cited by 7 publications

References 48 publications

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

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

Highly Porous Cu2O Photocathode via Electrochemical Reconstruction of Dense Thin Films

Integrated Carbon Layer and CoNiP Cocatalyst on SnWO4 Film for Enhanced Photoelectrochemical Water Splitting

Contact Info

Product

Resources

About

Foamy Photocathode with Cu₂O Nanowire Arrays Decorated with Cu₂O and Carbon Layer for Photoelectrochemical Hydrogen Evolution

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

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

Highly Porous Cu₂O Photocathode via Electrochemical Reconstruction of Dense Thin Films

Integrated Carbon Layer and CoNiP Cocatalyst on SnWO₄ Film for Enhanced Photoelectrochemical Water Splitting