Pt@Cu2O/WO3 composite photocatalyst for enhanced photocatalytic water oxidation performance

Gong, Huihua; Zhang, Yifeng; Cao, Yue; Luo, Maolan; Feng, Zhicheng; Yang, Wenbin; Liu, Kewei; Cao, Hongmei; Yan, Haiyu

doi:10.1016/j.apcatb.2018.05.086

Cited by 107 publications

(31 citation statements)

References 35 publications

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“…This results in improvement of crystallinity of the samples prepared at higher sputtering power, which in turn lead to a reduction of defect density and enhancement of carrier concentration of the Cu 2 O films. As also shown here, the measured interplanar distance is around ≈0.246 nm which is ascribed to the (111) planes of Cu 2 O …”

Section: Resultssupporting

confidence: 81%

“…Photocorrosion instability under solar light illumination is one of the main challenges of Cu 2 O photocathodes for hydrogen evolution . Various coating materials such as TiO 2 , NiO, and WO 3 were intensively investigated and used to overcome the photocorrosion instability of Cu 2 O photocathodes . However, not much research was carried out to improve the photocorrosion stability of fabricated photocathodes by tuning the material properties of Cu 2 O.…”

Section: Introductionmentioning

confidence: 99%

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Highly Stable Nanocrystal Engineered Palladium Decorated Cuprous Oxide Photocathode for Hydrogen Generation

Masudy‐Panah

Khiavi²,

Katal

et al. 2019

Adv Materials Inter

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Photocorrosion stability and the discrepancy between optical absorption and carrier diffusion length of cuprous oxide (Cu2O) thin films are the main limiting factors for hydrogen evolution and practical applications of Cu2O photocathodes. In this paper, by nanocrystal engineering the Cu2O optical absorbing thin film, the photocorrosion stability can be significantly improved. Furthermore, palladium (Pd) nanostructures are used to both act as a cocatalysis and address the discrepancy between optical absorption and carrier diffusion length of cuprous oxide and improve the photocatalytic activity of Cu2O photocathodes. By tuning the crystal quality of thin Cu2O film and Pd nanostructures through controlling the sputtering power of Cu2O and in situ plasma of substrate, the impact of the degree of crystallinity of thin Cu2O film and Pd nanostructures on photocorrosion stability and photocatalytic activity of prepared photocathodes are investigated in detail. Systematic characterization of prepared samples by using X‐ray diffraction, high‐resolution transmission electron microscopy, and scanning electron microscope analysis indicates that improving the crystallinity of deposited Cu2O thin film and Pd nanostructures can significantly improve the photocorrosion stability and performance of Cu2O based photocathodes.

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Section: Resultssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Highly Stable Nanocrystal Engineered Palladium Decorated Cuprous Oxide Photocathode for Hydrogen Generation

Masudy‐Panah

Khiavi²,

Katal

et al. 2019

Adv Materials Inter

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show abstract

“…[13][14][15] Especially, they usually feature small band gaps for visible-light absorption without the decoration of any photo-sensitizers. 16,17 Nowadays, large numbers of researchers are aiming to develop Cu-based composites and have harvested many achievements in this regard. [18][19][20] Although these studies are very innovative, there is still a lot of room for improvement.…”

Section: Introductionmentioning

confidence: 99%

Facile thermal exfoliation of Cu sheets towards the CuO/Cu₂O heterojunction: a cost-effective photocatalyst with visible-light response for promising sustainable applications

Chen

2019

RSC Adv.

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“…Due to these unique physical and chemical properties, Cu‐based nanomaterials were employed as photocatalysts for splitting water to generate hydrogen. The hydrogen generation efficiency of pristine Cu‐based semiconductor photocatalysts (Cu 2 O, CuS, CuInS 2 , etc.) was very limited; however, this could mainly be attributed to the fast recombination rate of photo‐induced electron‐hole pairs.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Cu‐Based Cocatalysts toward Solar‐to‐Hydrogen Evolution: Categories and Roles

et al. 2019

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Solar-to-hydrogen production is one of the most promising solutions for global energy shortages and the environmental crisis because it utilizes solar energy to the fullest extent. Photocatalytically splitting water to hydrogen involves three crucial processes: solar light harvesting, charge separation/migration, and the catalytic H 2 production reaction. In the past few years, much attention is paid to investigating noble metal cocatalysts for solar photoreduction, but much less attention is paid to transition metal-based cocatalysts. Nevertheless, great and significant advances are achieved using a copperbased cocatalyst for solar-to-hydrogen evolution, as it possesses a suitable binding energy for the hydrogen intermediate according to density functional theory calculations. This review summarizes recent studies and progress on the copper-based cocatalytic materials as well as discusses the roles and functional mechanisms for photocatalytic H 2 evolution. It begins with discussing basic principles for the use of cocatalysts for photocatalytic hydrogen evolution and points out opportunities to use non-noble metal cocatalysts for hydrogen evolution. Then, it explains the construction and structural features of a photocatalysis system with semiconductor-Cu-based cocatalyst, and how the functional mechanisms work to enhance the hydrogenproduction-related reactions. Finally, some challenges and perspectives are also given to promote further exploration of this emerging research area. Usually, the following three parts are considered: 1) improving

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Pt@Cu2O/WO3 composite photocatalyst for enhanced photocatalytic water oxidation performance

Cited by 107 publications

References 35 publications

Highly Stable Nanocrystal Engineered Palladium Decorated Cuprous Oxide Photocathode for Hydrogen Generation

Highly Stable Nanocrystal Engineered Palladium Decorated Cuprous Oxide Photocathode for Hydrogen Generation

Facile thermal exfoliation of Cu sheets towards the CuO/Cu₂O heterojunction: a cost-effective photocatalyst with visible-light response for promising sustainable applications

Recent Advances in Cu‐Based Cocatalysts toward Solar‐to‐Hydrogen Evolution: Categories and Roles

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Pt@Cu2O/WO3 composite photocatalyst for enhanced photocatalytic water oxidation performance

Cited by 107 publications

References 35 publications

Highly Stable Nanocrystal Engineered Palladium Decorated Cuprous Oxide Photocathode for Hydrogen Generation

Highly Stable Nanocrystal Engineered Palladium Decorated Cuprous Oxide Photocathode for Hydrogen Generation

Facile thermal exfoliation of Cu sheets towards the CuO/Cu2O heterojunction: a cost-effective photocatalyst with visible-light response for promising sustainable applications

Recent Advances in Cu‐Based Cocatalysts toward Solar‐to‐Hydrogen Evolution: Categories and Roles

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Facile thermal exfoliation of Cu sheets towards the CuO/Cu₂O heterojunction: a cost-effective photocatalyst with visible-light response for promising sustainable applications