Facile fabrication and photoelectrochemical properties of a CuO nanorod photocathode with a ZnO nanobranch protective layer

Shaislamov, Ulugbek; Krishnamoorthy, Karthikeyan; Kim, Sang‐Jae; Chun, Wongee; Lee, Heon-Ju

doi:10.1039/c6ra18832j

Cited by 30 publications

(11 citation statements)

References 41 publications

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“…As for pure g-C 3 N 4 , no detectable increase for the photocurrent density was observed after the light was turned on. On the basis of Figure c, the maximum applied bias photon-to-current efficiency (η ABPE ) could be estimated on the basis of the following equation: where P is the incident light intensity (mW cm –2 ) and J ph is the measured photocurrent density at the applied bias potential (versus Ag/AgCl) (mA cm –2 ), while the minimum potential needed for water splitting equals 1.23 V thermodynamically. Hence, the maximum η ABPE values of g-C 3 N 4 and 3% CoP–CN were estimated to be 0.039 and 0.051%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Graphitic Carbon Nitride Decorated with CoP Nanocrystals for Enhanced Photocatalytic and Photoelectrochemical H₂ Evolution

Liu

Zhang

et al. 2019

Energy Fuels

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Polydispersed CoP nanoparticles in an orthorhombic phase were synthesized via a gas−solid reaction and then deposited over graphitic carbon nitride to build the CoP/g-C 3 N 4 (CoP−CN) heterostructure. Nanorod-like CoP nanoparticles with a length of 10−80 nm were connected to g-C 3 N 4 nanosheets to build an intimate face-to-face contact via their crystal planes of ( 011) and ( 211). This unique heterojunction hybrid exhibits superior photocatalytic and photoelectrochemical performances for H 2 evolution and photoelectrochemical response plus excellent overall water-splitting activity. The optimal sample of 3% CoP−CN composite achieved a superior hydrogen production rate at 1038.1 μmol h −1 g −1 when irradiated by simulated solar light, exhibiting a much higher photocurrent at 150 μA cm −2 compared to pure g-C 3 N 4 . Also, a larger anodic current density was detected during the photoelectrochemical hydrogen evolution reactions (PEC HERs) with enhanced applied bias photon-to-current efficiency, denoting a higher efficiency for PEC HER. The enhancements for photocatalytic and PEC HER activity are mainly attributed to the formation of intimate interfacial contact for better light absorption, stronger photoreductive potentials, and higher efficiency for charge separation and transfer. This study provides a proof-of-concept design and construction of effective cobalt-phosphide-based heterojunctions for hydrogen evolution and water-splitting applications.

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Section: Resultsmentioning

confidence: 99%

Graphitic Carbon Nitride Decorated with CoP Nanocrystals for Enhanced Photocatalytic and Photoelectrochemical H₂ Evolution

Liu

Zhang

et al. 2019

Energy Fuels

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“…To prepare pristine CuO photoelectrodes with different morphologies, several efforts have been conducted. The CuO can be prepared in the form of nanoparticles, [ 190 ] nanoleaves, [ 105 ] nanorods, [ 191–194 ] nanosheets, [ 195 ] nanowires, [ 196–199 ] flower‐like, [ 185 ] and nanofibers. [ 200 ] Preparing pristine CuO photoelectrodes with high photocurrent response and stability is of great importance because applying this approach obviates the need for preparing hybrid or doped structures.…”

Section: Photoelectrochemical Properties Of Pure Cuomentioning

confidence: 99%

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

et al. 2021

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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.

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“…CuO with a narrow bandgap of 1.3–1.7 eV can efficiently absorb visible light and generate high photocurrent. Especially for one-dimensional (1D) structures, CuO NWs and CuO nanorods (NRs) demonstrate more enhanced PEC performances than planar CuO. − Compared with Cu 2 O, CuO photocathode is more stable, but photocorrosion is still a major factor limiting its application. The stability of CuO can be improved by various methods, such as metallic element doping and constructing heterojunctions.…”

Section: Photocathode-driven Systemmentioning

confidence: 99%

An Overview of Solar-Driven Photoelectrochemical CO₂ Conversion to Chemical Fuels

Tang

Xiao

2022

ACS Catal.

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With accelerating consumption of nonrenewable energy resource, mankind is currently facing the dilemma of energy crisis and global warming caused by excessive greenhouse gas emissions. Photoelectrocatalytic (PEC) technique to convert the main greenhouse gas CO2 into hydrocarbon fuels can solve these two issues with one stone. Herein, we summarize the latest developments of semiconductor-based PEC CO2 reduction for solar fuels production in a more comprehensive manner. Our endeavors start with elucidation of the fundamental principles of CO2 reduction technology and influencing factors of PEC CO2 reduction technique, followed by specific introduction on four quintessentially designed PEC CO2 reduction systems, and then multifarious photoelectrodes utilized for these photosystems are systematically introduced. Modification rationales for crafting photoelectrodes with high conversion efficiency and good stability are elucidated. Besides, strategies developed for fine-tuning of selectivity of PEC CO2 reduction products are also discussed. Finally, future outlooks and challenges in this booming research field are reviewed. It is anticipated that our Review would provide enriched and guided information on rational construction of high-performance photoelectrodes for solar-to-chemical fuels conversion.

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Facile fabrication and photoelectrochemical properties of a CuO nanorod photocathode with a ZnO nanobranch protective layer

Abstract: Photoelectrochemical properties of CuO/ZnO photoelectrodes fabricated with nanorod and film structures were investigated and the effect of surface morphology on their photoelectrochemical performance was discussed in detail.

Cited by 30 publications

References 41 publications

Graphitic Carbon Nitride Decorated with CoP Nanocrystals for Enhanced Photocatalytic and Photoelectrochemical H₂ Evolution

Graphitic Carbon Nitride Decorated with CoP Nanocrystals for Enhanced Photocatalytic and Photoelectrochemical H₂ Evolution

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

An Overview of Solar-Driven Photoelectrochemical CO₂ Conversion to Chemical Fuels

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Facile fabrication and photoelectrochemical properties of a CuO nanorod photocathode with a ZnO nanobranch protective layer

Abstract: Photoelectrochemical properties of CuO/ZnO photoelectrodes fabricated with nanorod and film structures were investigated and the effect of surface morphology on their photoelectrochemical performance was discussed in detail.

Cited by 30 publications

References 41 publications

Graphitic Carbon Nitride Decorated with CoP Nanocrystals for Enhanced Photocatalytic and Photoelectrochemical H2 Evolution

Graphitic Carbon Nitride Decorated with CoP Nanocrystals for Enhanced Photocatalytic and Photoelectrochemical H2 Evolution

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

An Overview of Solar-Driven Photoelectrochemical CO2 Conversion to Chemical Fuels

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Graphitic Carbon Nitride Decorated with CoP Nanocrystals for Enhanced Photocatalytic and Photoelectrochemical H₂ Evolution

Graphitic Carbon Nitride Decorated with CoP Nanocrystals for Enhanced Photocatalytic and Photoelectrochemical H₂ Evolution

An Overview of Solar-Driven Photoelectrochemical CO₂ Conversion to Chemical Fuels