Nanostructured inorganic metal oxide/metal–organic framework-based electrodes for energy technologies

Koyale, Pramod A.; Panda, Dillip K.; Delekar, Sagar D.

doi:10.1016/b978-0-323-85705-5.00012-9

Cited by 3 publications

(3 citation statements)

References 118 publications

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“…Nanostructured zinc oxide (ZnO) is one of the widely deployed metal oxides for photoelectrochemical (PEC) water splitting, which possesses an easy synthesis protocol, diverse structures/morphologies, appropriate position of band energy levels, high conductivity, stability, and abundant as well as nontoxic nature. − Among different morphologies, ZnO nanorods (NRs) own a remarkable and ultrafast photoelectric gain, wide coverage light confinement, no grain boundaries, better electrochemical properties, etc. , Hence, in connection with PEC water splitting studies, ZnO NRs have been employed with excellent significance by research communities . However, the wide band gap (∼3.1 to 3.3 eV) of ZnO NRs and associated challenges, such as insufficient light absorption in the visible region, low electron mobility, and slow charge transfer kinetics, have been identified as limitations for PEC water splitting technologies. , To overcome such issues, one of the promising strategies is to amend the bare ZnO competently with various organic as well as inorganic materials . Such modification can potentially lead to more efficient and effective photoelectrodes for water splitting applications.…”

Section: Introductionmentioning

confidence: 99%

“…6 However, the wide band gap (∼3.1 to 3.3 eV) of ZnO NRs and associated challenges, such as insufficient light absorption in the visible region, low electron mobility, and slow charge transfer kinetics, have been identified as limitations for PEC water splitting technologies. 2,7 To overcome such issues, one of the promising strategies is to amend the bare ZnO competently with various organic as well as inorganic materials. 8 Such modification can potentially lead to more efficient and effective photoelectrodes for water splitting applications.…”

Section: Introductionmentioning

confidence: 99%

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ZnO Nanorod/Multiwalled Carbon Nanotube Composites Sensitized with Cu-Based Metal–Organic Frameworks as Photoanodes for Solar-Driven Water Splitting

Koyale,

Kulkarni,

Gunjakar

et al. 2024

ACS Appl. Nano Mater.

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This research investigates the photoelectrochemical (PEC) water splitting capabilities of Cu-based metal−organic framework (MOF)-sensitized one-dimensional (1D) metal oxide nanostructures, specifically zinc oxide (ZnO) nanorod (NR)/ multiwalled carbon nanotube (MWCNT) nanocomposites (ZC NCs). This study involves the synthesis of ZnO NRs as well as ZC NCs with varying content of MWCNTs (from 0.05 to 0.25 wt %) via the sol−gel technique, followed by a comprehensive analysis of their structural, optical, and surface properties. The incorporation of MWCNTs with ZnO revealed the enhanced optical and surface characteristics and high concentration of oxygen vacancies in ZC NCs as evidenced by electron spin resonance (ESR) analysis, contributing to improved PEC performance. Thereafter, binder-free thin films of the synthesized materials were deposited using the doctor-blade technique, and then, PEC water splitting performance was assessed through various electrochemical techniques. Herein, the PEC performance of ZC-0.1 NCs (with 0.1 wt % MWCNTs) was 4.5 times superior to that of bare ZnO NRs. Subsequently, the optimized ZC-0.1 NCs were further sensitized with CH 3 −Cu-BTC MOFs, forming ternary ZC-0.1/CH 3 −Cu-BTC NCs. For these ternary NCs, an impressive current density was observed (2.57 mA/cm 2 ), nearly 9 times greater than that of pristine ZnO NRs (1.23 V) vs the reversible hydrogen electrode (RHE) and almost double that of ZC-0.1 NCs. Furthermore, the designed photoanode is stable over time, which was predicted and forecasted through the time series analysis (TSA) model. The higher PEC performance for ternary NCs was justified through surface topography, morphological, and contact angle studies to analyze the surface nature and its hydrophilicity. Hence, the present work demonstrates the systematic roadmap for a PEC water splitting study using valuable insights for the design and optimization of nanostructured metal oxides, photoactive organic moieties, and their composites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ZnO Nanorod/Multiwalled Carbon Nanotube Composites Sensitized with Cu-Based Metal–Organic Frameworks as Photoanodes for Solar-Driven Water Splitting

Koyale,

Kulkarni,

Gunjakar

et al. 2024

ACS Appl. Nano Mater.

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“…It is also responsible for the photocurrent efficiency of the device as it transports photo-induced electrons from the excited dye molecules adsorbed on its surface. 24,25 The engineering of TiO 2 nanostructures for designing binary/ternary hybrids overcomes the shortcomings of bare TiO 2 nanostructures, such as inadequate light absorption from the solar spectrum, inexpensive, nontoxic materials with a high dielectric constant and chemical stability, etc. 26 Hence, such modifications of TiO 2 nanostructures with other moieties have increased vital interest in solar energy harvesting studies.…”

Section: Introductionmentioning

confidence: 99%

Design and photovoltaic studies of W@TiO₂/rGO nanocomposites with polymer gel electrolyte

Pawar,

Koyale,

Ghodake

et al. 2023

New J. Chem.

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Catalysts for Photoelectrochemical H2 Production

Koyale,

Patil,

Sadavar

et al. 2024

Advances in Photocatalysis, Electrocatalysis and Photoelectrocatalysis for Hydrogen Production

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This chapter provides an overview of catalysts in photoelectrochemical (PEC) hydrogen production, focusing on their design, characteristics, and applications. It starts with an introduction to PEC H2 production and the need for catalysts. The main section discusses various catalysts, such as nanostructured metal oxides, metal–organic frameworks, perovskites, chalcogenides, and MXenes, emphasizing their unique properties and roles in enhancing the PEC performance. The chapter also addresses challenges in commercializing the PEC H2 production and explores prospects in catalyst development. The conclusion comprises key insights and suggests pathways for advancing PEC technology, highlighting the chapter’s importance to the scientific community.

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Nanostructured inorganic metal oxide/metal–organic framework-based electrodes for energy technologies

Cited by 3 publications

References 118 publications

ZnO Nanorod/Multiwalled Carbon Nanotube Composites Sensitized with Cu-Based Metal–Organic Frameworks as Photoanodes for Solar-Driven Water Splitting

ZnO Nanorod/Multiwalled Carbon Nanotube Composites Sensitized with Cu-Based Metal–Organic Frameworks as Photoanodes for Solar-Driven Water Splitting

Design and photovoltaic studies of W@TiO₂/rGO nanocomposites with polymer gel electrolyte

Catalysts for Photoelectrochemical H2 Production

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Nanostructured inorganic metal oxide/metal–organic framework-based electrodes for energy technologies

Cited by 3 publications

References 118 publications

ZnO Nanorod/Multiwalled Carbon Nanotube Composites Sensitized with Cu-Based Metal–Organic Frameworks as Photoanodes for Solar-Driven Water Splitting

ZnO Nanorod/Multiwalled Carbon Nanotube Composites Sensitized with Cu-Based Metal–Organic Frameworks as Photoanodes for Solar-Driven Water Splitting

Design and photovoltaic studies of W@TiO2/rGO nanocomposites with polymer gel electrolyte

Catalysts for Photoelectrochemical H2 Production

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Design and photovoltaic studies of W@TiO₂/rGO nanocomposites with polymer gel electrolyte