Recent Advances in the Use of Silicon-Based Photocathodes for Solar Fuel Production

Mohamed, Ahmad M.; Shaheen, Basamat S.; Mohamed, Aya M.; Amer, Ahmad W.; Allam, Nageh K.

doi:10.1007/978-3-319-69703-1_9

Cited by 5 publications

(4 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Amongst the markets most benefitting from these capabilities is that of nanostructured photocatalysis, where the large surface areato-volume ratio maximizes the number of active sites onto which reactions may take place. [1][2][3] Consequently, efforts to create thinner films, 4 smaller nanoparticles, 5 and shorter nanotubes 6,7 for photocatalytic applications, such as photoelectrochemical cells, have increased in the past couple of years. Such endeavors pave the way towards developing the most efficient photocatalyst structures.…”

Section: Introductionmentioning

confidence: 99%

On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO₂nanostructures: experimental insights

Soliman

Haron

Samir

et al. 2018

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

Black TiO is being widely investigated due to its superior optical activity and potential applications in photocatalytic hydrogen generation. Herein, the limitations of the hydrogenation process of TiO nanostructures are unraveled by exploiting the fundamental tradeoffs affecting the overall efficiency of the water splitting process. To control the nature and concentration of defect states, different reduction rates are applied to sub-100 nm TiO nanotubes, chosen primarily for their superiority over their long counterparts. X-Ray Photoelectron Spectroscopy disclosed changes in the stoichiometry of TiO with the reduction rate. UV-vis and Raman spectra showed that high reduction rates promote the formation of the rutile phase in TiO, which is inactive towards water splitting. Furthermore, electrochemical analysis revealed that such high rates induce a higher concentration of localized electronic defect states that hinder the water splitting performance. Finally, incident photon-to-current conversion efficiency (IPCE) highlighted the optimum reduction rate that attains a relatively lower defect concentration as well as lower rutile content, thereby achieving the highest conversion efficiency.

show abstract

Section: Introductionmentioning

confidence: 99%

On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO₂nanostructures: experimental insights

Soliman

Haron

Samir

et al. 2018

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, the fluctuating nature of solar and wind energy (green and renewable) necessitates integrating them with energy storage devices. , Functional devices, such as supercapatteries, also called hybrid supercapacitors, can bridge the energy density gap between symmetric supercapacitors and batteries, while keeping distinguishable power rates . Ensuring such promising metrics, especially in a solid-state assembly, would render the practical scale-up of the supercapattery storage devices over their other energy storage counterparts. − Thereby, decent efforts have been devoted to optimizing the device components, including but not limited to the positive battery electrode of the hybrid device. − …”

Section: Introductionmentioning

confidence: 99%

Optimized Fabrication of Bimetallic ZnCo Metal–Organic Framework at NiCo-Layered Double Hydroxides for Multiple Storage and Capability Synergy All-Solid-State Supercapacitors

Mohamed

Sayed

Allam

2023

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Rational design and structural regulation of hybrid nanomaterials with superior electrochemical performance are crucial for developing sustainable energy storage platforms. Among these materials, NiCo-layered double hydroxides (NiCo-LDHs) demonstrate an exceptional charge storage capabilities owing to their tunable 2D lamellar structure, large interlayer spacing, and rich redox electrochemically active sites. However, NiCo-LDHs still suffer from sever agglomeration of their particles with limited charge transfer rates, resulting in an inadequate rate capability. In this study, bimetallic ZnCo-metal organic framework (MOF) tripods were grown on the surface of NiCo-LDH nanowires, which significantly reduced the self-agglomeration and stacking of the NiCo-LDH nanowire arrays, offering more accessible active sites for charge transfer and shortening the path for ion diffusion.

show abstract

“…The depletion of fossil fuels and the ascending demand for energy to cope with the technological advancements have prioritized the development of efficient, sustainable, and environmentally friendly energy conversion and storage strategies. − Among these strategies, supercapacitors (SCs) are the most outstanding energy storage platforms . Compared to traditional capacitors, SCs can deliver higher specific energy.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic Co–W–S Chalcogenides Confined in N,S-Codoped Porous Carbon Matrix Derived from Metal–Organic Frameworks for Highly Stable Electrochemical Supercapacitors

Mohamed

Naga

Zaki

et al. 2020

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

Transition-metal dichalcogenides are gaining much interest in the energy storage sector due to the two-dimensional (2D) nature and conductivity of the materials. However, single transition-metal dichalcogenides are not stable, preventing their practical use in real devices. Herein, we demonstrate the synthesis of binary metal dichalcogenides (Co−W−S) via carbonization of zeolitic imidazolate framework (ZIF-67), a subclass of metal−organic frameworks, encapsulated with phosphotungstic acid (PTA@ZIF-67). The morphology and surface functional groups of the as-synthesized Co−W−S composite are characterized via field-emission scanning electron microscopy (FESEM), highresolution transmission electron microscopy (HRTEM), and Fourier transform infrared (FTIR) spectroscopy. Furthermore, the crystal structure and elemental composition of the fabricated Co−W−S composite are elucidated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses. Upon testing its electrochemical performance as a supercapacitor electrode, the fabricated Co−W−S@N,S-codoped porous carbon (N,S-PC) shows exceptional specific capacitance (1929 F g −1 at 5 mV s −1 ). Furthermore, the constructed asymmetric supercapacitor device using Co−W−S@N,S-PC and activated carbon as positive and negative poles, respectively, displays superior energy density and power density of 32.9 Wh kg −1 and 700.2 W kg −1 , respectively, with high Columbic efficiency over 10 000 charge/discharge cycles at 10 A g −1 .

show abstract

Recent Advances in the Use of Silicon-Based Photocathodes for Solar Fuel Production

Cited by 5 publications

References 74 publications

On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO₂nanostructures: experimental insights

On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO₂nanostructures: experimental insights

Optimized Fabrication of Bimetallic ZnCo Metal–Organic Framework at NiCo-Layered Double Hydroxides for Multiple Storage and Capability Synergy All-Solid-State Supercapacitors

Bimetallic Co–W–S Chalcogenides Confined in N,S-Codoped Porous Carbon Matrix Derived from Metal–Organic Frameworks for Highly Stable Electrochemical Supercapacitors

Contact Info

Product

Resources

About

Recent Advances in the Use of Silicon-Based Photocathodes for Solar Fuel Production

Cited by 5 publications

References 74 publications

On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO2nanostructures: experimental insights

On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO2nanostructures: experimental insights

Optimized Fabrication of Bimetallic ZnCo Metal–Organic Framework at NiCo-Layered Double Hydroxides for Multiple Storage and Capability Synergy All-Solid-State Supercapacitors

Bimetallic Co–W–S Chalcogenides Confined in N,S-Codoped Porous Carbon Matrix Derived from Metal–Organic Frameworks for Highly Stable Electrochemical Supercapacitors

Contact Info

Product

Resources

About

On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO₂nanostructures: experimental insights

On the relationship between rutile/anatase ratio and the nature of defect states in sub-100 nm TiO₂nanostructures: experimental insights