Modified Si nanowire/graphite-like carbon nitride core-shell photoanodes for solar water splitting

Ning, Minghui; Chen, Zhe; Li, Lin; Meng, Qi; Chen, Zhihong; Zhang, Yongguang; Jin, Mingliang; Zhang, Zhang; Yuan, Mingzhe; Wang, Xin; Zhou, Guofu

doi:10.1016/j.elecom.2017.12.010

Cited by 14 publications

(7 citation statements)

References 34 publications

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“…For these reasons, Si is more often used as a photocathode, and heterostructuring is a necessary strategy for Si to be used in a PEC photoanode . The high versatility of Si for the preparation of nanostructures has also made it an excellent scaffold for nanostructuring other SCs like Bi 2 MoO 6 or g-C 3 N 4 . A recent report has shown that TiO 2 -coated Si NWs, decorated with Fe 2 O 3 nanothorns, can achieve a photocurrent density of 3.5 mA cm –2 at a bias of 1.23 V RHE .…”

Section: Nanomaterial-based Systems For Photoelectrochemical Energy C...mentioning

confidence: 99%

“…323 The high versatility of Si for the preparation of nanostructures has also made it an excellent scaffold for nanostructuring other SCs like Bi 2 MoO 6 324 or g-C 3 N 4 . 325 A recent report has shown that TiO 2 -coated Si NWs, decorated with Fe 2 O 3 nanothorns, can achieve a photocurrent density of 3.5 mA cm −2 at a bias of 1.23 V RHE . 326 This good performance is enabled by a wider solar absorption and a good match between the TiO 2 and Fe 2 O 3 energy-band levels.…”

Section: Nanomaterial-based Systems Formentioning

confidence: 99%

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Noble-Metal-Free Multicomponent Nanointegration for Sustainable Energy Conversion

et al. 2021

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Global energy and environmental crises are among the most pressing challenges facing humankind. To overcome these challenges, recent years have seen an upsurge of interest in the development and production of renewable chemical fuels as alternatives to the nonrenewable and high-polluting fossil fuels. Photocatalysis, photoelectrocatalysis, and electrocatalysis provide promising avenues for sustainable energy conversion. Single-and dual-component catalytic systems based on nanomaterials have been intensively studied for decades, but their intrinsic weaknesses hamper their practical applications. Multicomponent nanomaterial-based systems, consisting of three or more components with at least one component in the nanoscale, have recently emerged. The multiple components are integrated together to create synergistic effects and hence overcome the limitation for outperformance. Such higher-efficiency systems based on nanomaterials will potentially bring an additional benefit in balance-of-system costs if they exclude the use of noble metals, considering the expense and sustainability. It is therefore timely to review the research in this field, providing guidance in the development of noble-metal-free multicomponent nanointegration for sustainable energy conversion. In this work, we first recall the fundamentals of catalysis by nanomaterials, multicomponent nanointegration, and reactor configuration for water splitting, CO 2 reduction, and N 2 reduction. We then systematically review and discuss recent advances in multicomponent-based photocatalytic, photoelectrochemical, and electrochemical systems based on nanomaterials. On the basis of these systems, we further laterally evaluate different multicomponent integration strategies and highlight their impacts on catalytic activity, performance stability, and product selectivity. Finally, we provide conclusions and future prospects for multicomponent nanointegration. This work offers comprehensive insights into the development of cost-competitive multicomponent nanomaterial-based systems for sustainable energy-conversion technologies and assists researchers working toward addressing the global challenges in energy and the environment.

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Section: Nanomaterial-based Systems For Photoelectrochemical Energy C...mentioning

confidence: 99%

Section: Nanomaterial-based Systems Formentioning

confidence: 99%

Noble-Metal-Free Multicomponent Nanointegration for Sustainable Energy Conversion

et al. 2021

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“…Peng et al utilized a gold‐sensitized n‐Si/n‐ZnO core/shell NW array photoanode to achieve unbiased water splitting 65 3A,B) 68 . Due to the improved light reflection, scattering, and interference, the nanowires based on Si core showed higher light absorptance compared to the planar Si substrate, The length and diameter of n‐Si NWs prepared by metal‐catalyzed electroless etching are about 4 μm and 100 nm, respectively.…”

Section: Strategies For Enhancing Pec Performancementioning

confidence: 99%

Section: Strategies For Enhancing Pec Performancementioning

confidence: 99%

Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

Cheng

Zhang

Chen

et al. 2022

Energy Science & Engineering

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Si, as a narrow bandgap semiconductor with a broadband absorption for sunlight, is considered to be a very competitive photoelectrode material for solar-driven photoelectrochemical (PEC) water splitting. However, there are major barriers in construction of efficient and stable Si-based PEC cell, including low photovoltage, sluggish reaction kinetics, and poor stability in electrolytes. This review focuses on the strategies to solve these issues and summarizes recent progress. The working principles of PEC water splitting are first introduced. Then the strategies for improving Si-based photoelectrode performances are discussed, including (1) the regulation of Si surface morphology for enhancing light harvesting, (2) band structure engineering strategies to reduce recombination of photogenerated carriers, and (3) modification of protection layers for long stability and loading cocatalysts on Si-based photoelectrodes for accelerating water splitting. Lastly, we have presented some issues of Si-based photoelectrode materials, which should be addressed in future research.

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“…[9] PEC performance could be improved with suitable material compositions and carefully designed structures during the fabrication of composite photoelectrodes. [10][11][12][13] Black phosphorus (BP) is a metal free two-dimensional (2D) promising nanomaterial with unique electronic and optoelectronic properties, which include high electron mobility (ca. 1000 cm 2 /(V s)), an excellent light absorption, and high specific surface area.…”

Section: Introductionmentioning

confidence: 99%

Water Splitting Performance Enhancement of the TiO₂ Nanorod Array Electrode with Ultrathin Black Phosphorus Nanosheets

Wang

Jin

et al. 2019

ChemElectroChem

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Metal free two‐dimensional (2D) semiconductor nanomaterial black phosphorus (BP) is a promising photocatalyst for solar H2 evolution. Here, ultrathin BP nanosheets were prepared through organic salt sodium citrate assisted exfoliation of bulk BP. Further, an efficient photoelectrode for photoelectrochemical water splitting was developed based on TiO2 nanorod arrays, coated with ultrathin black phosphorus nanosheets. Compared to the pure TiO2 nanorod arrays, this structure exhibits reduced photoluminescent emission, longer carrier lifetime, and a strong photocurrent density enhancement of about 140 %. The high photoelectrochemical performance indicated the formed 2D‐1D BP/TiO2 heterostructure facilitates the charge separation and transfer. The interfacial interactions between black phosphorus and TiO2 were thoroughly investigated with XPS and FTIR spectroscopy.

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Modified Si nanowire/graphite-like carbon nitride core-shell photoanodes for solar water splitting

Cited by 14 publications

References 34 publications

Noble-Metal-Free Multicomponent Nanointegration for Sustainable Energy Conversion

Noble-Metal-Free Multicomponent Nanointegration for Sustainable Energy Conversion

Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

Water Splitting Performance Enhancement of the TiO₂ Nanorod Array Electrode with Ultrathin Black Phosphorus Nanosheets

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Modified Si nanowire/graphite-like carbon nitride core-shell photoanodes for solar water splitting

Cited by 14 publications

References 34 publications

Noble-Metal-Free Multicomponent Nanointegration for Sustainable Energy Conversion

Noble-Metal-Free Multicomponent Nanointegration for Sustainable Energy Conversion

Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

Water Splitting Performance Enhancement of the TiO2 Nanorod Array Electrode with Ultrathin Black Phosphorus Nanosheets

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Water Splitting Performance Enhancement of the TiO₂ Nanorod Array Electrode with Ultrathin Black Phosphorus Nanosheets