Facile fabrication and efficient photoelectrochemical water-splitting activity of electrodeposited nickel/SiC nanowires composite electrode

Jiang, Min; Liu, Zhaoxiang; Ding, Lijuan; Chen, Jianjun

doi:10.1016/j.catcom.2017.04.003

Cited by 23 publications

(10 citation statements)

References 31 publications

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“…The same group successively developed different photoelectrode composites where SiC NWs were combined with cheaper co-catalysts such as SnO 2 620 and metallic nickel. 621 In both cases, the authors found an enhancement in the hydrogen evolution rate with respect to bare SiC due to a synergistic effect between SiC and metals that improved their lightutilization capacity preventing the recombination of photoexcited electron−hole pairs. In particular, the hydrogen evolution rate of SnO 2 /SiC NWs in acidic media was 4 times higher than that of pristine SiC NWs, while Ni NPs, due to their lower Fermi level, captured the photogenerated electrons in the conductive band of SiC nanowires with holes remaining in SiC VB.…”

Section: Photochemical Processesmentioning

confidence: 96%

“…The same group successively developed different photoelectrode composites where SiC NWs were combined with cheaper co-catalysts such as SnO 2 and metallic nickel . In both cases, the authors found an enhancement in the hydrogen evolution rate with respect to bare SiC due to a synergistic effect between SiC and metals that improved their light-utilization capacity preventing the recombination of photoexcited electron–hole pairs.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

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Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

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There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics (e.g. Al2O3, SiO2, TiO2, and aluminosilicates–zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. For instance, oxides are easily corroded by acids or bases, and carbon is not resistant to oxidation. Therefore, these carriers cannot be recycled. Moreover, the poor thermal conductivity of metal oxide carriers often translates into permanent alterations of the catalyst active sites (i.e. metal active-phase sintering) that compromise the catalyst performance and its lifetime on run. Therefore, the development of new carriers for the design and synthesis of advanced functional catalytic materials and processes is an urgent priority for the heterogeneous catalysis of the future. Silicon carbide (SiC) is a non-oxide semiconductor with unique chemicophysical properties that make it highly attractive in several branches of catalysis. Accordingly, the past decade has witnessed a large increase of reports dedicated to the design of SiC-based catalysts, also in light of a steadily growing portfolio of porous SiC materials covering a wide range of well-controlled pore structure and surface properties. This review article provides a comprehensive overview on the synthesis and use of macro/mesoporous SiC materials in catalysis, stressing their unique features for the design of efficient, cost-effective, and easy to scale-up heterogeneous catalysts, outlining their success where other and more classical oxide-based supports failed. All applications of SiC in catalysis will be reviewed from the perspective of a given chemical reaction, highlighting all improvements rising from the use of SiC in terms of activity, selectivity, and process sustainability. We feel that the experienced viewpoint of SiC-based catalyst producers and end users (these authors) and their critical presentation of a comprehensive overview on the applications of SiC in catalysis will help the readership to create its own opinion on the central role of SiC for the future of heterogeneous catalysis.

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Section: Photochemical Processesmentioning

confidence: 96%

Section: Catalytic Applicationsmentioning

confidence: 99%

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

et al. 2021

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“…SiC nanowires (NWs) have many unique characteristics, such as high thermal conductivity, high mechanical strength, super‐plasticity, excellent oxidation resistance, great field emission performance, excellent electrical and optical properties . These properties make SiC NWs a promising candidate material for many applications, such as reinforcement material for ceramics/metals, field‐emission devices, hydrogen sensor, and photoelectrocatalysts etc. Until now, SiC NWs have been synthesized in the high vacuum closed system by various techniques, for instance, carbon nanotube template, chemical vapor deposition, sol‐gel process, thermal evaporation, carbothermal reduction and molten salt method etc.…”

Section: Introductionmentioning

confidence: 99%

Catalytic synthesis of SiC nanowires in an open system

et al. 2019

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SiC nanowires (NWs) are usually synthesized in a closed vacuum reaction system which limits the yield of SiC NWs. In this work, SiC NWs and carbon nanotubes were synthesized in an open tube furnace at 1550°C with Si powder as silicon sources, ethanol as carbon sources and ferrocene as catalyst. The as‐synthesized products were ultralong β‐SiC NWs with the diameter about 80‐100 nm and the length up to several tens micrometers. The diameter of the carbon nanotubes was about 20‐30 nm. The carbon nanotube yarns about 20 cm in length were obtained at the end of the tube furnace. The growth mechanism of SiC NWs and carbon nanotubes were proposed. Compared with the traditional synthetic techniques in the high vacuum closed system, the novel synthesis method in the open system provided a new approach to the synthesis of SiC NWs.

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“…However, 3C-SiC suffers from a similar problem as other semiconductors, that is, rapid recombination of photogenerated electron-hole pairs as well as low surface activation ability [ 14 , 15 ]. To overcome the limitations, various metals have been adopted as co-catalysts supported on the surface of the semiconductor, serving as highly active sites for water decomposition for the improvement of the charge separation of semiconductor [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Pt-Co Alloys-Loaded Cubic SiC Electrode with Improved Photoelectrocatalysis Property

et al. 2017

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A novel composite photocatalyst was synthesized by loading 5 wt % of platinum cobalt alloy on 3C-SiC nanowires and powder (Pt-Co-SiC) respectively via a simple polyol reduction method. Pt-Co-SiC were comprehensively characterized by SEM, HRTEM, XRD, PL, and XPS. The results indicated that Pt-Co nanoparticles in the size of 2–5 nm were dispersed homogeneously in the SiC nanowires and powders. The photocurrent response of the Pt-Co-SiC increased remarkably with increasing Pt content and the best performance was observed with the sample of Pt3Co-SiC. Especially, the Pt3Co-SiC nanowires photoelectrode exhibited improved cathodic current density (0.14 mA·cm−2) under the simulated sunlight, which was about 10 times higher than the Pt3Co-SiC powders. The H2 production rate for the Pt3Co-SiC nanowires is 30 times more than that of the pure SiC nanowires. The enhancement of the Pt-Co-SiC properties could be ascribed to the fact that more visible light was harvested and the photogenerated electron and the interfacial electron transfered more easily.

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Facile fabrication and efficient photoelectrochemical water-splitting activity of electrodeposited nickel/SiC nanowires composite electrode

Cited by 23 publications

References 31 publications

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Catalytic synthesis of SiC nanowires in an open system

Pt-Co Alloys-Loaded Cubic SiC Electrode with Improved Photoelectrocatalysis Property

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