Fabrication of the heterostructured CsTaWO6/Au/g-C3N4 hybrid photocatalyst with enhanced performance of photocatalytic hydrogen production from water

Lang, Junyu; Liu, Mengqing; Su, Yiguo; Yan, Lijuan; Wang, Xiaojing

doi:10.1016/j.apsusc.2015.08.150

Cited by 56 publications

(11 citation statements)

References 54 publications

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“…Furthermore, Figure c–f shows the high-resolution spectra of C 1s, N 1s, B 1s, and Ni 2p. The strong peak at 284.6 eV in Figure c is attributed to C–C coordination of standard reference carbon, and the peaks at 285.1 and 288.3 eV correspond to the C–(N)3 group and C–N–C, respectively. , The strong peak appearing in the high-resolution image of N 1s as shown in Figure d presents the N-replaced aromatic rings (C–NC), and peaks ascribed to tertiary nitrogen groups (N–(C)3) and charging effects can be found at 401.2 and 404.3 eV, respectively. , The peak at 399.9 eV (C–BN 2 groups) demonstrates that some boron atoms are brought into the g-C 3 N 4 frame. , As shown in Figure e, B 1s can be deconvoluted into three peaks with binding energies at 190.1, 191.8, and 192.8 eV. The binding energy at 190.1 eV corresponds to h-BN groups .…”

Section: Resultsmentioning

confidence: 97%

Enhancement of Hydrogen Evolution Reaction Performance of Graphitic Carbon Nitride with Incorporated Nickel Boride

Cao

Zhang

Qin

et al. 2018

ACS Sustainable Chem. Eng.

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Graphitic carbon nitride (g-C3N4) functioning as a semiconductor catalyst and sustainable and clean energy carrier to substitute fossil energy is gaining the attention of researchers. Hydrogen is regarded as the right energy carrier to meet future conditions, and hence, developing hydrogen economy is intensively investigated for its great electrocatalytic property. However, it is blocked as an electrocatalyst due to its poor conductivity and electrochemical activity. Therefore, to conquer such shortcomings, changing the nanostructure and increasing active sites are studied. Here, we report a facile method by incorporation of nickel boride (Ni2B) nanoparticles into bulk g-C3N4 to enlarge the specific surface area, exfoliate the layers, and improve the electronic conductivity. The obtained catalysts exhibit better hydrogen evolution reaction (HER) performance with a low onset overpotential of 300 mV, a Tafel slope of 221 mV dec–1, and an overpotential of 707 mV at the current density of 10 mA cm–2, superior to original g-C3N4 which demonstrates that Ni2B-decorated g-C3N4 is an illuminating method to enhance the HER performance. This work also provides a reference for g-C3N4 based catalyst working in broader field.

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Section: Resultsmentioning

confidence: 97%

Enhancement of Hydrogen Evolution Reaction Performance of Graphitic Carbon Nitride with Incorporated Nickel Boride

Cao

Zhang

Qin

et al. 2018

ACS Sustainable Chem. Eng.

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“…It is generally believed that the co‐catalysts as traps can extract the energetic enough electrons and holes that migrate to the surface of the semiconductor without recombination, provide reaction active sites, stimulate the elctrocatalytic reduction and oxidation of the reactants adsorbed on their surface with the lowered overpotentials, and further decrease the activation energy for gas evolution . So far, various types of H 2 ‐evolution co‐catalysts, including noble metals/alloys (Pt, Au, Ag), graphene, earth‐abundant transition metals and their composites (e.g., Ni, MoS 2 , WS 2 , NiS x , CoS x , CoO x , Ni 2 P, NiO x , and Ni(OH) 2 ) have been available for different semiconductors, which generally exhibit very low electrochemical H 2 ‐evolution onset overpotentials (<−0.4 V). Meanwhile, the noble metal based oxides (e.g., RuO 2 , IrO x ), cost‐acceptable cobalt based species (e.g., CoO x , Co(II), Co(OH) 2 , Nocera Co–Pi), MnO x FeOOH, and NiOOH have been demonstrated to be excellent water‐oxidation co‐catalysts to boost the photocatalytic O 2 evolution over different semiconductors.…”

Section: Fundamental Mechanism Of Heterogeneous Photocatalysismentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

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917

401

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In recent years, heterogeneous photocatalysis has received much research interest because of its powerful potential applications in tackling many important energy and environmental challenges at a global level in an economically sustainable manner. Due to their unique optical, electrical, and physicochemical properties, various 2D graphene nanosheets-supported semiconductor composite photocatalysts have been widely constructed and applied in different photocatalytic fields. In this review, fundamental mechanisms of heterogeneous photocatalysis, including thermodynamic and kinetics requirements, are first systematically summarized. Then, the photocatalysis-related properties of graphene and its derivatives, and design rules and synthesis methods of graphene-based composites are highlighted. Importantly, different design strategies, including doping and sensitization of semiconductors by graphene, improving electrical conductivity of graphene, increasing eloectrocatalytic active sites on graphene, strengthening interface coupling between semiconductors and graphene, fabricating micro/nano architectures, constructing multi-junction nanocomposites, enhancing photostability of semiconductors, and utilizing the synergistic effect of various modification strategies, are thoroughly summarized. The important applications including photocatalytic pollutant degradation, H production, and CO reduction are also addressed. Through reviewing the significant advances on this topic, it may provide new opportunities for designing highly efficient 2D graphene-based photocatalysts for various applications in photocatalysis and other fields, such as solar cells, thermal catalysis, separation, and purification.

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“…The CB of CsTaWO 6 is composed of the W 5d and Ta 5d hybrid orbitals, while the VB is mainly contributed by O 2p orbitals [43]. Attractively, the CB of CsTaWO 6 is located at approximately − 0.37 V vs. NHE [222], indicating that the photogenerated electrons in CsTaWO 6 have sufficient reductive potential for the hydrogen production. However, the bandgap of CsTaWO 6 is as large as 3.8 eV [43], which limits the light absorption in a very narrow UV range.…”

Section: Quaternary Oxidesmentioning

confidence: 99%

Recent progress of tungsten- and molybdenum-based semiconductor materials for solar-hydrogen production

Wang

2019

Tungsten

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Semiconductor-based solar water splitting is regarded as one of the most promising technologies for clean hydrogen production. The rational design of semiconductor materials is critically important to achieve high solar-to-hydrogen (STH) conversion efficiencies towards practical applications. A rich family of tungsten-and molybdenum-based materials have been developed as both photocatalysts and cocatalysts for solar-hydrogen production in the past years, providing more opportunities to achieve high solar-to-hydrogen (STH) efficiencies. In this review article, we comprehensively review the recent progress of tungsten-and molybdenum-based materials for solar-hydrogen production. In particular, the strengths and drawbacks of each material system are critically discussed, followed by an overview of the emerging strategies to improve their performances. Finally, the key challenges and possible research directions of tungsten-and molybdenum-based materials are presented, which would provide useful information for the design of efficient semiconductor materials for solar-hydrogen production.

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Fabrication of the heterostructured CsTaWO6/Au/g-C3N4 hybrid photocatalyst with enhanced performance of photocatalytic hydrogen production from water

Cited by 56 publications

References 54 publications

Enhancement of Hydrogen Evolution Reaction Performance of Graphitic Carbon Nitride with Incorporated Nickel Boride

Enhancement of Hydrogen Evolution Reaction Performance of Graphitic Carbon Nitride with Incorporated Nickel Boride

Graphene in Photocatalysis: A Review

Recent progress of tungsten- and molybdenum-based semiconductor materials for solar-hydrogen production

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