Enhancing Photocatalytic Hydrogen Production of g-C3N4 by Selective Deposition of Pt Cocatalyst

Graphitic carbon nitride (g-C3N4) has been widely studied as a photocatalyst for the splitting of water to produce hydrogen. In order to solve the problems of limited number of active sites and serious recombination rate of charge-carriers, noble metals are needed as cocatalysts. Here, we selectively anchored Pt nanoparticles (NPs) to specific nitrogen species on the surface of g-C3N4 via heat treatment in argon–hydrogen gas mixture, thus achieving g-C3N4 photocatalyst anchored by highly dispersed homogeneous Pt NPs with the co-existed metallic Pt0 and Pt2+ species. The synergistic effect of highly dispersed metallic Pt0 and Pt2+ species makes the catalyst exhibit excellent photocatalytic performance. Under the full-spectrum solar light irradiation, the photocatalytic hydrogen production rate of the photocatalyst is up to 18.67 mmol·g−1·h−1, which is 5.1 times of the catalyst prepared by non-selective deposition of Pt NPs.

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Site-Selective Deposition of Reductive and Oxidative Dual Cocatalysts To Improve the Photocatalytic Hydrogen Production Activity of CaIn2S4 with a Surface Nanostep Structure

ACS Applied Materials & Interfaces ◽

10.1021/acsami.8b17663 ◽

2018 ◽

Vol 11 (1) ◽

pp. 835-845 ◽

Cited By ~ 4

Author(s):

Jianjun Ding ◽

Xiangyang Li ◽

Lin Chen ◽

Xian Zhang ◽

Hao Yin ◽

...

Keyword(s):

Hydrogen Production ◽

Selective Deposition ◽

Photocatalytic Hydrogen Production ◽

Production Activity ◽

Site Selective

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Thio linkage between CdS quantum dots and UiO-66-type MOFs as an effective transfer bridge of charge carriers boosting visible-light-driven photocatalytic hydrogen production

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2020.07.121 ◽

2021 ◽

Vol 581 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Siman Mao ◽

Yajun Zou ◽

Guotai Sun ◽

Lingzhen Zeng ◽

Zhiye Wang ◽

...

Keyword(s):

Quantum Dots ◽

Hydrogen Production ◽

Visible Light ◽

Charge Carriers ◽

Cds Quantum Dots ◽

Photocatalytic Hydrogen Production ◽

Visible Light Driven ◽

Effective Transfer

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Conductive Ti3C2 and MOF-derived CoSx boosting the photocatalytic hydrogen production activity of TiO2

CrystEngComm ◽

10.1039/c8ce02050g ◽

2019 ◽

Vol 21 (14) ◽

pp. 2416-2421 ◽

Cited By ~ 22

Author(s):

Jia-Hui Zhao ◽

Ling-Wang Liu ◽

Kui Li ◽

Tao Li ◽

Fu-Tian Liu

Keyword(s):

Hydrogen Production ◽

Charge Carriers ◽

Photocatalytic Hydrogen Production ◽

Transport Efficiency ◽

Production Activity

We report a novel TiO2 nanocrystals photocatalyst confined by ZIF-67-templated porous CoSx, with conductive Ti3C2 boosting the transport efficiency of the charge carriers.

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Engineering ultrafine NiS cocatalysts as active sites to boost photocatalytic hydrogen production of MgAl layered double hydroxide

Applied Surface Science ◽

10.1016/j.apsusc.2019.144999 ◽

2020 ◽

Vol 506 ◽

pp. 144999 ◽

Cited By ~ 5

Author(s):

Jingshuai Chen ◽

Chao Wang ◽

Yun Zhang ◽

Zhenzhen Guo ◽

Yuxin Luo ◽

...

Keyword(s):

Hydrogen Production ◽

Layered Double Hydroxide ◽

Active Sites ◽

Photocatalytic Hydrogen Production ◽

Double Hydroxide

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Photocatalytic Hydrogen Production from Glycerol Aqueous Solution Using Cu-Doped ZnO under Visible Light Irradiation

Applied Sciences ◽

10.3390/app9132741 ◽

2019 ◽

Vol 9 (13) ◽

pp. 2741 ◽

Cited By ~ 1

Author(s):

Vincenzo Vaiano ◽

Giuseppina Iervolino

Keyword(s):

Hydrogen Production ◽

Visible Light ◽

Visible Light Irradiation ◽

Noble Metals ◽

Light Irradiation ◽

Precipitation Method ◽

Glycerol Solution ◽

Glycerol Concentration ◽

Photocatalytic Hydrogen Production ◽

Doped Zno

Cu-doped ZnO photocatalysts at different Cu loadings were prepared by a precipitation method. The presence of Cu in the ZnO crystal lattice led to significant enhancement in photocatalytic activity for H2 production from an aqueous glycerol solution under visible light irradiation. The best Cu loading was found to be 1.08 mol %, which allowed achieving hydrogen production equal to 2600 μmol/L with an aqueous glycerol solution at 5 wt % initial concentration, the photocatalyst dosage equal to 1.5 g/L, and at the spontaneous pH of the solution (pH = 6). The hydrogen production rate was increased to about 4770 μmol/L by increasing the initial glycerol concentration up to 10 wt %. The obtained results evidenced that the optimized Cu-doped ZnO could be considered a suitable visible-light-active photocatalyst to be used in photocatalytic hydrogen production without the presence of noble metals in sample formulation.

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In situ Synthesis of Nickel-Dimethylglyoxime/Black Phosphorus Nanorods for Photocatalytic Hydrogen Production from Water Splitting

NANO ◽

10.1142/s1793292020501258 ◽

2020 ◽

Vol 15 (10) ◽

pp. 2050125

Author(s):

Hui’e Wang

Keyword(s):

Hydrogen Production ◽

Water Splitting ◽

Active Sites ◽

Hydrogen Generation ◽

Hollow Structure ◽

Black Phosphorus ◽

In Situ Growth ◽

Photocatalytic Hydrogen Production ◽

Reaction Cycles

Here, a novel material consisting of black phosphorus (BP) and nickel-dimethylglyoxime nanorods was successfully prepared via a facile in situ calcination strategy, which possesses efficient catalytic activity for hydrogen production from water splitting. The reason for this phenomenon was explained by a series of characterization technologies such as SEM, TEM, XRD, UV–Vis, XPS and photoelectrochemical. We demonstrated that the fast e− transport channels were provided by the formed hollow structure of C@Ni-D nanorods, the highly exposed active sites on C@Ni-BP nanorods benefiting from the direct in situ growth of BP, the resulted synergetic effects of C@Ni-D-2 nanorods and BP achieved a better performance of photocatalytic hydrogen production from water splitting. The optimal hydrogen generation of C@Ni-BP-2 nanorods could reach up to 600[Formula: see text][Formula: see text]mol within 180[Formula: see text]min and the rate of hydrogen production did not decrease significantly after four repeated reaction cycles. This work may offer new direction in situ growth of novel catalysts for achieving highly efficient hydrogen production.

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Enhanced Photocatalytic Hydrogen Production of the Polyoxoniobate Modified with RGO and PPy

Nanomaterials ◽

10.3390/nano10122449 ◽

2020 ◽

Vol 10 (12) ◽

pp. 2449

Author(s):

Shiliang Heng ◽

Lei Li ◽

Weiwei Li ◽

Haiyan Li ◽

Jingyu Pang ◽

...

Keyword(s):

Hydrogen Production ◽

Active Sites ◽

High Efficiency ◽

Solvothermal Method ◽

H2 Production ◽

H2 Evolution ◽

Co Catalyst ◽

Photocatalytic Hydrogen Production ◽

Reduced Graphene ◽

One Step

The development of high-efficiency, recyclable, and inexpensive photocatalysts for water splitting for hydrogen production is of great significance to the application of solar energy. Herein, a series of graphene-decorated polyoxoniobate photocatalysts Nb6/PPy-RGO (Nb6 = K7HNb6O19, RGO = reduced graphene oxide, PPy = polypyrrole), with the bridging effect of polypyrrole were prepared through a simple one-step solvothermal method, which is the first example of polyoxoniobate-graphene-based nanocomposites. The as-fabricated photocatalyst showed a photocatalytic H2 evolution activity without any co-catalyst. The rate of 1038 µmol g−1 in 5 h under optimal condition is almost 43 times higher than that of pure K7HNb6O19·13H2O. The influencing factors for photocatalysts in photocatalytic hydrogen production under simulated sunlight were studied in detail and the feasible mechanism is presented in this paper. These results demonstrate that Nb6O19 acts as the main catalyst and electron donor, RGO provides active sites, and PPy acted as an electronic bridge to extend the lifetime of photo-generated carriers, which are crucial factors for photocatalytic H2 production.

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