Charge Behavior in Photocatalytic Hydrogen Production by Photo Electrochemical Test Based on Nanomaterial of CoS2 Modified g-C3N4

Seeking and developing a new approach to energy conversion is of significance to the development of future society. Hydrogen energy is expected to become an ideal green energy. In this work, g-C3N4 nanocomposites were modified with non-noble metal-sulfide CoS2 as a co-catalyst for hydrogen evolution, and the charge behavior in a photocatalytic process was studied by optical characterization and photo electrochemical test technology. The experiments proved that the composite material showed a superior hydrogen production performance when the CoS2 load was 5[Formula: see text]wt.% and the optimal hydrogen production activity was 119.7[Formula: see text][Formula: see text]mol[Formula: see text]g[Formula: see text]. CoS2 as the reactivity site improved the migration and separation of the photo-generated charge significantly, the transfer resistance of the photogenerated charge decreased visibly after the CoS2 loading, the photocurrent increased three times and the effective carrier lifetime on the catalyst conduction band increased ten times. The photocatalysts maintained a good stability in a 12[Formula: see text]h hydrogen production activity test and a one hour photocurrent test. This work provides guidance for the design of an efficient catalyst and the study of effective charge.

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Synthesis of layer-like Ni(OH)2 decorated ZnIn2S4 sub-microspheres with enhanced visible-light photocatalytic hydrogen production activity

Dalton Transactions ◽

10.1039/c7dt00819h ◽

2017 ◽

Vol 46 (32) ◽

pp. 10620-10629 ◽

Cited By ~ 43

Author(s):

Songsong Li ◽

Dongsheng Dai ◽

Lei Ge ◽

Yangqin Gao ◽

Changcun Han ◽

...

Keyword(s):

Hydrogen Production ◽

Visible Light ◽

Production Performance ◽

Deposition Method ◽

Co Catalyst ◽

Photocatalytic Hydrogen Production ◽

Production Activity ◽

First Time ◽

Visible Light Photocatalytic

Novel layer-like Ni(OH)2 co-catalyst-decorated ZnIn2S4 microsphere photocatalysts were synthesized for the first time via a facile in situ deposition method to boost the photocatalytic H2-production performance.

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Boosting photocatalytic hydrogen production activity by microporous CuII-MOF nanoribbon decorated with Pt nanoparticles

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00516b ◽

2021 ◽

Author(s):

Lei Li ◽

Yan Zhao ◽

Qian Wang ◽

Zheng-Yu Liu ◽

Xiu-Guang Wang ◽

...

Keyword(s):

Hydrogen Production ◽

Hydrogen Evolution ◽

Water Splitting ◽

Energy Production ◽

Metal Organic Framework ◽

Pt Nanoparticles ◽

Hydrogen Energy ◽

Photocatalytic Efficiency ◽

Production Activity ◽

Metal Organic

Improving the photocatalytic efficiency for hydrogen evolution from water splitting plays vital roles for the feasible applications of clean and sustainable hydrogen energy production. A crystalline microporous CuII-based metal-organic framework...

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Facile One-Step Preparation and Efficient Photocatalytic Hydrogen Production of Composite MoS2/g-C3N4 Sensitized by Erythrosin B

NANO ◽

10.1142/s1793292020501271 ◽

2020 ◽

Vol 15 (10) ◽

pp. 2050127

Author(s):

Mingcai Yin ◽

Yixian Li ◽

Kaiyue Liang ◽

Jiangfan Sun ◽

Yaoting Fan ◽

...

Keyword(s):

Hydrogen Production ◽

Photophysical Properties ◽

Production Performance ◽

One Pot ◽

Photocatalytic Hydrogen Production ◽

Erythrosin B ◽

Production Activity ◽

One Step ◽

Calcination Method ◽

First Time

MoS2/g-C3N4 (g-C3N4 [Formula: see text] graphitic carbon nitride) composite is considered as a promising photocatalyst for hydrogen production, while the preparation method still needs to be improved. Herein for the first time, nanosized MoS3 and melamine were used as starting materials and a facile one-pot calcination method was successfully applied for the synthesis of MoS2/g-C3N4. The physical and photophysical properties of the as-prepared MoS2/g-C3N4 were characterized by XRD, IR, SEM, TEM and XPS techniques. Sensitized by Erythrosin B (EB), the photocatalytic hydrogen production performance of MoS2/g-C3N4 was investigated and the amount of MoS2 was optimized. An excellent H2 production activity of 1091.2[Formula: see text][Formula: see text] was achieved for 43% MoS2/g-C3N4, which is about 330 times that of pure g-C3N4 (3.3[Formula: see text][Formula: see text]. In addition, its performance was compared with those of three other MoS2/g-C3N4 samples prepared by conventional methods and a possible mechanism of H2 production was proposed based on the photoluminescence and photoelectrochemical results.

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Hydrolysis-Based Hydrogen Generation Investigation of Aluminum System Adding Low-Melting Metals

Energies ◽

10.3390/en14051433 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1433

Author(s):

Zeng Gao ◽

Fei Ji ◽

Dongfeng Cheng ◽

Congxin Yin ◽

Jitai Niu ◽

...

Keyword(s):

Aluminum Alloy ◽

Hydrogen Production ◽

Hydrogen Generation ◽

Production Capacity ◽

Graphite Crucible ◽

Production Performance ◽

Second Phase ◽

Hydrogen Energy ◽

Reaction Products ◽

Scanning Calorimetry

In this age of human civilization, there is a need for more efficient, cleaner, and renewable energy as opposed to that provided by nonrenewable sources such as coal and oil. In this sense, hydrogen energy has been proven to be a better choice. In this paper, a portable graphite crucible metal smelting furnace was used to prepare ten multi-element aluminum alloy ingots with different components. The microstructure and phase composition of the ingots and reaction products were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). The reaction was carried out in a constant temperature water bath furnace at 60 °C, and the hydrogen production performance of the multi-element aluminum alloys in different proportions was compared by the drainage gas collection method. The experimental results show that the as-cast microstructure of Al–Ga–In–Sn aluminum alloy is composed of a solid solution of Al and part of Ga, and a second phase of In3Sn. After the hydrolysis reaction, the products were dried at 150 °C and then analyzed by XRD. The products were mainly composed of AlOOH and In3Sn. Alloys with different compositions react at the same hydrolysis temperature, and the hydrogen production performance is related to the ratio of low-melting-point metal elements. By comparing two different ratios of Ga–In–Sn (GIS), the hydrogen production capacity and production rate when the ratio is 6:3:1 are generally higher than those when the ratio is 7:2:1. The second phase content affects the hydrogen production performance.

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Preparation and Photocatalytic Water Splitting Hydrogen Production of Titanium Dioxide Nanosheets

International Journal of Photoenergy ◽

10.1155/2020/3617312 ◽

2020 ◽

Vol 2020 ◽

pp. 1-6

Author(s):

Fuying Li ◽

Yin Huang ◽

Hongling Peng ◽

Yu Cao ◽

Yu Niu

Keyword(s):

Hydrogen Production ◽

Water Splitting ◽

Active Surface ◽

Production Performance ◽

Photocatalytic Water Splitting ◽

Calcination Temperatures ◽

Advantages And Disadvantages ◽

Production Activity ◽

Special Morphology ◽

Uv Visible

Improving the efficiency of photocatalytic water splitting to produce hydrogen is currently a hot topic in research. TiO2 nanosheets are a good carrier of photocatalytic materials and have become attractive materials in the new century because of their high active surface exposure characteristics and special morphology. Considering the advantages and disadvantages of conventional chemical and physical methods that are used for preparing TiO2 nanosheets, an optimized scheme for the preparation of TiO2 nanosheets via hydrothermal calcination was proposed. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and UV-visible diffuse reflection absorption spectra (DRS) were used to characterize the structure and morphology of the TiO2 nanosheets, and differences in the photocatalytic water splitting hydrogen production activity of the different calcination temperatures were compared. The suitable calcination temperature of the TiO2 nanosheets was 400°C, and the hydrogen production rate was 270 μmol/h, which indicated that the sheet structure was beneficial for improving the photocatalytic water splitting hydrogen production performance of the material. It is hoped that this work will support the regulation of the surface morphology and surface modification of nanomaterials.

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Analysis of hydrogen production capacity of off-grid photovoltaic system based on PVsyst software simulation

Journal of Physics Conference Series ◽

10.1088/1742-6596/2076/1/012005 ◽

2021 ◽

Vol 2076 (1) ◽

pp. 012005

Author(s):

Jiantao Li ◽

Yongguang Li ◽

Boxu Zhu ◽

Xinxia Ma

Keyword(s):

Hydrogen Production ◽

Production Capacity ◽

Production Equipment ◽

Green Energy ◽

Energy Resources ◽

Photovoltaic System ◽

Performance Ratio ◽

Pollutant Emission ◽

Hydrogen Energy ◽

Production Methods

Abstract As a typical green energy, hydrogen energy has many advantages. The traditional hydrogen production methods are more polluting. However, the use of electricity generated by photovoltaic systems to produce hydrogen can not only make full use of local solar energy resources, but also achieve environmentally friendly hydrogen production. In this work, we use PVsyst software to model and simulate a 30kW off grid photovoltaic power plant in a region of Shanghai, and calculate its power generation. Combined with the energy consumption of hydrogen production equipment, we evaluated the hydrogen production capacity and pollutant emission reductions, and we also analyzed the performance ratio and power loss of photovoltaic system, which verifies the environmental protection of photovoltaic hydrogen production, and provides a reference for photovoltaic hydrogen production researchers.

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