The serious energy crisis is an urgent global problem that mankind must turn to in the present and future. Hydrogen energy has been attracting increasing attention as a promising clean energy [1,2,3].Through …
In 1938, the hypothesis of using hydrogen as aviation fuel was put forward, and it was first verified in practice in 1960. Subsequently, the first hydrogen fuel cell vehicle was released in 1972. Since the 1970s, in the face of environmental pollution and other crises, hydrogen energy research has been conducted extensively all around the world.
Request PDF | Highly efficient photocatalytic conversion of solar energy to hydrogen by WO3/BiVO4 core–shell heterojunction nanorods | Photocatalytic splitting of water under solar light has ...
Overall water splitting using photocatalysts has attracted considerable interest due to its potential for CO 2-free production of hydrogen from water by utilizing abundant solar light energy [1,2,3,4,5,6,7].To improve the productivity of hydrogen of the overall water splitting, expanding active wavelengths of the photocatalyst from UV light to visible or near-IR (NIR) …
This material is based upon work supported by the U.S. Department of Energy''s Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office Award Numbers DE ...
Silicon heterojunction (SHJ) solar cells have reached high power conversion efficiency owing to their effective passivating contact structures. Improvements in the …
In this study, the authors attempted to introduce the idea of H 2 S removal and its utilization as a new energy/chemical source to produce hydrogen fuel and sulfur element. The …
Transition metal sulfides are commonly studied as photocatalysts for water splitting in solar-to-fuel conversion. However, the effectiveness of these photocatalysts is limited by the recombination and restricted light absorption capacity of carriers. In this paper, a broad spectrum responsive In2S3/Bi2S3 heterojunction is constructed by in-situ integrating Bi2S3 with the In2S3, derived …
Because of having a narrow bandgap (∼1.3 eV), high absorption coefficient (10 4 –10 5 cm −1), and suitable conduction band energy level, Bi 2 S 3 is an interesting non-toxic n-type solar-energy material with the photocatalytic power to produce hydrogen fuel [13], [14], [15].
The origin of electron donor–acceptor complexes, hydrogen bonding and proton affinity. ... acceptor copolymer and fullerene for high efficient bulk heterojunction solar cells. Energy Environ. ...
The formation of a well-defined heterojunction between two semiconductors with matching electronic band structures can also suppress the recombination of photogenerated electrons and holes [24, 25, 26, 38] g. 1 illustrates how p-n heterojunctions enhance the separation efficiency of electron-hole pairs. The p-n heterojunction is a junction between two …
Silicon heterojunction (SHJ) solar cells have garnered much interest because of their high energy conversion efficiencies and simple fabrication [1], [2].A SHJ solar cell consists of a monocrystalline silicon wafer sandwiched between nanometer-thick doped amorphous silicon (a-Si:H) layers that are usually deposited by plasma-enhanced chemical vapor depositon …
The interface of high-quality crystalline silicon/hydrogenated amorphous silicon (c-Si/a-Si:H) is indispensable for achieving the ideal conversion efficiency of Si heterojunction solar cells.
Today, as a result of the advancement of technology and increasing environmental problems, the need for clean energy has considerably increased. In this regard, hydrogen, which is a clean and sustainable energy carrier with high energy density, is among the well-regarded and effective means to deliver and store energy, and can also be used for …
An excellent heterojunction nanocomposite solar-energy material for photocatalytic transformation of hydrogen sulfide pollutant to hydrogen fuel and elemental sulfur: A mechanistic insight ... Furthermore, in this approach, the valuable hydrogen fuel stored in H 2 S is set aside and squandered [oxidized] during the burning process. Therefore, ...
Solar water splitting using photoelectrochemical cells (PEC''s) is a promising pathway toward clean and sustainable storage of renewable energy. Practical realization of solar-driven synthesis of hydrogen and oxygen integrating light absorption and electrolysis of water has been challenging because of (1) the limited stability of good ...
Organic semiconductor heterojunction photocatalysts are promising for synthesis of solar fuels yet a deeper understanding of their underlying photophysics is needed …
In this paper, PbS-ZnS/electrospun fiber composites were prepared by supporting PbS-ZnS heterojunction on the polyvinylidene fluoride (PVDF)/styrene-maleic anhydride (SMA) …
The photocatalytic synthesis of solar fuels such as hydrogen and methane from water and carbon dioxide is a promising strategy to store abundant solar energy in order to overcome its intermittency.
Silicon heterojunction solar cell composed of amorphous silicon and microcrystalline silicon films deposited on crystalline silicon absorption layers are among the most promising ... The collision between SiH 4 and H + reduces the energy of hydrogen plasma, and this process can weaken the high-energy bombardment of hydrogen plasma, thus ...
In addition, the heterojunctions facilitate the hydrogen evolution reaction (HER) as evidenced by overpotentials of 276 mV at a current density of 10 mA/cm 2 and Tafel slopes of 84.6 mV/dec in an alkaline medium. The heterojunction density reaches 12.1 junctions per 1000 μm 2 in the photoanode film. The high density of the heterojunction ...
Hydrogen fuels generated by water splitting using a photocatalyst and solar irradiation are currently gaining the strength to diversify the world energy matrix in a green way.
Solar-heating catalysis has the potential to realize zero artificial energy consumption, which is restricted by the low ambient solar heating temperatures of photothermal materials. Here, we ...
Silicon heterojunction (SHJ) solar cell, which adopts intrinsic and doped hydrogenated amorphous silicon (a-Si:H) stacks for both efficient surface passivation and carrier selective transport, has attracted lots of research attention in the last few decades due to its merits including high efficiency, low-temperature coefficient and simple processing [[1], [2], [3]].
If molecular hydrogen could be recovered from H 2 S instead of simply burning it to H 2 O (Claus process), approximately 7.7 × 10 9 m 3 y −1 of H 2 could be produced.. 2.3 CdS Semiconductors. A variety of semiconductors are available, but most are unsuitable for hydrogen evolution under visible light because of the wide E g s (>3 eV) and the unsuitable CB levels …
The heterojunction density reaches 12.1 junctions per 1000 μm 2 in the photoanode film. The high density of the heterojunction enables the photoelectric and electrocatalytic performances. The promising results provide avenues for …
Haifei Chen, Jie Yang, Haiqun Chen, Lijun Lu, Solar photocatalytic hydrogen energy production using PbS-ZnS heterojunction/electrospun fiber composites, Energy ...
Introduction. The serious energy crisis is an urgent global problem that mankind must turn to in the present and future. Hydrogen energy has been attracting increasing attention as a promising clean energy [1–3].Through photoelectrochemical (PEC) water splitting, solar energy can be directly converted into hydrogen energy [4, 5].However, in real applications, this …
1. Introduction. The excellent surface passivation of crystalline silicon (c-Si) by a thin hydrogenated amorphous silicon (a-Si:H) layer [1, 2] enables world record efficiencies of SHJ solar cells [3].A key to this outstanding surface passivation is the prevention of epitaxial growth at the a-Si:H/c-Si interface [4, 5] was found that for single intrinsic layers, surface passivation ...
Two primary methods for directly converting solar energy into hydrogen are solar-driven photocatalysis and thermocatalysis [5].Photocatalytic hydrogen production has been an old and recognized idea since the pioneering work of Fujishima and Honda in 1972 [6] spite decades of active research, photocatalytic hydrogen production has yet to achieve widespread …
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