A p-Si/NiCoSex core/shell nanopillar array photocathode for enhanced photoelectrochemical hydrogen production

2016 ◽  
Vol 9 (10) ◽  
pp. 3113-3119 ◽  
Author(s):  
Hongxiu Zhang ◽  
Qi Ding ◽  
Denghong He ◽  
Hu Liu ◽  
Wei Liu ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Rational Design ◽  
Hydrogen Generation ◽  
Core Shell ◽  
Photoelectrochemical Hydrogen Production

We report the rational design and successful preparation of p-Si/NiCoSex core/shell nanopillar array photocathodes for enhanced solar-driven photoelectrochemical hydrogen generation.

scholarly journals Ag–Au Core–Shell Triangular Nanoprisms for Improving p-g-C3N4 Photocatalytic Hydrogen Production

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3347
Author(s):  
Yali Guo ◽  
Anzhou Xu ◽  
Juan Hou ◽  
Qingcui Liu ◽  
Hailong Li ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Self Assembly ◽  
Rational Design ◽  
Photogenerated Electron ◽  
Core Shell ◽  
Co Catalyst ◽  
Replacement Method ◽  
Assembly Method ◽  
Free Replacement ◽  
Electron Holes

Ag–Au core–shell triangular nanoprisms (Ag@Au TNPs) have aroused extensive research interest in the field of hydrogen evolution reaction (HER) due to their strong plasmon effect and stability. Here, Ag@Au TNPs were fabricated by the galvanic-free replacement method. Then, we loaded them on protonated g-C3N4 nanoprisms (P–CN) by the electrostatic self-assembly method as an efficient plasmonic photocatalyst for HER. The hydrogen production rate of Ag@Au TNPs/P–CN (4.52 mmol/g/h) is 4.1 times higher than that of P–CN (1.11 mmol/g/h) under simulated sunlight irradiation, making it the most competitive material for water splitting. The formed Schottky junction helps to trap the hot electrons generated from Ag@Au TNPs, and the well-preserved tips of the Ag@Au TNPs can effectively generate an electromagnetic field to inhibit the photogenerated electron–holes pairs recombination. This study suggests that the rational design of Ag@Au TNPs by the galvanic-free replacement method is an effective co-catalyst for HER and boosting the additional combination of plasmonic metals and catalyst metals for the enhancement to HER.

Fabrication of Au@CdS/RGO/TiO2 heterostructure for photoelectrochemical hydrogen production

2016 ◽  
Vol 40 (3) ◽  
pp. 2287-2295 ◽  
Author(s):  
Chunfa Li ◽  
Weiqiang Fan ◽  
Huachang Lu ◽  
Yilin Ge ◽  
Hongye Bai ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Energy Band ◽  
Hydrogen Generation ◽  
Photoelectrochemical Hydrogen Production

Schematic energy band illustration of a novel Au@CdS/RGO/TiO2 heterostructure as a photoelectrode for PEC hydrogen generation via water splitting.

Electrochemically controlled CdS@CdSe nanoparticles on ITO@TiO2 dual core–shell nanowires for enhanced photoelectrochemical hydrogen production

2020 ◽  
Vol 505 ◽  
pp. 144569
Author(s):  
Yoonjun Cho ◽  
Minjeong Park ◽  
Jung Kyu Kim ◽  
Sungsoon Kim ◽  
Hyun Suk Jung ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Cdse Nanoparticles ◽  
Core Shell ◽  
Photoelectrochemical Hydrogen Production ◽  
Dual Core ◽  
Shell Nanowires

Photocatalytic hydrogen generation from water under visible light using core/shell nano-catalysts

2010 ◽  
Vol 61 (9) ◽  
pp. 2303-2308 ◽  
Author(s):  
X. Wang ◽  
K. Shih ◽  
X. Y. Li
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Production Rate ◽  
Hydrogen Generation ◽  
Nano Particles ◽  
Catalyst Loading ◽  
Core Shell ◽  
Hydrogen Production Rate ◽  
Photocatalytic Hydrogen Generation ◽  
Nano Catalysts

A microemulsion technique was employed to synthesize nano-sized photocatalysts with a core (CdS)/shell (ZnS) structure. The primary particles of the photocatalysts were around 10 nm, and the mean size of the catalyst clusters in water was about 100 nm. The band gaps of the catalysts ranged from 2.25 to 2.46 eV. The experiments of photocatalytic H2 generation showed that the catalysts (CdS)x/(ZnS)1−x with x ranging from 0.1 to 1 were able to produce hydrogen from water photolysis under visible light. The catalyst with x = 0.9 had the highest rate of hydrogen production. The catalyst loading density also influenced the photo-hydrogen production rate, and the best catalyst concentration in water was 1 g L−1. The stability of the nano-catalysts in terms of size, morphology and activity was satisfactory during an extended test period for a specific hydrogen production rate of 2.38 mmol g−1 L−1 h−1 and a quantum yield of 16.1% under visible light (165 W Xe lamp, λ > 420 nm). The results demonstrate that the (CdS)/(ZnS) core/shell nano-particles are a novel photo-catalyst for renewable hydrogen generation from water under visible light. This is attributable to the large band-gap ZnS shell that separates the electron/hole pairs generated by the CdS core and hence reduces their recombinations.

Nanofiber-supported CuS nanoplatelets as high efficiency counter electrodes for quantum dot-based photoelectrochemical hydrogen production

2017 ◽  
Vol 1 (1) ◽  
pp. 65-72 ◽  
Author(s):  
F. Navarro-Pardo ◽  
L. Jin ◽  
R. Adhikari ◽  
X. Tong ◽  
D. Benetti ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Quantum Dot ◽  
Copper Sulfide ◽  
Counter Electrode ◽  
High Efficiency ◽  
Hydrogen Generation ◽  
Polymer Nanofibers ◽  
Counter Electrodes ◽  
Photoelectrochemical Hydrogen Production

A hybrid counter electrode based on copper sulfide/polymer nanofibers was developed for efficient and stable photoelectrochemical hydrogen generation.

Core−Shell Nanorods for Efficient Photoelectrochemical Hydrogen Production

2005 ◽  
Vol 109 (48) ◽  
pp. 22913-22919 ◽  
Author(s):  
Z. G. Yu ◽  
C. E. Pryor ◽  
W. H. Lau ◽  
M. A. Berding ◽  
D. B. MacQueen
Keyword(s):  
Hydrogen Production ◽  
Core Shell ◽  
Photoelectrochemical Hydrogen Production

scholarly journals Effect of Thermal Treatment of Aluminum Core-Shell Particles on Their Oxidation Kinetics in Water for Hydrogen Production

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6493
Author(s):  
Olesya A. Buryakovskaya ◽  
Mikhail S. Vlaskin ◽  
Anatoly V. Grigorenko
Keyword(s):  
Thermal Treatment ◽  
Hydrogen Production ◽  
Oxidation Kinetics ◽  
Hydrogen Generation ◽  
Core Shell ◽  
Distilled Water ◽  
Hydrogen Yield ◽  
Protective Oxide ◽  
Shell Particles ◽  
Thermally Treated

The effect of thermal treatment of aluminum core-shell particles on their oxidation kinetics in water for hydrogen production was investigated. The samples were obtained by dividing dried aluminum powder, partially oxidized by distilled water, into eight portions, which were thermally treated at temperatures of 120, 200, 300, 400, 450, 500, 550 and 600 °C. Alumina shell cracking at 500–600 °C enhances hydrogen generation due to uncovering of the aluminum cores, while sharp thickening of the protective oxide film on the uncovered aluminum surfaces at 550–600 °C significantly reduces reactivity of the core-shell particles. For these reasons, after reaction with distilled water at 90 °C for two hours, the highest hydrogen yield (11.59 ± 1.20)% was obtained for the sample thermally treated at 500 °C , while the yield for aluminum core-shell powder without heat treatment was only (5.46 ± 0.13)%. Another set of experiments employed multiple consecutive cycles of alternating oxidation by water and thermal treatment at 500 °C of the same powder sample. As predicted, the hydrogen yield gradually decreased with each subsequent experiment. The series of six cycles resulted in a total hydrogen yield of 53.46%.

Gold nanoparticle decorated bismuth sulfide nanorods for enhanced photoelectrochemical hydrogen production

2019 ◽  
Vol 7 (21) ◽  
pp. 6398-6405 ◽  
Author(s):  
Palyam Subramanyam ◽  
T. Vinodkumar ◽  
Melepurath Deepa ◽  
Ch. Subrahmanyam
Keyword(s):  
Hydrogen Production ◽  
Charge Carrier ◽  
Gold Nanoparticle ◽  
Light Absorption ◽  
Hydrogen Generation ◽  
Bismuth Sulfide ◽  
Fast Charge ◽  
Carrier Separation ◽  
Photoelectrochemical Hydrogen Production

The design of photo-electrodes with good light absorption, effective photo-generated charge carrier separation and fast charge transportation are key parameters for photoelectrochemical (PEC) hydrogen generation.

Core-Shell Nanorods for Efficient Photoelectrochemical Hydrogen Production

2005 ◽  
Vol 885 ◽  
Author(s):  
Z. G. Yu ◽  
C. E. Pryor ◽  
W. H. Lau ◽  
M. A. Berding ◽  
D. B. MacQueen
Keyword(s):  
Wave Function ◽  
Hydrogen Production ◽  
Systematic Study ◽  
Quantum Confinement ◽  
Shell Thickness ◽  
Considerable Extent ◽  
Core Shell ◽  
Core Radius ◽  
Photoelectrochemical Hydrogen Production ◽  
Strain Dependent

ABSTRACTWe propose core-shell InP-CdS and InP-ZnTe nanorods as photoelectrodes in the efficient photoelectrochemical hydrogen production. Based on our systematic study using strain-dependent k.p theory, we find that in these heterostructures both energies and wave-function distributions of electrons and holes can be favorably tailored to a considerable extent by exploiting the interplay between quantum confinement and strain. Consequently, these core-shell nanorods with proper dimensions (height, core radius, and shell thickness) can simultaneously satisfy all criteria for effective photoelectrodes in solar-based hydrogen production.

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