Journal ArticleDOI
2D CeO2 and a Partially Phosphated 2D Ni-Based Metal-Organic Framework Formed an S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Evolution.
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In this article , an S-scheme heterojunction was constructed on the basis of the modification of a Ni-based metal-organic framework (Ni-MOF) by different in situ treatment strategies.Abstract:
Here, an S-scheme heterojunction was constructed on the basis of the modification of a Ni-based metal-organic framework (Ni-MOF) by different in situ treatment strategies. First, NiS2, NiO, and Ni2P were derived in situ on the surface of Ni-MOF through surface sulfonation, oxidation, and phosphatizing treatments. They can efficiently accept the electrons from the conduction band of Ni-MOF as the trap centers, thus improving the hydrogen production activity. Additionally, phosphatizing makes the electronegativity of Ni-MOF/P stronger than that of the original Ni-MOF, which can enhance the absorption of protons, thus promoting the hydrogen evolution reaction. Next, the S-scheme heterojunction was successfully built by the coupling of 2D CeO2 with Ni-MOF/P. The maximum hydrogen production rate of the hybrid catalyst (6.337 mmol g-1 h-1) is 14.18 times that of the untreated Ni-MOF due to the full utilization of photo-induced electrons. Finally, the probable hydrogen evolution mechanism was proposed by analyzing a series of characterization results and by the density functional theory (DFT) calculation.read more
Citations
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Challenges of Z-scheme photocatalytic mechanisms
TL;DR: In this article , the authors analyze the challenges of photocatalytic mechanisms in liquid-phase and all-solid-state Z-scheme systems from various perspectives, including thermodynamics, charge transfer dynamics, applicability, and practical synthesis.
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C3N4/PDA S‐Scheme Heterojunction with Enhanced Photocatalytic H2O2 Production Performance and Its Mechanism
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Anchoring highly-dispersed ZnCdS nanoparticles on NiCo Prussian blue Analogue-derived cubic-like NiCoP forms an S-scheme heterojunction for improved hydrogen evolution.
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In-situ construction of BiOBr/Bi2WO6 S-scheme heterojunction nanoflowers for highly efficient CO2 photoreduction: regulation of morphology and surface oxygen vacancy
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Improving photocatalytic hydrogen production via ultrafine-grained precipitates formed nearby surface defects of NiFe-LDH nanosheets
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TL;DR: In this paper , an in-situ annealing transmission electron microscopy (TEM) investigation of the microstructural evolution of large-sized NiFe-LDH nanosheets identified typical microstructures at different stages.
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Self-Supported Nanoporous Cobalt Phosphide Nanowire Arrays: An Efficient 3D Hydrogen-Evolving Cathode over the Wide Range of pH 0–14
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Journal ArticleDOI
Hydrogen evolution by a metal-free electrocatalyst
Yao Zheng,Yan Jiao,Yihan Zhu,Lu Hua Li,Yu Han,Ying Chen,Aijun Du,Mietek Jaroniec,Shi-Zhang Qiao +8 more
TL;DR: This work couple graphitic-carbon nitride with nitrogen-doped graphene to produce a metal-free hybrid catalyst, which shows an unexpected hydrogen evolution reaction activity with comparable overpotential and Tafel slope to some of well-developed metallic catalysts.
Journal ArticleDOI
S-Scheme Heterojunction Photocatalyst
TL;DR: In this article, the authors soberly reflect the charge transfer mechanism from many perspectives and are finally aware of the fundamental challenges they face to ensure a correct understanding, it is necessary to share their analysis with others Moreover, step-scheme heterojunctions, consisting of a reduction photocatalyst and an oxidizer with staggered band structure, are introduced to avoid misinterpretation.