Preparation of Ni 2 P/Al 2 O 3 by temperature-programmed reduction of a phosphate precursor with a low P/Ni ratio

Li, Xiang; Feng, Junli; Guo, Jingyu; Wang, Anjie; Prins, R.; Duan, Xinping; Chen, Yongying

doi:10.1016/j.jcat.2015.11.007

Cited by 32 publications

(9 citation statements)

References 25 publications

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“…26 First, 1 g of NixAly-LDHs was reduced to obtain Ni-Al 2 O 3 (H) with different Ni loadings in a H 2 /N 2 (50/50, v/v) stream at a heating rate of 2 °C/min, at 450 °C for 5 h, and then slowly cooled to room temperature with nitrogen as the protective gas. Second, red P with nickel− phosphorus molar ratios of 2/1 and 3/1 is thoroughly mixed with Ni−Al 2 O 3 and then sealed in a quartz tube, 27 subsequently reduced in H 2 /N 2 (50/50, v/v) to give Ni 2 P-Al 2 O 3 (H) and Ni 12 P 5 -Al 2 O 3 (H) samples with a programmed heating rate of 2 °C/min, at 500 °C for 5 h.…”

Section: Methodsmentioning

confidence: 99%

Highly Selective Hydrodeoxygenation of Lignin to Naphthenes over Three-Dimensional Flower-like Ni₂P Derived from Hydrotalcite

Jia

Diao

et al. 2022

ACS Catal.

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A strategy for low-temperature synthesis of hydrotalcite-based nickel phosphide catalysts (Ni2P-Al2O3) with flower-like porous structures was proposed. The in situ reduction of red phosphorus at 500 °C enables Ni2P catalysts with small particle size and abundant active and acidic sites, which facilitate the activation of substrates and H2. In the hydrodeoxygenation of guaiacol, a 100% conversion and 94.5% yield of cyclohexane were obtained over the Ni2P-Al2O3 catalyst under 5 MPa H2 at 250 °C for 3 h. Other lignin-derived phenolic compounds could also afford the corresponding alkanes with yields higher than 85%. Moreover, Ni2P-Al2O3 exhibited high hydrodeoxygenation activity in the deconstruction of more complex wood structures, including lignin oil and real lignin. Among the two different types of Ni sites of Ni(1) and Ni(2) in Ni2P, density functional theory (DFT) calculations showed that the Ni(2) site, highly exposed on the Ni2P-Al2O3 surface, possesses a stronger ability to break C–OH bonds during the hydrodeoxygenation of guaiacol in comparison with the Ni(1) site.

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Section: Methodsmentioning

confidence: 99%

Highly Selective Hydrodeoxygenation of Lignin to Naphthenes over Three-Dimensional Flower-like Ni₂P Derived from Hydrotalcite

Jia

Diao

et al. 2022

ACS Catal.

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“…Transition-metal phosphides (TMPs) are broadly used as catalysts as a consequence of their noble metal free properties and high catalytic activities in hydrodesulfurization (HDS), hydrodenitrogenation (HDN), hydroprocessing (HPC), photocatalytic degradation, lithium ion batteries, and HER. − Recent research has demonstrated experimentally the excellent electrocatalytic activity and superior durability toward the HER of various TMPs, such as MoP, − WP, FeP, , CoP, − Co 2 P, Cu 3 P, Ni 2 P, , and Ni 12 P 5 . , Among these, the HER behavior of Ni 2 P is of particular interest. Density functional theory (DFT) calculations indicate that Ni 2 P (001) shows excellent activity over the conventional platinum catalyst, suggesting the synthesis of nickel phosphide with a single phase of Ni 2 P is of great significance in both of theory and practice.…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis Strategy for Hierarchically Porous Ni₂P Polyhedrons from MOFs Templates with Enhanced Electrochemical Properties for Hydrogen Evolution

Yan

Dai

Wang

et al. 2017

ACS Appl. Mater. Interfaces

165

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The development of highly active and stable noble metal-free electrocatalysts of hydrogen evolution reaction (HER) under both acidic and basic conditions for renewable-energy conversion techniques is of great significance. Herein, a practical in situ synthesis strategy for a three-dimensional NiP polyhedron with a hierarchically porous structure was presented, which was efficiently obtained from a nickel centered metal-organic frameworks (MOF-74-Ni) by direct low-temperature phosphorization. The as-prepared NiP polyhedron showed a high BET surface area (175.0 m·g), hierarchically porous property, and outstanding metal dispersion, which well inherited the morphology and porosity of its MOF precursor. Compared with NiP particles obtained from a nonporous precursor, the as-prepared NiP polyhedron used as electrocatalyst exhibited excellent electrocatalytic performance toward the HER, with a low overpotential of 158 mV to produce the cathodic current density of 10 mA cm. A small Tafel slope of 73 mV per decade is obtained for NiP polyhedron, which revealed a Volmer-Heyrovsky mechanism during the HER. In addition, benefiting from the structural stability, the porous NiP polyhedron used as a electrocatalyst showed satisfactory long-term durability for the HER in acidic media.

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“…For example, the binding energy of Ni δ+ was 852.8 eV in Ni 3 P/meso-SiO 2 , 852.6 eV in pure Ni 3 P, and 852.5 eV in Ni 3 P/γ-Al 2 O 3 . This electron-deficient species was ascribed to the electron transfer from Ni to P, which was also observed in several metal phosphides. , The P 2p signals of Ni-0.38P/Al 2 O 3 are shown in Figure S4. The peaks at 134.21 and 129.68 eV were attributed to P 5+ and P δ− , respectively .…”

Section: Results and Discussionmentioning

confidence: 84%

High-Performance Ni₃P Catalyst for C═O Hydrogenation of Ethyl Levulinate: Ni^δ+ as Outstanding Adsorption Sites

Liu

Wang

et al. 2022

ACS Catal.

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It is important but challenging to develop non-noble metal catalysts with high activity and selectivity for biomass conversion. The activation of CO bond is a crucial step in biomass upgradation. Herein, a series of Ni-xP/Al2O3 catalysts with different P/Ni molar ratios were prepared for the conversion of ethyl levulinate to γ-valerolactone. The developed Ni-0.38P/Al2O3 catalyst was 5.4 times more active than conventional Ni/Al2O3 based on turnover frequency and significantly outperformed the state-of-the-art non-noble metal catalysts. The unique catalytic performance was ascribed to the formation of Ni3P phase, which was identified by several characterizations. The results of DFT calculation and characterization by XPS and CO-FTIR revealed that electron was transferred from Ni to P with the formation of Niδ+ sites. In situ FTIR for the surface reaction indicated that Niδ+ acted as a new active site to activate the CO bond, which rendered the high intrinsic activity of Ni3P for the CO hydrogenation of EL.

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Preparation of Ni 2 P/Al 2 O 3 by temperature-programmed reduction of a phosphate precursor with a low P/Ni ratio

Cited by 32 publications

References 25 publications

Highly Selective Hydrodeoxygenation of Lignin to Naphthenes over Three-Dimensional Flower-like Ni₂P Derived from Hydrotalcite

Highly Selective Hydrodeoxygenation of Lignin to Naphthenes over Three-Dimensional Flower-like Ni₂P Derived from Hydrotalcite

In Situ Synthesis Strategy for Hierarchically Porous Ni₂P Polyhedrons from MOFs Templates with Enhanced Electrochemical Properties for Hydrogen Evolution

High-Performance Ni₃P Catalyst for C═O Hydrogenation of Ethyl Levulinate: Ni^δ+ as Outstanding Adsorption Sites

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Preparation of Ni 2 P/Al 2 O 3 by temperature-programmed reduction of a phosphate precursor with a low P/Ni ratio

Cited by 32 publications

References 25 publications

Highly Selective Hydrodeoxygenation of Lignin to Naphthenes over Three-Dimensional Flower-like Ni2P Derived from Hydrotalcite

Highly Selective Hydrodeoxygenation of Lignin to Naphthenes over Three-Dimensional Flower-like Ni2P Derived from Hydrotalcite

In Situ Synthesis Strategy for Hierarchically Porous Ni2P Polyhedrons from MOFs Templates with Enhanced Electrochemical Properties for Hydrogen Evolution

High-Performance Ni3P Catalyst for C═O Hydrogenation of Ethyl Levulinate: Niδ+ as Outstanding Adsorption Sites

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Highly Selective Hydrodeoxygenation of Lignin to Naphthenes over Three-Dimensional Flower-like Ni₂P Derived from Hydrotalcite

Highly Selective Hydrodeoxygenation of Lignin to Naphthenes over Three-Dimensional Flower-like Ni₂P Derived from Hydrotalcite

In Situ Synthesis Strategy for Hierarchically Porous Ni₂P Polyhedrons from MOFs Templates with Enhanced Electrochemical Properties for Hydrogen Evolution

High-Performance Ni₃P Catalyst for C═O Hydrogenation of Ethyl Levulinate: Ni^δ+ as Outstanding Adsorption Sites