The effect of neodymium content on dibenzothiophene HDS performance over a bulk Ni2P catalyst

Song, Hua; Zhang, Fuyong; Song, Hualin; Xu, Xiaowei; Li, Feng

doi:10.1016/j.catcom.2015.05.028

Cited by 17 publications

(6 citation statements)

References 18 publications

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“…Considering Ni 2p under H 2 S atmosphere ( Figure 8 h), the Ni2p 1/2 and Ni2p 3/2 peaks were observed at 874.7 and 856 eV, respectively [ 47 ]. From Figure 8 l, Ni2p 1/2 and Ni2p 3/2 peaks were identified at 872.6 and 856 eV, besides the two shake-up satellites.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

et al. 2022

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Recently, electrocatalysts for oxygen reduction reaction (ORR) as well as oxygen evolution reaction (OER) hinged on electrospun nanofiber composites have attracted wide research attention. Transition metal elements and heteroatomic doping are important methods used to enhance their catalytic performances. Lately, the construction of electrocatalysts based on metal-organic framework (MOF) electrospun nanofibers has become a research hotspot. In this work, nickel-cobalt zeolitic imidazolate frameworks with different molar ratios (NixCoy-ZIFs) were synthesized in an aqueous solution, followed by NixCoy-ZIFs/polyacrylonitrile (PAN) electrospun nanofiber precursors, which were prepared by a simple electrospinning method. Bimetal (Ni-Co) porous carbon nanofiber catalysts doped with nitrogen, oxygen, and sulfur elements were obtained at high-temperature carbonization treatment in different atmospheres (argon (Ar), Air, and hydrogen sulfide (H2S)), respectively. The morphological properties, structures, and composition were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Moreover, the specific surface area of materials and their pore size distribution was characterized by Brunauer-Emmett-Teller (BET). Linear sweep voltammetry curves investigated catalyst performances towards oxygen reduction and evolution reactions. Importantly, Ni1Co2-ZIFs/PAN-Ar yielded the best ORR activity, whereas Ni1Co1-ZIFs/PAN-Air exhibited the best OER performance. This work provides significant guidance for the preparation and characterization of multi-doped porous carbon nanofibers carbonized in different atmospheres.

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Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

et al. 2022

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“…The Ni 2 P catalysts were prepared by the co-precipitation method according to Song and co-workers 8,9 Briefly, the oxidic precursor of bulk Ni 2 P was prepared with excess phosphorus, the mole ratio of nickel and phosphorus being 1. 12 Redundant phosphorus was used to effect the loss of phosphorus during the reduction stage.…”

Section: Methodsmentioning

confidence: 99%

“…Then, the precursors were reduced and passivated using the method described elsewhere. 9 The corresponding catalysts are denoted as Ti x -Ni 2 P, where the subscript x is the molar fraction of Ti with respect to Ni 2 P and has values of 0.005, 0.01 and 0.02. For comparison, a bulk Ni 2 P catalyst was prepared following the method described above.…”

Section: Preparation Of Catalystsmentioning

confidence: 99%

“…6 In order to improve the catalytic performance, a third component has been added to the Ni 2 P catalyst. 7 Our previous research showed that yttrium, 8 zinc, neodymium, 9 and calcium as elements can increase the surface area of the catalyst, resulting in smaller crystal size and better dispersion of active catalytic particles. It was found that the HDS activity of coprecipitation Ni 2 P catalysts can be enhanced by the addition of Ti.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ti on dibenzothiophene hydrodesulfurization performance over bulk Ni₂P

Han

Song

Jiang

et al. 2019

Progress in Reaction Kinetics and Mechanism

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A series of Ti-incorporated bulk Ni2P catalysts was prepared by means of temperature-programmed reduction, and the role of metallic Ti on the structure and catalytic activity of the Ni2P catalysts was studied. For this purpose, bulk Ni2P catalysts with metal Ti contents of 0.005 wt%, 0.01 wt%, and 0.02 wt% were synthesized. X-ray diffraction, CO uptake, Brunauer–Emmett–Teller measurements, and X-ray photoelectron spectroscopy were utilized to characterize the catalysts. Addition of titanium could increase the surface area and promote the formation of small, highly dispersed Ni2P particles. The Ti0.02-Ni2P system with a Ti molar fraction of 0.02 showed the highest hydrodesulfurization activity of 99.6%, which was an increase of 44% compared with that found for the bulk Ni2P.

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“…This makes it particularly important to design and develop innovative catalysts with excellent HDS performance for academia and industry [2][3][4][5][6]. In addition to improving the activity of typical Al2O3-supported Ni (Co) -Mo (W) sulfide HDS catalysts, noble metals, metal phosphides, metal silicides, metal borides, and metal carbides have all been used as catalysts for HDS reactions [7][8][9][10][11][12][13]. Among them, Ni2P is considered as a promising alternative to conventional HDS catalysts because of its high hydrogenation activity, good stability, and strong tolerance to sulfur and nitrogen [14,15].…”

Section: Introductionmentioning

confidence: 99%

Effects of pyrolyzing and phosphiding on dibenzothiophene hydrodesulfurization of MOF-derived Ni2P

Liu

Wang

et al. 2023

Preprint

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MOF template, MOF-derived Ni, and MOF-derived Ni2P were characterized by XRD, TG, SEM, TEM, XPS and Raman. Hydrodesulfurization (HDS) of dibenzothiophene of MOF-derived Ni2P suggests that its catalytic performance depends on the active center number of Ni2P (111), the size of Ni2P clusters, the phosphiding degree of Ni and the intervals between Ni2P clusters. Reducing the pyrolyzing temperature of MOF template can slow down particle aggregation and change the morphology of Ni and Ni2P from closely packed polyhedron to loosely packed petal-like. At the same time, the cluster size of Ni2P was significantly reduced, resulting in a higher HDS activity. Prolonging pyrolyzing time at low pyrolyzing temperature leads to the gradual removal of MOF framework and makes nickel aggregates more susceptible to phosphiding. This increases the ratio of Ni2P to Ni of the phosphidized material, resulting in higher HDS activity of MOF-derived Ni2P. In situ phosphiding of crystalline nickel with PH3 did not change the shape of aggregates, but change the surface morphology of MOF derivied Ni. Low-temperature phosphiding can generally form pure Ni2P species, while high-temperature phosphiding will form a variety of impurities including Ni5P4. This will lead to a decrease in HDS reaction performance of MOF-derived Ni2P catalyst.

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The effect of neodymium content on dibenzothiophene HDS performance over a bulk Ni2P catalyst

Cited by 17 publications

References 18 publications

Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

Effect of Ti on dibenzothiophene hydrodesulfurization performance over bulk Ni₂P

Effects of pyrolyzing and phosphiding on dibenzothiophene hydrodesulfurization of MOF-derived Ni2P

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The effect of neodymium content on dibenzothiophene HDS performance over a bulk Ni2P catalyst

Cited by 17 publications

References 18 publications

Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

Preparation and Characterization of Multi-Doped Porous Carbon Nanofibers from Carbonization in Different Atmospheres and Their Oxygen Electrocatalytic Properties Research

Effect of Ti on dibenzothiophene hydrodesulfurization performance over bulk Ni2P

Effects of pyrolyzing and phosphiding on dibenzothiophene hydrodesulfurization of MOF-derived Ni2P

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Effect of Ti on dibenzothiophene hydrodesulfurization performance over bulk Ni₂P