JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Bolong Jiang,Tianhan Zhu,Hua Song,Feng Li
The Fe-doped Ni 2 P/Fe-SBA-15 was prepared by the temperature programmed reduction method at a relative low temperature of 673 K. The effect of Fe on the catalytic performance for benzofuran (BF) hydrodeoxygenation (HDO) and dibenzothiophene (DBT) hydrodesulfurization (HDS) were investigated. The catalysts were characterized by means of X-ray diffraction (XRD), N 2 adsorption-desorption, inductively coupled plasma mass spectrometry (ICP-MS), X-ray photoelectron spectroscopy (XPS), temperature-programmed desorption of ammonia (NH 3 -TPD), and transmission electron microscope (TEM) and CO uptakes. The results indicate the incorporation of Fe into SBA-15 contributes to the exposure of smaller Ni 2 P particles (5.6 nm) with an uniform dispersion, along with enhancement of weak and medium acid strengths . Compared with Ni 2 P/SBA-15, the Fe-doped Ni 2 P/Fe-SBA-15 exhibited a much higher BF conversion of 91.7% with an improved total deoxygenated product yield of 83.3%. The excellent HDO performance of Ni 2 P/Fe-SBA-15 can be ascribed to the exposure of highly-dispersed smaller Ni 2 P particles. Meanwhile, the improved dehydration of 2-EtPh to EB and the high deoxygenated product selectivity can be attributed to the enhanced acidity. As compared to the Ni 2 P/SBA-15, the Fe-doped Ni 2 P/Fe-SBA-15 showed a higher DBT HDS activity of 96.3% with the BP formation at a great proportion of 90.3%, indicating that DBT was mainly transformed through the desulfurization pathway during HDS.
研究领域:
催化化学
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能源化学
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产品关联
DOI
高影响因子
Journal of the American Chemical Society
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2021
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IF 15.419
Qi Wang,Zhe Zhang,Chao Cai,Maoyu Wang,Zhi Liang Zhao,Menghao Li,Xiang Huang,Shaobo Han,Hua Zhou,Zhenxing Feng,Lei Li,Jun Li,Hu Xu,Joseph S. Francisco,Meng Gu
Single-atom catalysts (SACs) with 100% active sites have excellent prospects for application in the oxygen evolution reaction (OER). However, further enhancement of the catalytic activity for OER is quite challenging, particularly for the development of stable SACs with overpotentials <180 mV. Here, we report an iridium single atom on Ni2P catalyst (IrSA-Ni2P) with a record low overpotential of 149 mV at a current density of 10 mA·cm–2 in 1.0 M KOH. The IrSA-Ni2P catalyst delivers a current density up to ∼28-fold higher than that of the widely used IrO2 at 1.53 V vs RHE. Both the experimental results and computational simulations indicate that Ir single atoms preferentially occupy Ni sites on the top surface. The reconstructed Ir–O–P/Ni–O–P bonding environment plays a vital role for optimal adsorption and desorption of the OER intermediate species, which leads to marked enhancement of the OER activity. Additionally, the dynamic “top-down” evolution of the specific structure of the Ni@Ir particles is responsible for the robust single-atom structure and, thus, the stability property. This IrSA-Ni2P catalyst offers novel prospects for simplifying decoration strategies and further enhancing OER performance.
研究领域:
材料科学
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催化化学
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能源化学
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产品关联
DOI
PubMed
高影响因子
CATALYSIS COMMUNICATIONS
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2016
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IF 3.389
Dapeng Liu,Anjie Wang,Chenguang Liu,Roel Prins
Bulk Ni 2 P and Al 2 O 3 -supported Ni 2 P were prepared at low phosphidation temperature (300 °C) from Ni 9 S 8 and NH 4 H 2 PO 2 , which were separated to avoid the formation of phosphate inside the support pores. The unsupported product phases were characterized by XRD and the Ni 2 P/Al 2 O 3 catalysts by XRD, BET and TEM. A 10 wt.% Ni 2 P/Al 2 O 3 catalyst, made by the Ni(NO 3 ) 2 –NiO–Ni 9 S 8 –Ni 2 P path at a P/Ni ratio of 3, showed the highest activity in the hydrodesulfurization of dibenzothiophene. By separating the nickel and hypophosphite sources, Ni 2 P/Al 2 O 3 catalysts could be obtained at low phosphidation temperature and with low degree of blockage of pores by surplus phosphorus.
研究领域:
催化化学
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材料科学
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DOI
高影响因子
CATALYSIS LETTERS
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2022
·Vol. 153
·期 3
·911-920
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IF 2.936
Geng Yanyan,Lang Man,Li Guotai,Yin Wang,Yang Zhensheng,Li Hao
Developing efficient catalysts for biomass hydrodeoxygenation into high-quality biofuels and chemicals is a current topic of great interest. In this study, Ni 2 P catalysts supported on different zeolites (MCM-41, HY, Hβ) were fabricated for vanillin hydrodeoxygenation by one-pot method instead of temperature-programmed reduction (TPR). The prepared catalysts were characterized using XRD, XPS, NH 3 -TPD and N 2 physisorption. The results showed that the support has a significant influence on the reactivity of the Ni 2 P-based catalyst. The Ni 2 P/HY catalyst contains a higher acid site density, which leads to the almost complete conversion of vanillin to the quantitative yield of 2-methoxy-4-methylphenol (MMP) via direct hydrogenolysis path at 220 °C, 5 h and 2 MPa of H 2 . Graphical Abstract
研究领域:
催化化学
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能源化学
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DOI
高影响因子
ACS Catalysis
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2022
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IF 13.7
Zhichao Jia,Na Ji,Xinyong Diao,Xinxin Li,Yujun Zhao,Xuebin Lu,Qingling Liu,Caixia Liu,Guanyi Chen,Longlong Ma,Shurong Wang,Chunfeng Song,Changzhi Li
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.
研究领域:
催化化学
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能源化学
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材料科学
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产品关联
DOI
高影响因子
ENERGY EXPLORATION & EXPLOITATION
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2020
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IF 1.382
Riyi Lin,Huida Pan,Weidong Xu,Liqiang Zhang,Xinwei Wang,Jianliang Zhang,Kai Chen
The study of benzothiophene hydrodesulfurization reaction path contribute to clarifying the mechanism of hydrodesulfurization (HDS) of heavy oil. In this work, experiments and simulations were combined to study the reaction pathway of benzothiophene hydrodesulfurization catalyzed by Ni2P. In experimental part, Ni2P catalyst was prepared and characterized. Then, the catalytic property of the catalyst for benzothiophene hydrodesulfurization was evaluated. The substance types and contents in the liquid phase products were detected to verify the accuracy of the simulation results. Dmol3 module of the Materials Studio (MS) simulation software was used to simulate the adsorption and hydrodesulfurization of benzothiophene on the surface of Ni2P catalyst and explore the most probable reaction path. The results showed that the most stable adsorption configuration of benzothiophene on the surface of Ni2P was Ni-hcp. In addition, indirect desulfurization of benzothiophene was more advantageous than direct desulfurization. The most possible path for indirect desulfurization was Benzothiophene (BT) – Dihydrobenzothiophene (DHBT) – C8H9S2 – 2-phenylethyl mercaptan (PET) – Ethylbenzene (EB), while that of direct desulfurization was Benzothiophene (BT) – C8H7S2 – Styrene thiol (CMT) – Styrene (ST) – Ethylbenzene (EB).
研究领域:
催化化学
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材料科学
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石油加工工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Yanxin Bai,Xiang Gong,Na Ye,Xiaoying Qi,Zhao Jiang,Tao Fang
To facilitate the electrocatalytic behavior of Direct Ethanol Fuel Cells (DEFCs), a sequence of bimetallic Pd x Cu y /Ni 2 P-C catalysts are synthesized via the microwave-assisted ethylene glycol reduction method. The results indicate that our designed Pd 2 Cu/Ni 2 P-C(1:1) catalyst owns high activity (3974.08 mA mg −1 Pd ), 8.3 times higher than the commercial Pd/C. The durability and the CO tolerance of the corresponding catalysts are also investigated by chronoamperometry (CA) and CO stripping measurements, implying Pd 2 Cu/Ni 2 P-C(1:1) shows good durability and the anti-CO poisoning ability for EOR in alkaline media . The electrochemical impedance spectra (EIS) analysis reveals lower charge transfer resistance for Pd 2 Cu/Ni 2 P-C(1:1). Combined with the results of XRD , HRTEM , XPS and electrochemical measurements, we found that the good electrocatalytic activity , CO tolerance and long-term durability of Pd 2 Cu/Ni 2 P-C(1:1) may be provided by the electronic and strain effect among Pd, Cu and Ni 2 P, which will bring the downshift in the d-band center of catalysts and the weakened adsorption of intermediates.
研究领域:
材料科学
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电化学
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能源技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）