Hydrogenation of 3-nitro-4-methoxy-acetylaniline with H<sub>2</sub> to 3-amino-4-methoxy-acetylaniline catalyzed by bimetallic copper/nickel nanoparticles

Yang, Chengli; Xue, Wei; Yin, Hengbo; Lü, Zhipeng; Wang, Aili; Shen, Lingqin; Jiang, Yunyan

doi:10.1039/c7nj00066a

Cited by 26 publications

(10 citation statements)

References 35 publications

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“…The kinetic assessments of xylose hydrogenation to xylitol over the 20Ni/SiO 2 and representative 5Cu15Ni/SiO 2 catalysts were performed. Firstly, the influence from mass diffusion was eliminated by using the different catalyst dosages (0.05–0.20 g) for xylose (5 wt %) conversion under the conditions of 120 °C and 4 MPa for 0.5 h. The results listed in Figure a,b demonstrate that the initial reaction rate was not affected by mass diffusion . Thus, the catalyst dosage for the following experiment was fixed at 0.1 g.…”

Section: Resultsmentioning

confidence: 99%

“…Firstly, the influence from mass diffusion was eliminated by using the different catalyst dosages (0.05−0.20 g) for xylose (5 wt %) conversion under the conditions of 120 °C and 4 MPa for 0.5 h. The results listed in Figure 6a,b demonstrate that the initial reaction rate was not affected by mass diffusion. 51 Thus, the catalyst dosage for the following experiment was fixed at 0.1 g. The powder-law reaction kinetics equation using a pseudohomogeneous kinetic model for xylose hydrogenation is presented in the following formula. The kinetic parameters are summarized in Table 5.…”

Section: ■ Introductionmentioning

confidence: 99%

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Xylitol Production from Xylose by Catalytic Hydrogenation over an Efficient Cu–Ni/SiO₂ Bimetallic Catalyst

Jiang

et al. 2023

ACS Sustainable Chem. Eng.

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Xylitol is a value-added health product from the hemicellulose component in biomass. In this work, highly efficient Cu–Ni/SiO2 catalysts are developed for the production of xylitol by means of xylose hydrogenation. The bimetallic catalysts exhibit higher activity compared to the corresponding monometallic nickel or copper catalyst and the currently used industrial Raney nickel catalyst. The bimetallic catalyst with a higher ratio of nickel to copper shows a better performance. The 5Cu15Ni/SiO2 catalyst exhibits a xylose conversion of 96% accompanied by higher than 99% selectivity to xylitol under the moderate conditions of 100 °C and 3MPa H2. The bimetallic catalysts show improved performances when they are activated at a low temperature. The apparent activation energies of xylose hydrogenation over the 5Cu15Ni/SiO2 and 20Ni/SiO2 catalysts are 16.6 and 25.2 kJ/mol, respectively. The formation of the Cu–Ni alloy leads to a lower activation energy and thus superior performance for xylose hydrogenation to xylitol.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Xylitol Production from Xylose by Catalytic Hydrogenation over an Efficient Cu–Ni/SiO₂ Bimetallic Catalyst

Jiang

et al. 2023

ACS Sustainable Chem. Eng.

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“…: 04–0850; Figures i(e) and S6). With respect to Ni, the diffraction peaks of Ni–Cu in Ni–Cu/NC are meagerly shifted to lower angles (Figures i(f) and S6), enumerating the integration of Cu atoms into the Ni lattice in the form of a bimetallic structure …”

Section: Resultsmentioning

confidence: 99%

Trimetallic ZIF-Derived Ni–Cu/NC Rhombic Dodecahedron Nanostructures on Butter Sheet Paper as a Flexible Electrochemical Probe for Nonenzymatic Glucose Sensors

Pappathi,

Vajeeston,

Sahaya Raja

et al. 2023

ACS Appl. Nano Mater.

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Rhombic dodecahedron-architectured Ni−Cu nanostructures pinned with N-doped carbon (Ni−Cu/NC) are manufactured using Ni−Cu−zeolitic imidazolate frameworks (Ni−Cu−ZIF-8) as soft templates. The as-established ZIF-8 and metal/NC series nanocatalysts are loaded on biodegradable butter sheet papers (BSPs) and used as flexible electrochemical probes for high-performance electrochemical nonenzymatic glucose sensors (ENEGSs). The optimized molecular and electronic structures and charge density distribution of as-formulated ZIF-8 and metal/C series nanostructures are realized with DFT studies, and the influences of aforesaid unique properties on glucose electrooxidation are established with various electrochemical techniques. Owing to the robust carbon network-interlaced metallic units, high electrical conductivity, large surface area, and extended active sites, Ni−Cu−ZIF-8-derived Ni−Cu/NC demonstrates the elevated ENEGS performance including lower detection limit, high sensitivity, and elevated specificity under alkaline regimes that actualize Ni−Cu/NC/BSP's practical glucose sensing recognition in human serum. Thus, the as-fabricated Ni−Cu/NC/BSP extends exclusive benefits of having simple fabrication and being cost-efficient, reliable, and reusable, along with high glucose sensing performance, accessing innovative conveniences to epitomize technically sound and economically viable boulevards in the amplification of ENEGSs.

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“…The procedure of creating nanoparticles by sputtering could be readily expanded to the direct deposition of mixed nanoparticles [ 31 ]. High activities in the reduction of similar substrates with mixed metal particles have been reported [ 32 ]. This could occur either from an alloy target or by sputtering from two different targets simultaneously.…”

Section: Discussionmentioning

confidence: 99%

Silicone Nanofilament Support Layers in an Open-Channel System for the Fast Reduction of Para-Nitrophenol

Naef

Seeger

2021

Nanomaterials

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Chemical vapor phase deposition was used to create hydrophobic nanostructured surfaces on glass slides. Subsequently, hydrophilic channels were created by sputtering a metal catalyst on the channels while masking the outside. The surface tension gradient between the hydrophilic surface in the channels and the outside hydrophobicity formed the open-channel system. The reduction of para-nitrophenol (PNP) was studied on these devices. When compared to nanostructure-free reference systems, the created nanostructures, namely, silicone nanofilaments (SNFs) and nano-bagels, had superior catalytic performance (73% and 66% conversion to 55% at 0.5 µL/s flow rate using 20 nm platinum) and wall integrity; therefore, they could be readily used multiple times. The created nanostructures were stable under the reaction conditions, as observed with scanning electron microscopy. Transition electron microscopy studies of platinum-modified SNFs revealed that the catalyst is present as nanoparticles ranging up to 13 nm in size. By changing the target in the sputter coating unit, molybdenum, gold, nickel and copper were evaluated for their catalytic efficiency. The relative order was platinum < gold = molybdenum < nickel < copper. The decomposition of sodium borohydride (NaBH4) by platinum as a concurrent reaction to the para-nitrophenol reduction terminates the reaction before completion, despite a large excess of reducing agent. Gold had the same catalytic rate as molybdenum, while nickel was two times and copper about four times faster than gold. In all cases, there was a clear improvement in catalysis of silicone nanofilaments compared to a flat reference system.

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Hydrogenation of 3-nitro-4-methoxy-acetylaniline with H₂ to 3-amino-4-methoxy-acetylaniline catalyzed by bimetallic copper/nickel nanoparticles

Abstract: The presence of a Cu–Ni alloy phase favored the catalytic hydrogenation of 3-nitro-4-methoxy-acetylaniline to 3-amino-4-methoxy-acetylaniline.

Cited by 26 publications

References 35 publications

Xylitol Production from Xylose by Catalytic Hydrogenation over an Efficient Cu–Ni/SiO₂ Bimetallic Catalyst

Xylitol Production from Xylose by Catalytic Hydrogenation over an Efficient Cu–Ni/SiO₂ Bimetallic Catalyst

Trimetallic ZIF-Derived Ni–Cu/NC Rhombic Dodecahedron Nanostructures on Butter Sheet Paper as a Flexible Electrochemical Probe for Nonenzymatic Glucose Sensors

Silicone Nanofilament Support Layers in an Open-Channel System for the Fast Reduction of Para-Nitrophenol

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Hydrogenation of 3-nitro-4-methoxy-acetylaniline with H2 to 3-amino-4-methoxy-acetylaniline catalyzed by bimetallic copper/nickel nanoparticles

Abstract: The presence of a Cu–Ni alloy phase favored the catalytic hydrogenation of 3-nitro-4-methoxy-acetylaniline to 3-amino-4-methoxy-acetylaniline.

Cited by 26 publications

References 35 publications

Xylitol Production from Xylose by Catalytic Hydrogenation over an Efficient Cu–Ni/SiO2 Bimetallic Catalyst

Xylitol Production from Xylose by Catalytic Hydrogenation over an Efficient Cu–Ni/SiO2 Bimetallic Catalyst

Trimetallic ZIF-Derived Ni–Cu/NC Rhombic Dodecahedron Nanostructures on Butter Sheet Paper as a Flexible Electrochemical Probe for Nonenzymatic Glucose Sensors

Silicone Nanofilament Support Layers in an Open-Channel System for the Fast Reduction of Para-Nitrophenol

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Hydrogenation of 3-nitro-4-methoxy-acetylaniline with H₂ to 3-amino-4-methoxy-acetylaniline catalyzed by bimetallic copper/nickel nanoparticles

Xylitol Production from Xylose by Catalytic Hydrogenation over an Efficient Cu–Ni/SiO₂ Bimetallic Catalyst

Xylitol Production from Xylose by Catalytic Hydrogenation over an Efficient Cu–Ni/SiO₂ Bimetallic Catalyst