Noncrystalline NiPB nanotubes for hydrogenation of p-chloronitrobenzene

Mo, Min; Han, Ling; Lv, Jiangang; Zhu, Yan; Peng, Luming; Guo, Xuefeng; Ding, Weiping

doi:10.1039/b922256a

Cited by 31 publications

(20 citation statements)

References 24 publications

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“…This ultra-selectivity with respect to -NO 2 group reduction is a significant result as the hydrogenation of p-CNB has been invariably accompanied by dechlorination and sidereactions resulting in the formation of azoxyderivates, 68,69 aniline 70-72 and nitrobenzene. [71][72][73] This has been a feature of reaction over Ru-Ir/g-Al 2 O 3, 68 silica supported group VIII metals (Ag, Cu, Co Fe and Ni), 69 PtMO x (M = Sm, Pr, Ce, Nd and La) supported on carbon nanotubes 71 and unsupported NiB alloys (as nanotubes (20-25 nm) 73 and nanoparticles (6-100 nm)). 70,72 The variation in fractional p-CNB conversion (X p-CNB ) as a function of time-on-stream is presented (as an inset) in Fig.…”

Section: Gas Phase Hydrogenation Of P-chloronitrobenzene (P-cnb)mentioning

confidence: 99%

β-Molybdenum nitride: synthesis mechanism and catalytic response in the gas phase hydrogenation of p-chloronitrobenzene

Cárdenas‐Lizana

Gómez‐Quero

Perret

et al. 2011

Catal. Sci. Technol.

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UvA-DARE is a service provided by the library of the University of Amsterdam (http://dare.uva.nl) UvA-DARE (Digital Academic Repository)β-Molybdenum nitride: synthesis mechanism and catalytic response in the gas phase hydrogenation of p-chloronitrobenzene Cárdenas-Lizana, F.; Gómez Quero, S.; Perret, N.; Kiwi-Minsker, L.; Keane, M.A. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. A temperature programmed treatment of MoO 3 in flowing N 2 + H 2 has been employed to prepare b-phase molybdenum nitride (b-Mo 2 N) which has been used to promote, for the first time, the catalytic hydrogenation of p-chloronitrobenzene. The reduction/nitridation synthesis steps have been monitored in situ and the starting oxide, reaction intermediates and nitride product have been identified and characterized by powder X-ray diffraction (XRD), diffuse reflectance UV-Vis (DRS UV-Vis), elemental analysis, scanning electron microscopy (SEM) and BET/pore volume measurements. Our results demonstrate that MoO 3 -b-Mo 2 N is a kinetically controlled process where an initial reduction stage generates (sequentially) MoO 2 and Mo as reaction intermediates with a subsequent incorporation of N to produce b-Mo 2 N. SEM analysis has established that the transformation is non-topotactic with a disruption to the platelet morphology that characterizes MoO 3 and an increase in BET area (from 1 m 2 g À1 to 17 m 2 g À1). Moreover, temperature programmed desorption measurements have revealed a significant hydrogen uptake (0.71 mmol m À2 ) on b-Mo 2 N. This has been exploited in the hydrogenation of p-chloronitrobenzene where p-chloroaniline was generated as the sole product with an associated rate constant (k = 2.0 min À1) that is higher than values recorded for supported transition metals. Our study establishes the reaction mechanism involved in the synthesis of b-Mo 2 N and demonstrates its viability to promote selective -NO 2 group reduction as an alternative sustainable, high throughput route to commercially important haloamines.

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Section: Gas Phase Hydrogenation Of P-chloronitrobenzene (P-cnb)mentioning

confidence: 99%

β-Molybdenum nitride: synthesis mechanism and catalytic response in the gas phase hydrogenation of p-chloronitrobenzene

Cárdenas‐Lizana

Gómez‐Quero

Perret

et al. 2011

Catal. Sci. Technol.

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“…The TEM image of Ni-B NTs is shown in Fig. 2b, 60-65 nm in diameter and several microns in length, as we previously reported [7,10]. Fig.…”

Section: Resultsmentioning

confidence: 62%

“…4) of the Ni-B NTs, Ni-Cu-B NTs and NiCu-B NPs reveals that the NT catalysts are much more active than the common NP catalyst. The enhancement in catalytic activity of NTs may be attributed to the greater surface area, which ensures high dispersion of Ni active sites [17], and the NT structure of the catalyst, which would also be beneficial to the catalytic performances [6,7]. Specially, Ni-Cu-B NTs show higher catalytic activity than the Ni-B NTs.…”

Section: Catalystmentioning

confidence: 93%

“…Their practical applications are still limited due to the low surface area and poor thermal stability. Recently, catalysts with nanotubular (NT) structure have attracted increasing interests due to their larger surface area and special nanosized tubular structure, which could serve as a nonareactor using the inner cavity to improve the collision possibility of the reactant [5][6][7][8][9]. We had previously reported the first noncrystalline alloy Ni-B nanotubes (NTs) fabricated through a man-made layered liquid crystal (LC) template, which exhibit higher activity in the hydrogenation of nitrobenzene (NB) in comparison with the corresponding nanoparticles [10].…”

Section: Introductionmentioning

confidence: 99%

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Tri-component noncrystalline Ni–Cu–B nanotubes with enhanced stability and catalytic performance for hydrogenation of p-chlorinitrobenzene

Zhou

Xie

et al. 2015

Catalysis Communications

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“…[82][83][84][85][86][87][88] Many groups have paid intensive attention to this area and made great progress in exploiting amorphous alloys with controllable morphology. [42][43][44][89][90][91][92][93][94][95][96][97][98][99][100][101][102] In the following section, we will discuss some salient features of morphology-controllable synthesis of amorphous alloy via chemical reduction method using examples mainly from the authors' lab.…”

Section: Morphology Controlmentioning

confidence: 99%

Chapter 4. Preparation and catalytic applications of amorphous alloys

Li¹,

Wei²,

Zhao³

et al.

Catalysis

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Amorphous alloys are one of the most important catalytic materials and considered as a new generation of metallic catalysts. Mastery over the composition and/or morphology of amorphous alloy enables control of its properties and enhancement of its applications as catalyst. The aim of this chapter is to present the recent developments in the design-and fabrication of amorphous alloys through chemical reduction method with an emphasis on composition-and morphology control. The examples discussed in this review highlight the need to design and synthesis of amorphous alloy with controllable composition or morphology in order to promote catalytic performances. Perhaps more importantly, they also are of value for researchers in the area of heterogeneous catalysis to develop highlyefficient metallic catalysts.

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Noncrystalline NiPB nanotubes for hydrogenation of p-chloronitrobenzene

Abstract: High quality noncrystalline NiPB nanotubes were synthesized and exhibited high efficiency for the catalytic hydrogenation of p-chloronitrobenzene due to the characteristic confinement effect of the nanotubes.

Cited by 31 publications

References 24 publications

β-Molybdenum nitride: synthesis mechanism and catalytic response in the gas phase hydrogenation of p-chloronitrobenzene

β-Molybdenum nitride: synthesis mechanism and catalytic response in the gas phase hydrogenation of p-chloronitrobenzene

Tri-component noncrystalline Ni–Cu–B nanotubes with enhanced stability and catalytic performance for hydrogenation of p-chlorinitrobenzene

Chapter 4. Preparation and catalytic applications of amorphous alloys

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