Preparation of highly effective carbon black supported Pd–Pt bimetallic catalysts for nitrobenzene hydrogenation

双金属片 催化作用 材料科学 硝基苯 炭黑 化学工程 无机化学 金属 化学 有机化学 冶金 复合材料 工程类 天然橡胶
作者
Ádám Prekob,Gábor Muránszky,Milán Szőri,Gábor Karacs,Ferenc Kristály,Tibor Ferenczi,Béla Fiser,Béla Viskolcz,László Vanyorek
出处
期刊:Nanotechnology [IOP Publishing]
卷期号:32 (42): 425701-425701 被引量:6
标识
DOI:10.1088/1361-6528/ac137d
摘要

Carbon black (CB) supported palladium-platinum catalysts were prepared with and without nickel(II) oxide or iron(III) oxide promoter materials. By applying ultrasonic cavitation highly efficient CB supported catalysts were created. The designed catalyst preparation is a one-step procedure, as post-treatments (e.g. calcination, hydrogen activation) are not necessary. The activation of the catalysts occurs during their preparation due to the ultrasonic cavitation. Thus, a fast and simple catalyst preparation procedure have been developed. The activity of the catalysts was compared in nitrobenzene hydrogenation at different temperatures in the range of 283-323 K at 20 bar hydrogen pressure. In terms of selectivity and aniline yield, no significant differences were detected even when promoters were present. By using the NiO promoter, the activation energy was extremely low (7.6 ± 0.7 kJ mol-1). The selectivity was over 99% in every case, and 99.6% aniline yield was achieved without any promoters (99.7% with NiO), while less than 1.0% by-products were formed. The reaction rate was high with every catalyst, and no significant differences were detected. All in all, the prepared catalysts show excellent catalytic activity in the hydrogenation of nitrobenzene.
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