高活性三维花型Co-Ni/C双金属催化剂用于邻氯硝基苯选择性加氢反应

采用简单的水热/溶剂热法,经后续在氮气气氛中的热处理合成了三维花型Co-Ni/C双金属催化剂,它由交织炭片构成,金属纳米颗粒高度分散其中.随着Co/Ni摩尔比的增加,金属颗粒的粒径逐渐从26nm减至4nm左右.将该催化剂用于邻氯硝基苯选择性加氢制备邻氯苯胺反应,其催化活性最高为单金属催化活性的2倍.这是由于Co和Ni物种之间存在协同效应.氢气程序升温脱附结果显示,Co/Ni合金的生成使得Co50Ni50/C催化剂产生了新的催化活性位,因而其活性显著提高....

Full description

Saved in:
Bibliographic Details
Published in催化学报 Vol. 33; no. 12; pp. 1883 - 1888
Main Author 解雅玲 肖南 凌铮 柳月 于畅 邱介山
Format Journal Article
LanguageChinese
Published 大连理工大学辽宁省能源材料化工重点实验室,大连理工大学精细化工国家重点实验室,辽宁大连 116024 2012
Subjects
加氢反应
协同效应
双金属催化剂
纳米碳材料
邻氯硝基苯
钴
镍
双金属催化剂
nickel
加氢反应
cobalt
纳米碳材料
镍
hydrogenation
o-chloronitrobenzene
协同效应
carbon nanomaterials
钴
邻氯硝基苯
bimetallic catalyst
synergistic effect
Online AccessGet full text
ISSN0253-9837
1872-2067
DOI10.1016/S1872-2067(11)60451-8

Cover

More Information
Summary:采用简单的水热/溶剂热法,经后续在氮气气氛中的热处理合成了三维花型Co-Ni/C双金属催化剂,它由交织炭片构成,金属纳米颗粒高度分散其中.随着Co/Ni摩尔比的增加,金属颗粒的粒径逐渐从26nm减至4nm左右.将该催化剂用于邻氯硝基苯选择性加氢制备邻氯苯胺反应,其催化活性最高为单金属催化活性的2倍.这是由于Co和Ni物种之间存在协同效应.氢气程序升温脱附结果显示,Co/Ni合金的生成使得Co50Ni50/C催化剂产生了新的催化活性位,因而其活性显著提高.
Bibliography:XIE Yaling, XIAO Nan, LING Zheng, LIU Yue, YU Chang, QIU Jieshan Carbon Research Laboratory, Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, Dalian University of Technology, Dalian 116024, Liaoning, China
cobalt; nickel; carbon nanomaterials; bimetallic catalyst; synergistic effect; o-chloronitrobenzene; hydrogenation
Three dimensional flower-like Co-Ni/C bimetallic catalysts composed of interlaced carbon flakes with highly dispersed metal nanoparticles were synthesized by a facile hydrothermal/solvothermal process followed by a heat treatment in flowing N2.The sizes of the metal nanoparticles were from 26 to 4 nm, which became smaller as the Co/Ni molar ratio increased. The catalytic activities for the selective hydrogenation of o-chloronitrobenzene to o-chloroaniline were tested. The conversion of o-chloronitrobenzene over the bimetallic Co-Ni/C catalysts was increased by up to 200% compared with that over a mono-metallic Co/C catalyst, which was due to a syner
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(11)60451-8