Bicomponent VO2-defects/MWCNT catalyst for hydroxylation of benzene to phenol: Promoter effect of defects on catalytic performance

Bicomponent VO2-defects/MWCNT catalyst for hydroxylation of benzene to phenol: Promoter effect of defects on catalytic performance
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用于苯羟基化制苯酚的双组分 VO2 缺陷/MWCNT 催化剂:缺陷对催化性能的促进作用

DOI:
10.1016/j.apcata.2011.05.023
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发表时间:
2011-07
期刊:
Applied Catalysis A: General
影响因子:
--
通讯作者:
Zhang, Aimin
Zhang, Aimin
中科院分区:
其他
文献类型:
--
作者:
Song, Shaoqing;Jiang, Shujuan;Rao, Richuan;Yang, Hongxiao;Zhang, Aimin

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以多壁碳纳米管(MWCNTs)为载体,以缺陷为促进剂,制备了一种新型的VO 2/MWCNTs双组分催化剂(VO 2-defects/MWCNTs),用于苯羟基化合成苯酚。在双组分体系中,通过V5+与MWCNTs缺陷之间的自发氧化还原反应,制备了2- 10 nm的VO 2纳米粒子。此外,多壁碳纳米管的缺陷首次被用来作为促进剂,以防止苯酚的氧化和转移电子的催化。因此,与其他钒催化剂相比,VO 2-defects/MWCNTs对苯羟基化合成苯酚具有优异的催化性能,表明缺陷作为助剂在催化苯羟基化反应中具有很好的应用前景。
A novel bicomponent catalyst, VO2supported on multi-walled carbon nanotubes (MWCNTs) with defects as promoter (VO2-defects/MWCNTs) was synthesized for the hydroxylation of benzene to phenol. In the bicomponent system, VO2nanoparticles with 2–10nm were prepared by the spontaneous redox between V5+and defects of MWCNTs. Moreover, defects of MWCNTs were firstly used as promoters for preventing the oxidation of phenol and transferring electrons in the catalysis. Thus, compared with other vanadium catalysts, VO2-defects/MWCNTs show excellent catalytic performance for the hydroxylation of benzene to phenol, which indicates defects as promoter are quite promising for catalyzing the hydroxylation of benzene.
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