Effect of Cu<sub>2</sub>O/TiO<sub>2</sub> catalyst support in formaldehyde ethynylation

LI Haitao; NIU Zhuzhu; YANG Guofeng; ZHANG Hongxi; WANG Zhipeng; ZHAO Yongxiang

doi:10.11949/j.issn.0438-1157.20171262

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Effect of Cu₂O/TiO₂ catalyst support in formaldehyde ethynylation

更新时间：2025-12-10

- Effect of Cu₂O/TiO₂ catalyst support in formaldehyde ethynylation
- CIESC Journal Issue 6, Pages: 2512-2518(2018)
- 作者机构：
  
  山西大学化学化工学院, 精细化学品教育部工程研究中心,山西,太原,030006
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171262
  CLC： Q028.8
- Online First：05 June 2018，
  
  Published：05 June 2018
- 稿件说明：
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LI Haitao, NIU Zhuzhu, YANG Guofeng, et al. Effect of Cu₂O/TiO₂ catalyst support in formaldehyde ethynylation[J]. CIESC Journal, 2018, (6): 2512-2518. DOI: 10.11949/j.issn.0438-1157.20171262.
DOI：

LI Haitao, NIU Zhuzhu, YANG Guofeng, et al. Effect of Cu₂O/TiO₂ catalyst support in formaldehyde ethynylation[J]. CIESC Journal, 2018, (6): 2512-2518. DOI: 10.11949/j.issn.0438-1157.20171262. DOI：

摘要

以不同温度焙烧的TiO2为载体，CuCl2·2H2O为铜源，NaOH为沉淀剂，L-抗坏血酸钠为还原剂，采用液相还原-沉积沉淀法制备了Cu2O/TiO2，借助X射线粉末衍射（XRD）、H2程序升温还原（H2-TPR）、N2-物理吸附、透射电镜（TEM）、X射线光电子能谱（XPS）等手段，研究了TiO2载体焙烧温度对Cu2O/TiO2甲醛乙炔化反应性能的影响。结果表明，低温焙烧得到的TiO2载体以锐钛矿相存在，与Cu2O物种间具有弱的相互作用，使得Cu2O被过度还原为金属Cu，催化活性较低。随着载体焙烧温度的升高，TiO2中出现金红石相，Cu2O与载体间相互作用增强，Cu2O高效转变为乙炔亚铜活性物种，使催化剂表现出最佳的催化性能。

Abstract

A series of Cu2O/TiO2 catalysts were prepared by liquid reduction-deposition-precipitation technique from copper chloride as copper source

sodium hydroxide as precipitant

sodium L-ascrobate as reducer

and TiO2 calcined at different temperatures as support. The catalysts were characterized by X-ray diffraction (XRD)

H2-temperature programmed reduction (H2-TPR)

nitrogen physisorption

transmission electron microscopy (TEM)

and X-ray photoelectron spectroscopy (XPS). The catalytic activity of these catalysts were studied in formaldehyde ethynylation. The results showed that calcination temperature of TiO2 support had great influence on the catalytic activity of Cu2O/TiO2. TiO2 calcined at low temperature presented mainly as anatase phase and had weak interaction with Cu2O

which could cause over reduction of active Cu2O to inactive metal Cu and result in the decrease of catalytic activity. With the increase of calcination temperature

anatase TiO2 gradually transformed to rutile TiO2 which could inhibit over reduction of active Cu2O due to its strong interaction with Cu2O. As a result of efficient conversion of Cu2O to active Cu (I) ethynlate

the Cu2O/TiO2 catalyst with TiO2 support calcined at high temperatures had the best catalytic activity.

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Effect of Cu2O/TiO2 catalyst support in formaldehyde ethynylation

DOI：10.11949/j.issn.0438-1157.20171262

摘要

Abstract

关键词

Keywords

references

Effect of Cu₂O/TiO₂ catalyst support in formaldehyde ethynylation