Enhanced CO Oxidation Rate over Embedded Au@Fe_2O_3-Hollow Catalysts
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- 英文论文题名：Enhanced CO Oxidation Rate over Embedded Au@Fe_2O_3-Hollow Catalysts
- 论文作者：He Yu ; Kongzhai Li ; Hua Wang ; Yonggang Wei ; Xing Zhu
- 英文论文作者：He Yu ; Kongzhai Li ; Hua Wang ; Yonggang Wei ; Xing Zhu ; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization ; Kunming University of Science and Technology ; Faculty of Chemical Engineering ; Kunming University of Science and Technology ; Faculty of Metallurgy and Energy Engineering ; Kunming University of Science and Technology
- 年：2015
- 作者机构：State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology;Faculty of Chemical Engineering, Kunming University of Science and Technology;Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology;
- 英文论文关键词：CO oxidation ; gold nanoparticles ; Fe_2O_3-hollow ; Au@Fe_2O_3 ; interface
- 会议召开时间：2015-11-20
- 会议录名称：第九届全国环境催化与环境材料学术会议——助力两型社会快速发展的环境催化与环境材料会议论文集（NCECM 2015）
- 语种：英文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：第九届全国环境催化与环境材料学术会议——助力两型社会快速发展的环境催化与环境材料
- 会议地点：中国湖南长沙
- 主办单位：中国化学会催化委员会
- 学会名称：中国化学会
- 页数：1
- 文件大小：414k
- 原文格式：D
- 会议级别：全国
摘要
Gold nanoparticles supported on iron oxides are highly active catalysts for the oxidation of CO even at low temperature [1,2]. In the present work, a series of Au@Fe_2O_3-hollow catalysts with different hollow sizes(10-25 nm) were obtained via a novel synthetic strategy. Au/β-FeOOH-rods and Au/β-FeOOH-cubes prepared by hydrothermal processes were used as precursors, and the different hollow structural features of Au@Fe_2O_3 catalysts were synthesized by controlling the sizes of the FeOOH rods or cube and the calcination conditions. Characterization techniques, such as X-ray diffraction(XRD), transmission electron microscopic(TEM), thermogravimetry differential scanning calorimeter(TG–DSC), X-ray photoelectron spectroscopy(XPS), H_2 or CO temperature programmed reduction(H_2/CO-TPR), CO_2 temperature programmed desorption(CO_2-TPD) and In-situ Fourier transformed infrared(FTIR) spectroscopy were employed to investigate the structure, surface morphology and physical-chemical properties of the catalysts. The structural susceptibility of Au@Fe_2O_3 catalysts for CO oxidation was investigated in detail. The sample with a metal loading of 1 wt % shows good activity, which is much better than the Au/Fe_2O_3-bulk prepared by colloidal deposition with more gold loadings(e.g., 3%). This should be attributed to abundant interface between the Au particles and Fe_2O_3 in the hollow structure. The catalytic activity of the Au@Fe_2O_3 was also affected by the hollow size.
Gold nanoparticles supported on iron oxides are highly active catalysts for the oxidation of CO even at low temperature [1,2]. In the present work, a series of Au@Fe_2O_3-hollow catalysts with different hollow sizes(10-25 nm) were obtained via a novel synthetic strategy. Au/β-FeOOH-rods and Au/β-FeOOH-cubes prepared by hydrothermal processes were used as precursors, and the different hollow structural features of Au@Fe_2O_3 catalysts were synthesized by controlling the sizes of the FeOOH rods or cube and the calcination conditions. Characterization techniques, such as X-ray diffraction(XRD), transmission electron microscopic(TEM), thermogravimetry differential scanning calorimeter(TG–DSC), X-ray photoelectron spectroscopy(XPS), H_2 or CO temperature programmed reduction(H_2/CO-TPR), CO_2 temperature programmed desorption(CO_2-TPD) and In-situ Fourier transformed infrared(FTIR) spectroscopy were employed to investigate the structure, surface morphology and physical-chemical properties of the catalysts. The structural susceptibility of Au@Fe_2O_3 catalysts for CO oxidation was investigated in detail. The sample with a metal loading of 1 wt % shows good activity, which is much better than the Au/Fe_2O_3-bulk prepared by colloidal deposition with more gold loadings(e.g., 3%). This should be attributed to abundant interface between the Au particles and Fe_2O_3 in the hollow structure. The catalytic activity of the Au@Fe_2O_3 was also affected by the hollow size.
Gold nanoparticles supported on iron oxides are highly active catalysts for the oxidation of CO even at low temperature [1,2]. In the present work, a series of Au@Fe_2O_3-hollow catalysts with different hollow sizes(10-25 nm) were obtained via a novel synthetic strategy. Au/β-FeOOH-rods and Au/β-FeOOH-cubes prepared by hydrothermal processes were used as precursors, and the different hollow structural features of Au@Fe_2O_3 catalysts were synthesized by controlling the sizes of the FeOOH rods or cube and the calcination conditions. Characterization techniques, such as X-ray diffraction(XRD), transmission electron microscopic(TEM), thermogravimetry differential scanning calorimeter(TG–DSC), X-ray photoelectron spectroscopy(XPS), H_2 or CO temperature programmed reduction(H_2/CO-TPR), CO_2 temperature programmed desorption(CO_2-TPD) and In-situ Fourier transformed infrared(FTIR) spectroscopy were employed to investigate the structure, surface morphology and physical-chemical properties of the catalysts. The structural susceptibility of Au@Fe_2O_3 catalysts for CO oxidation was investigated in detail. The sample with a metal loading of 1 wt % shows good activity, which is much better than the Au/Fe_2O_3-bulk prepared by colloidal deposition with more gold loadings(e.g., 3%). This should be attributed to abundant interface between the Au particles and Fe_2O_3 in the hollow structure. The catalytic activity of the Au@Fe_2O_3 was also affected by the hollow size.
引文
[1]T.Yan,D.W.Redman,W.Y.Yu,D.W.Flaherty,J.A.Rodriguez,C.B.Mullins,J.Catal.,294(2012).216.
[2]H.F.Yin,Z.Ma,M.F.Chi,S.Dai,Catal.Today,160(2011).87.
[2]H.F.Yin,Z.Ma,M.F.Chi,S.Dai,Catal.Today,160(2011).87.