Abstract:

In order to improve catalytic combustion performance and thermal stability of Cu-Mn-Ce mixed oxides, a series of Pt-doped Cu-Mn-Ce catalysts were synthesized by the sol-gel method, and characterized by XRD, BET, H2-TPR, Raman.Their catalytic combustion activities of toluene were tested for the catalytic combustion of toluene.The results indicated that there appear many crystalline defects in the structure of Pt-doped catalysts, which would be favorable for increase of surface area and surface oxygen, leading to better oxidation-reduction ability of catalysts.The activity tests showed that addition of Pt can improve significantly catalytic combustion activity and thermal stability of the mixed oxide catalysts.

Key words: FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体" lang=EN-US>PtFONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">掺杂；FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体" lang=EN-US>Cu-Mn-CeFONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">复合氧化物；催化燃烧；甲苯

摘要：

为提高复合氧化物催化剂的催化燃烧性能和热稳定性，采用溶胶-凝胶法制备一系列贵金属Pt改性的Cu-Mn-Ce催化剂，采用XRD、BET、H2-TPR、Raman对催化剂进行了表征，并以甲苯催化燃烧为模型反应考察了催化活性。结果表明，Pt掺杂会导致Cu-Mn-Ce晶相结构中出现较多的缺陷位，并使比表面积和表面氧数量增加，增强了催化剂的氧化-还原能力。活性测试表明，PtFONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体" lang=EN-US>PtFONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">掺杂；FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体" lang=EN-US>Cu-Mn-CeFONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">复合氧化物；催化燃烧；甲苯