Oxygen-vacancy- promoted catalytic wet air oxidation of phenol from MnOx-CeO2

Ma Changjian; Wen Yaoyao; Yue Qingqing; Li Anqi; Fu Jile; Zhang Nouwei; Gai Hengjun; Zhenga Jinbao; Chen Bing H.

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Oxygen-vacancy- promoted catalytic wet air oxidation of phenol from MnOx-CeO2

机译：氧空空性 - 促进Mnox-CeO2的苯酚的催化湿空气氧化

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Catalytic oxidation can be effectively promoted by the presence of oxygen vacancies on the catalyst surface. In this study, the effect of oxygen vacancies on the catalytic wet air oxidation (CWAO) of phenol was investigated with CeO2 and MnOx-CeO2 as catalysts. CeO2 and MnOx-CeO2 catalysts with different amounts of oxygen vacancies were obtained via hydrothermal methods and applied for the CWAO of phenol. It was found that CeO2 and MnOx-CeO2 nanorods were much more active than the cubic nanorods. The physicochemical properties of the samples were characterized by TEM, XRD, BET, XPS, and H-2-TPR techniques. The results revealed that the presence of oxygen vacancies in CeO2 and MnOx-CeO2 catalysts could increase the oxidizing ability of the catalysts surface. The addition of Mn could greatly improve the adsorption ability of CeO2 and more efficiently oxidize phenol and its intermediates. The synergy between Mn and Ce could further improve the catalyst redox properties and produce a larger amount of active oxygen species, which is the reason why MnOx-CeO2 nanorods are the most active catalysts among the catalysts investigated in this study.

机译：通过在催化剂表面上存在氧空位，可以有效地促进催化氧化。在这项研究中，用CeO2和Mnox-CeO2作为催化剂研究了氧空位对苯酚催化湿空气氧化（Cwao）的影响。通过水热方法获得具有不同氧空位的CEO2和MNOX-CEO2催化剂，并施用于苯酚的CWAO。发现CEO2和MNOX-CEO2纳米棒比立方纳米棒更有效。通过TEM，XRD，BET，XPS和H-2-TPR技术表征样品的物理化学性质。结果表明，CeO2和MNOX-CeO2催化剂中氧空位的存在可以增加催化剂表面的氧化能力。添加Mn可以大大提高CeO2和更有效地氧化苯酚及其中间体的吸附能力。 Mn和Ce之间的协同作用可以进一步改善催化剂氧化还原性能，并产生较大量的活性氧物质，这是Mnox-CeO2纳米码是本研究中研究的催化剂中最活性催化剂的原因。

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《RSC Advances》 |2017年第43期|共10页
作者
Ma Changjian; Wen Yaoyao; Yue Qingqing; Li Anqi; Fu Jile; Zhang Nouwei; Gai Hengjun; Zhenga Jinbao; Chen Bing H.;
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作者单位

Xiamen Univ Coll Chem &

Chem Engn Natl Engn Lab Green Chem Prod Alcohols Ethers Est Dept Chem &

Biochem Engn Xiamen 361005 Peoples R China;

Xiamen Univ Coll Chem &

Chem Engn Natl Engn Lab Green Chem Prod Alcohols Ethers Est Dept Chem &

Biochem Engn Xiamen 361005 Peoples R China;

Xiamen Univ Coll Chem &

Chem Engn Natl Engn Lab Green Chem Prod Alcohols Ethers Est Dept Chem &

Biochem Engn Xiamen 361005 Peoples R China;

Xiamen Univ Coll Chem &

Chem Engn Natl Engn Lab Green Chem Prod Alcohols Ethers Est Dept Chem &

Biochem Engn Xiamen 361005 Peoples R China;

Xiamen Univ Coll Chem &

Chem Engn Natl Engn Lab Green Chem Prod Alcohols Ethers Est Dept Chem &

Biochem Engn Xiamen 361005 Peoples R China;

Xiamen Univ Coll Chem &

Chem Engn Natl Engn Lab Green Chem Prod Alcohols Ethers Est Dept Chem &

Biochem Engn Xiamen 361005 Peoples R China;

Qingdao Univ Sci &

Technol Qingdao 266042 Shandong Peoples R China;

Xiamen Univ Coll Chem &

Chem Engn Natl Engn Lab Green Chem Prod Alcohols Ethers Est Dept Chem &

Biochem Engn Xiamen 361005 Peoples R China;

Xiamen Univ Coll Chem &

Chem Engn Natl Engn Lab Green Chem Prod Alcohols Ethers Est Dept Chem &

Biochem Engn Xiamen 361005 Peoples R China;

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Oxygen-vacancy- promoted catalytic wet air oxidation of phenol from MnOx-CeO2

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