Investigation of Cu- and Fe-Doped CsH3PMo11VO40 Heteropoly Compounds for the Selective Oxidation of Methacrolein to Methacrylic Acid
Investigation of Cu- and Fe-Doped CsH3PMo11VO40 Heteropoly Compounds for the Selective Oxidation of Methacrolein to Methacrylic Acid
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Cu 和 Fe 掺杂 CsH3PMo11VO40 杂多化合物用于异丁烯醛选择性氧化成甲基丙烯酸的研究
DOI：
10.1021/ie3032718
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发表时间：
2013-03
期刊：
影响因子：
--
通讯作者：
Suojiang Zhang
中科院分区：
文献类型：
--
作者：
Li Yang;Yanyan Diao;Lei Wang;Suojiang Zhang
研究了铜、铁掺杂的钒磷酸铯盐催化剂对甲基丙烯醛选择氧化制甲基丙烯酸的催化性能。考察了制备条件对催化剂结构和催化性能的影响。结果表明，前驱体中NH 4+的加入方式对焙烧后催化剂的结构有很大影响。以MoO 3、V2 O 5和H3 PO 4为原料制备母体杂多酸，再与混合金属硝酸盐反应生成Keggin型前驱体，氨水的加入促进了前驱体单相立方二级结构的形成。在360 ℃煅烧12 h后，铵离子完全分解，钒离子部分从Keggin单元中排出。在空气中煅烧的样品中观察到的催化活性较低的MoO 3相在N-2中煅烧的样品中不存在。当用NH 4VO 3代替V2 O 5和氨水制备前驱体时，NH 4表现出较高的热稳定性，焙烧气氛对焙烧后催化剂的物相组成几乎没有影响。Cu和Fe作为反离子可以改善催化剂的氧化还原性能，从而提高催化剂的性能。
Selective oxidation of methacrolein to methacrylic acid was carried out over Cu- and Fe-doped acidic cesium salts of molybdovanadophosphoric acids. The influences of preparation conditions on the structure and catalytic properties of the catalysts were investigated. Results showed that the addition method of NH4+ in the precursors greatly affected the structure of the calcined catalysts. When MoO3, V2O5, and H3PO4 were used to prepare the parent heteropoly acid, which further reacted with the mixed metal nitrates to form the Keggin-type precursor, the addition of ammonia promoted the formation of single-phase cubic secondary structure of the precursor. After being calcined at 360 degrees C for 12 h, ammonium ions totally decomposed, and vanadium ions were partially expelled from the primary Keggin units. The catalytically less active MoO3 phase, observed in the sample calcined in air, did not exist in the sample calcined in N-2. When NH4VO3 was used to replace V2O5 and ammonia to prepare the precursor, the ammonium exhibited higher thermal stability, and the calcination atmosphere had almost no effect on the phase composition of the calcined catalysts. It is also found that Cu and Fe as counterions can improve the redox property and thereby enhance the performance of the catalyst.
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DOI：
10.1016/s0166-9834(00)81550-x
发表时间：
1990-09
期刊：
Applied Catalysis
影响因子：
--
作者：
M. Misono;N. Nojiri
通讯作者：
M. Misono;N. Nojiri
酸度对Cs取代多金属氧酸盐丙烷氧化脱氢催化行为的显着影响
影响因子：
5.5
作者：
Sun, Miao;Wang, Ye;Cao, Chuanjing;Zhang, Qinghong;Wan, Huilin;Zhang, Jizhe
通讯作者：
Zhang, Jizhe
DOI：
10.1039/f19868200263
发表时间：
1986
期刊：
Journal of the Chemical Society, Faraday Transactions
影响因子：
--
作者：
R. Fricke;G. Öhlmann
通讯作者：
R. Fricke;G. Öhlmann
影响因子：
--
作者：
R. Bayer;C. Marchal-Roch;Feng-Xian Liu;A. Tézé;G. Hervé
通讯作者：
R. Bayer;C. Marchal-Roch;Feng-Xian Liu;A. Tézé;G. Hervé
影响因子：
5.3
作者：
Putluru, Siva Sankar Reddy;Mossin, Susanne;Fehrmann, Rasmus
通讯作者：
Fehrmann, Rasmus