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TiO2 - load Rh MxOy Composite Oxide CatalystsAbstract：As the oil resources drying up, the development of new technical route for synthesis of new type of fuel and chemical raw materials has become the focus of the scientific researchers.Rh catalysts because of their superior CO dissociation and insert the ability, in the process of CO hydrogenation with good ethanol generates activity, The project based on the Rh/TiO2, by doping with help catalysis of transition metal, synthesis of TiO2 - MxOy composite oxide, and load the Rh Rh/TiO2 - MxOy catalyst preparation.Key word: catalysator TiO2 - load Rh MxOyethanol new energy resources1 Introduction:It is well known that supported Rh-based catalysts exhibit excel-lent performances for the synthesis of C2 oxygenates such as ethano land acetaldehyde from hydrogenation of CO. So far, quite ex-tensive research on promoters and supports that contribute to higher activity and selectivity toward formation of C2oxygenates has been reported. For example, appropriate addition of promoters, such as Mn, Li, Fe, Ti, La, Sm, V, etc., could notably increase the activity and se-lectivity toward target products. Previous work on supportshas been concentrated principally on SiO2 due to its high surface area, ample porosity and good stability. On the other hand, it has been reported that Ti as a promoter or as a support bothcould promote the formation of C2oxygenates [6,8,15,16]. However, SiO2–TiO2mixed oxide that may combine the advantages that SiO2 is beneficial to the improvement of CO adsorption for its high surfacearea and TiO2 may boost the formation of C2 oxygenates has not beenreported as support for Rh-based catalyst for the synthesis of C2 oxy-genates until to now, to the best of our knowledge.2 Definition:Catalysator can change the chemical reaction rate of reactant in a chemical reaction (can not only improve can also reduce), and the quality and chemical properties of the itself did not change before and after the chemical reaction substance called catalyst (also known as catalyst.3 History:The synthesis of ethanol from CO and H2 (called synthesis gas or syngas) hasattracted great attention because syngas can be obtained from biomass, coal, andnatural gas by gasification and/or reforming [1, 2]. The catalysts for the synthesis ofethanol from ngas can be classified into four categories: (a) Rh-based catalysts[3–6], (b) modified methanol synthesis catalysts [7, 8], (c) modified Fisher–Tropschcatalysts [9, 10], and (d) modified Mo-based catalysts [11, 12]. Among various catalysts, Rh-based catalysts have the highest selectivity for C2+Oxygenatedcompounds such as ethanol, acetic acid, and acetaldehyde [1–6]. Although the base metal catalysts have been studied for the substitution of Rh, Rh is still an importantcatalyst for the CO hydrogenation because of the high selectivity for C2+Production of synthesis gas (syngas) through the partial oxida-tion of methane (POM) or catalytic oxy–methane reforming (COMR) is of great interest [1]. Compared with the traditional method of steam reforming, POM has the following advantages:(i) syngas with an H2 /CO ratio of approximatelycan be obtained, ideal for processes such as methanol [2] andFischer–Tropschsynthesis [3], and (ii) the POM process is energetically more favor-able because it is slightly exothermic. Usually, Ni and noble metalssuch as Pt and Rh are used as active components for this reaction [1,4,5].4 Applications:Ethanol is the best alternative to fossil fuels, Through the objective of the research, the establishment of TiO2 - MxOy surface properties - Rh activity center - activation and reaction of CO and H2 performance between the structure-activity relationship, for the development of industrial application prospect of rhodium catalysts and providing a new train of thought Catalyst usually have the effect of change reaction rate but its nature remains the same. Application is very wide. such as how to control active center of CO dissociation, CO insertion, and activation of hydrogen, maximize Rh center unique advantages are still is the key to the development of the catalyst[6].By adjusting the content and preparationconditions of M metal, a modulated carrier surface properties, optimize the structure and properties of Rh active center, improve the catalyst reaction activity and selectivity of ethanol.5 References:[1] B.C. Enger, R. Lodeng, A. Holmen, Appl. Catal. A 346 (2008) 1.[2] Bhasin M M, O′Connor G L. Belgian Patent: 824822, 1975.[3] Chen G C, Guo C, Zhang X H, Huang Z J, Yuan G Q, Fuel Process. Tech., 2011,92: 456.[4] G.P. Van Der Laan, A. Beenackers, Catal. Rev. 41 (1999) 255.[5] Guglielminotti E, Pinna F, Rigoni M, Strukul G, Zanderighi L, J. Mol. Catal. A:Chem., 1995, 103: 105.[6] Gogate M R, Davis R J, Catal. Commun., 2010, 11: 901.[7]Han, Dongsen Mao ⁎ , Jun Yu, Qiangsheng Guo, Guanzhong Lujournal homepage: /locate/catcom[8] Ichikawa M, Chem. Tech., 1982, 12: 674.[9] T.V. Choudhary, V.R. Choudhary, Angew. Chem. Int. Ed. 47 (2008) 1828.[10] P. Tijm, F. Waller, D. Brown, Appl. Catal. A 221 (2001) 275.[11] P. Prieto, A. Ferreira, P. Haddad, D. Zanchet, J. Bueno, J. Catal. 276 (2010) 351–359.[12] K. Takehira, T. Shishido, P. Wang, T. Kosaka, K. Takaki, J. Catal. 221 (2004) 43.[13] T.V. Choudhary, V.R. Choudhary, Angew. Chem. Int. Ed. 47 (2008) 1828.[14] Yu J, Mao D S, Lu G Z, Guo Q S, Han L P, Catal. Commun., 2012, 27: 1.[15] Yu J, Mao D S, Lu G Z, Guo Q S, Han L P, Fuel Process. Tech., 2013, 112: 100.[16] Yu J, Mao D S, Lu G Z, Guo Q S, Han L P, J. Ind. Eng. Chem., 2013, 19: 806.[17] Wang J J, Zhang Q H, Wang Y, Catal. Today, 2011, 171: 257.。
