共查询到20条相似文献,搜索用时 46 毫秒
1.
《催化学报》2014,(7)
正Chinese Journal of Catalysis is an international journal published monthly by Chinese Chemical Society,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,and Elsevier.The journal publishes original,rigorous,and scholarly contributions in the fields of heterogeneous and homogeneous catalysis in English or in both English and Chinese.The scope of the journal includes: 相似文献
2.
《催化学报》2014,(9)
正Chinese Journal of Catalysis is an international journal published monthly by Chinese Chemical Society,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,and Elsevier.The journal publishes original,rigorous,and scholarly contributions in the fields of heterogeneous and homogeneous catalysis in English or in both English and Chinese.The scope of the journal includes: 相似文献
3.
《催化学报》2014,(12)
正Chinese Journal of Catalysis is an international journal published monthly by Chinese Chemical Society,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,and Elsevier.The journal publishes original,rigorous,and scholarly contributions in the fields of heterogeneous and homogeneous catalysis in English or in both English and Chinese.The scope of the journal includes: 相似文献
4.
《物理化学学报》2010年刊发了89篇与催化相关的文章,其中53篇研究性文章的主题分属于石油加工、催化氧化、催化加氢、生物质转化、光催化、合成气和甲醇转化、理论催化、电催化和环境催化等9个方向.本述评着重介绍了能源转化和利用方面的文章,指出针对我国的可持续发展目标,设计化石能源和可再生能源的廉价、高效、环境友好的催化剂... 相似文献
5.
Dr. Taku Kitanosono Prof. Dr. Shū Kobayashi 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(43):9408-9429
Ever-evolving catalyst advances in synthetic protocols using water as a reaction medium have enriched the understanding of sustainable organic chemistry. Because conventional classification and definitions were ambivalent, it is proposed here that catalytic reactions using water be collectively called to be “in water”, with further classification into seven types. When accelerated in water as heterogeneous mixtures, the reactions can be regarded as following an “on-water” mechanism. The original term “on water” coined by Sharpless is incongruous with catalytic reactions, whereas on-water used in this review covers all the interfaces involving water where chemical reactions are accelerated. As a result of the unconcluded dispute on the antiquated catalyst-free “on water” model, the modified model defines three water layers: water molecules that are oriented to extrude protons toward the oil phase in the inner layer, those enwrapped by a secondary layer, and finally the bulk water layer. In light of the latitudinous outlook on the role of water at the interface, selected examples of reactions, in particular those reported over the past decade, that follow an “on-water” mechanism are reviewed herein. 相似文献
6.
Designed Precursor for the Controlled Synthesis of Highly Active Atomic and Sub‐nanometric Platinum Catalysts on Mesoporous Silica 下载免费PDF全文
Dr. Sudipta De Dr. Maria V. Babak Max J. Hülsey Prof. Dr. Wee Han Ang Prof. Dr. Ning Yan 《化学:亚洲杂志》2018,13(8):1053-1059
The development of new methods to synthesize nanometric metal catalysts has always been an important and prerequisite step in advanced catalysis. Herein, we design a stable nitrogen ligated Pt complex for the straightforward synthesis by carbonization of uniformly sized atomic and sub‐nanometric Pt catalysts supported on mesoporous silica. During the carbonization of the Pt precursor into active Pt species, the nitrogen‐containing ligand directed the decomposition in a controlled fashion to maintain uniform sizes of the Pt species. The nitrogen ligand had a key role to stabilize the single Pt atoms on a weak anchoring support like silica. The Pt catalysts exhibited remarkable activities in the hydrogenation of common organic functional groups with turnover frequencies higher than in previous studies. By a simple post‐synthetic treatment, we could selectively remove the Pt nanoparticles to obtain a mixture of single atoms and nanoclusters, extending the applicability of the present method. 相似文献
7.
Dorina Chambre Maria-Raluca Szabo C. Popescu Cornelia Idiţoiu 《Journal of Thermal Analysis and Calorimetry》2008,94(2):417-420
Using a micro-calorimetrical DSC we have compared the acid-catalyzed inversion of sucrose in homogeneous and heterogeneous
systems. Acetic acid was chosen as catalyst for homogeneous system, and several carboxylic cationites were used as heterogeneous
catalysts. The kinetic apparent parameters (A, E, k
ap) for all the systems were calculated from DSC data with Friedmann’s method and catalytic constant, k323cat, was further inferred. We found that the specific catalyst efficiency, q
cat, in heterogeneous system is over 5000 times higher than in case of homogeneous ones. The activity of heterogeneous carboxylic
systems is still about 30 times larger than those of a strong mineral acid in homogeneous catalysis.
The results indicate the high efficiency of heterogeneous systems for soft acid catalysis of the sucrose hydrolysis. 相似文献
8.
9.
Andrea Ambrosi Prof. Dr. Scott E. Denmark 《Angewandte Chemie (International ed. in English)》2016,55(40):12164-12189
Since its original discovery over a century ago, the water‐gas shift reaction (WGSR) has played a crucial role in industrial chemistry, providing a source of H2 to feed fundamental industrial transformations such as the Haber–Bosch synthesis of ammonia. Although the production of hydrogen remains nowadays the major application of the WGSR, the advent of homogeneous catalysis in the 1970s marked the beginning of a synergy between WGSR and organic chemistry. Thus, the reducing power provided by the CO/H2O couple has been exploited in the synthesis of fine chemicals; not only hydrogenation‐type reactions, but also catalytic processes that require a reductive step for the turnover of the catalytic cycle. Despite the potential and unique features of the WGSR, its applications in organic synthesis remain largely underdeveloped. The topic will be critically reviewed herein, with the expectation that an increased awareness may stimulate new, creative work in the area. 相似文献
10.
11.
12.
13.
14.
15.
16.
17.
Rafael Luque Zeid A. ALOthman Alina M. Balu Leonid Voskressensky 《Molecules (Basel, Switzerland)》2021,26(21)
A perspective on the use of heterogeneous catalysis to drive the waste-to-pharma concept is provided in this contribution based on the conversion of furanics to active pharmaceutical ingredients (APIs). The provided overview of the concept in this perspective article has been exemplified for two key molecule examples: Ancarolol and Furosemide. 相似文献
18.
19.
20.
Dr. Ceri Hammond Dr. Robert L. Jenkins Dr. Nikolaos Dimitratos Dr. Jose Antonio Lopez‐Sanchez Dr. Mohd Hasbi ab Rahim Dr. Michael M. Forde Adam Thetford Dr. Damien M. Murphy Dr. Henk Hagen Dr. Eric E. Stangland Prof. Jacob M. Moulijn Dr. Stuart H. Taylor Dr. David J. Willock Prof. Graham J. Hutchings 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(49):15735-15745
The partial oxidation of methane to methanol presents one of the most challenging targets in catalysis. Although this is the focus of much research, until recently, approaches had proceeded at low catalytic rates (<10 h?1), not resulted in a closed catalytic cycle, or were unable to produce methanol with a reasonable selectivity. Recent research has demonstrated, however, that a system composed of an iron‐ and copper‐containing zeolite is able to catalytically convert methane to methanol with turnover frequencies (TOFs) of over 14 000 h?1 by using H2O2 as terminal oxidant. However, the precise roles of the catalyst and the full mechanistic cycle remain unclear. We hereby report a systematic study of the kinetic parameters and mechanistic features of the process, and present a reaction network consisting of the activation of methane, the formation of an activated hydroperoxy species, and the by‐production of hydroxyl radicals. The catalytic system in question results in a low‐energy methane activation route, and allows selective C1‐oxidation to proceed under intrinsically mild reaction conditions. 相似文献