نتایج جستجو برای: catalyst characterization

تعداد نتایج: 415808  

Mahmoud Zarei was born in Hamedan, Iran in 1986. He received his B.Sc. in Pure Chemistry (2010) from Islamic Azad University Arak and M.Sc. in Organic Chemistry (2013) at Bu-Ali Sina University, Iran. In addition, He received his Ph.D. in Organic Chemistry (2017) under the supervision of Prof. Mohammad Ali Zolfigol. He is currently working towards his Postdoctoral under the supervision of Prof....

2017
Xuelian Liang Xinping Shi Fanfan Zhang Yuyang Li Hongbin Zhang Youzhu Yuan

H2 production by catalytically ethanol steam reforming (ESR) is an effective and prospective method for the application of fuel cells. However, the catalysts’ desirable activity and stability remains an unprecedented challenge. Herein, a type of Sc2O3-doped Co-ZnO catalyst was developed by a co-precipitation method. The so-constructed Co2Zn1Sc0.3 catalyst exhibited a superb catalytic performanc...

2013
Qinggang He Qing Li Samson Khene Xiaoming Ren Franz E. Loṕez-Suaŕez Dolores Lozano-Castello Agustín Bueno-Loṕez Gang Wu

A new nanocomposite catalyst consisting of high-loading cobalt oxide (CoO) on nitrogen-doped reduced graphene oxide (rGO) for oxygen reduction reaction (ORR) was prepared in this work. Its high activity for the ORR in alkaline electrolyte was determined using the rotating disk electrode technique, and further confirmed in real alkaline membrane fuel cells. A combination of physicochemical chara...

Mahmoud Zarei was born in Hamedan, Iran in 1986. He received his B.Sc. in Pure Chemistry (2010) from Islamic Azad University Arak and M.Sc. in Organic Chemistry (2013) at Bu-Ali Sina University, Iran. In addition, He received his Ph.D. in Organic Chemistry (2017) under the supervision of Prof. Mohammad Ali Zolfigol. He is currently working towards his Postdoctoral under the supervision of Prof....

2014
Yang Yang Katrin Niedermann Chong Han Stephen L. Buchwald

The highly selective palladium-catalyzed Negishi coupling of secondary alkylzinc reagents with heteroaryl halides is described. The development of a series of biarylphosphine ligands has led to the identification of an improved catalyst for the coupling of electron-deficient heterocyclic substrates. Preparation and characterization of oxidative addition complex (L)(Ar)PdBr provided insight into...

2014
Shalini Chaturvedi Pragnesh N Dave

Electron Microscope is popular and powerful techniques used to characterize heterogeneous catalysts. In heterogeneous catalysis, frequently used catalysts are metal particles supported on an oxidic material. The size of the metal particles plays a crucial role for the catalyst efficiency, and the determination of size distribution is one of the main tasks of electron microscopy in catalysis. Th...

Journal: :Chemical communications 2012
Senem Karahan Mehmet Zahmakıran Saim Özkar

A new type of supported rhodium nanoparticles were reproducibly prepared from N(2)H(4)BH(3) reduction of [Rh(μ-Cl)(1,5-cod)](2) without using any solid support and pre-treatment technique. Their characterization shows the formation of well dispersed rhodium(0) nanoparticles within the framework of a polyaminoborane based polymeric support. These new rhodium(0) nanoparticles were found to be the...

2009
Michael J. Corr Kirsty F. Gibson Alan R. Kennedy John A. Murphy

This communication demonstrates the preparation, isolation, and full characterization of superelectrophilic salts based on amidine dications in organic solvent, as their triflate salts. These dications are highly activated toward regiospecific reaction with hydrogen gas under mild conditions in the presence of a metal catalyst (Pd/C), mimicking the behavior of the natural substrate, N(5),N(10)-...

2013
Abdessamad Grirrane Hermenegildo Garcia Eleuterio Álvarez

In the context of palladium-catalyzed guanylation of anilines herein, we have been able to characterize and isolate bis(anilino) and bis(guanidino)Pd(II) complexes using reaction conditions under which stoichiometric amounts of palladium salts are used. Characterization of these palladium complexes strongly supports a mechanistic proposal for the catalytic guanylation of anilines using PdCl2(NC...

Farah Jabeen Fazal Mabood, Jasmin Shah M Rasul Jan Zahid Hussain

Waste Low density polyethylenes (LDPE) represent a source of energy and valuablechemicals, were pyrolysed catalytically in a batch reactor under atmospheric pressure. Calciumcarbide was used as a catalyst to explore its effect on pyrolysis product distribution. The effect oftemperature, amount of catalyst and time on the yields of the pyrolysed products wasinvestigated. The effect of catalyst o...

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