نتایج جستجو برای: synergistic catalytic effect

تعداد نتایج: 1733227  

2017
Lanchun Zhang Chuancheng Jia Shuren He Youtao Zhu Yana Wang Zhenhuan Zhao Xiaochun Gao Xiaomei Zhang Yuanhua Sang Dongju Zhang Xiaohong Xu Hong Liu

Hot holes in Pt-Cu alloy clusters can act as catalyst to accelerate the intrinsic aerobic oxidation reactions. It is described that under visible light irradiation the synergistic alcohol catalytic oxidation on Pt-Cu alloy clusters (≈1.1 nm)/TiO2 nanobelts could be significant promoted by interband-excitation-generated long-lifetime hot holes in the clusters.

Journal: :Journal of the American Chemical Society 2012
Eduardas Skucas David W C MacMillan

The enantioselective α-vinylation of aldehydes using vinyl iodonium triflate salts has been accomplished via the synergistic combination of copper and chiral amine catalysis. These mild catalytic conditions provide a direct route for the enantioselective construction of enolizable α-formyl vinylic stereocenters without racemization or olefin transposition. These high-value coupling adducts are ...

2007
Donald O. Rudin

Today's multiple food manipulations may interact to produce a wide-spread difficult-toidentify synergistic malnutrition presenting as a highly idiosyncratic substrate-cat alystantinutrient vitamin-resistant Hoffer-type pellagra-beriberi mainly afflicting primates and accounting for the medically dominant modernization disease syndrome as a variant of the classical catalytic B vitamin-sensitive ...

Journal: :Journal of Cluster Science 2022

Here in, synthesis of Fe2(MoO4)3/reduced graphene oxide (RGO) nanocomposite was prepared by simple hydrothermal approach and used as high efficient dye sensitized solar cells (DSSCs). The decoration RGO into the Fe2(MoO4)3 proved various physic-chemical studies such XRD, SEM, TEM, Raman, UV, PL BET analysis. individual spherical shaped nanoparticles with sizes in range 25–35 nm uniformly decora...

Journal: :Chemical communications 2014
Angèle Monney Enrico Barsch Peter Sponholz Henrik Junge Ralf Ludwig Matthias Beller

A bi-catalytic system, in which Ru-MACHO-BH and Ru(H)2(dppe)2 interact in a synergistic manner, was developed for the base-free dehydrogenation of methanol. A total TON > 4200 was obtained with only trace amounts of CO contamination (<8 ppm) in the produced gas.

Journal: :Chemical communications 2015
Junhyeok Seo Ryan T Pekarek Michael J Rose

We demonstrate the covalent attachment and catalytic function of a nickel-phosphine H2 evolution catalyst to a p-Si(111) photoelectrode. The covalently assembled semiconductor|molecular construct achieves a synergistic improvement (ΔVonset = +200 mV) as compared to a solution of [(PNP)2Ni](2+) in contact with a p-Si(111)-CH3 photoelectrode.

2017
Jing Yuan Li Liu Rong-Rong Guo Sheng Zeng Huan Wang

A simple, inexpensive, and novel method was used to prepare electrocatalysts from Cu supported on titanium dioxide (Cu/TiO2). XRD, SEM, and TEM characterizations confirmed different loadings of Cu nanoparticles (NPs) on TiO2. Cyclic voltammetry tests indicated that Cu/TiO2 exhibited lower overpotential for CO2 reduction than that of Cu NPs. Moreover, 40 wt % Cu/TiO2 exhibited the highest farada...

Journal: :Journal of Cancer 2015
Weimin Kong Nenan Lv Weiya Z Wysham Dario R Roque Tongqing Zhang Simeng Jiao Dan Song Jiao Chen Victoria L Bae-Jump Chunxiao Zhou

Telomerase activity and expression of the catalytic protein hTERT are associated with cell proliferation and advanced stage in endometrial cancer. Our objective was to evaluate the effect of inhibition of hTERT by siRNA and BIBR1532 on cell growth, apoptosis and invasion in endometrial cancer cells. Knockdown of hTERT or treatment of the cells with BIBR1532 decreased telomerase activity, inhibi...

Journal: :Physical chemistry chemical physics : PCCP 2013
Jose Tharun George Mathai Roshith Roshan Amal Cherian Kathalikkattil Kim Bomi Dae-Won Park

Microwave-assisted quaternization of glycine (GLY) resulted in the synthesis of an efficient catalyst, quaternized glycine (QGLY), for the solventless synthesis of cyclic carbonates from epoxides and CO2 under mild reaction conditions. Density functional theory was used to simulate the synergistic influence of the COOH group and the halide ion of QGLY in enhancing the catalytic activity.

Journal: :Chemical communications 2014
Changlong Xiao Xunyu Lu Chuan Zhao

Fe and Ni doped mesoporous Co3O4 (mCo3O4) catalysts were prepared and investigated for electrochemical oxygen evolution. The incorporation of Fe into mCo3O4 (Fe-mCo3O4) results in unusual synergistic effects via destruction of the bulk mesoporous structure and formation of slit-like pores. The Fe-mCo3O4 composite displayed a significantly enhanced catalytic activity for oxygen evolution.

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