Facile Synthesis of 3 D Platinum Dendrites with a Clean Surface as Highly Stable Electrocatalysts

ChemCatChem ◽  
2014 ◽  
Vol 6 (6) ◽  
pp. 1538-1542 ◽  
Author(s):  
Tian Wu ◽  
Hui Ming Zhou ◽  
Bao Yu Xia ◽  
Peng Xiao ◽  
Ya Yan ◽  
...  
Keyword(s):  
Clean Surface ◽  
Facile Synthesis

scholarly journals Cover Picture: Facile Synthesis of Pd@Pt3- 4L Core-Shell Octahedra with a Clean Surface and Thus Enhanced Activity toward Oxygen Reduction (ChemCatChem 3/2017)

ChemCatChem ◽  
2017 ◽  
Vol 9 (3) ◽  
pp. 374-374
Author(s):  
Shixiong Bao ◽  
Madeline Vara ◽  
Xuan Yang ◽  
Shan Zhou ◽  
Legna Figueroa-Cosme ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Core Shell ◽  
Clean Surface ◽  
Facile Synthesis ◽  
Enhanced Activity

scholarly journals Facile Synthesis of Pd@Pt3- 4L Core-Shell Octahedra with a Clean Surface and Thus Enhanced Activity toward Oxygen Reduction

ChemCatChem ◽  
2017 ◽  
Vol 9 (3) ◽  
pp. 376-376
Author(s):  
Shixiong Bao ◽  
Madeline Vara ◽  
Xuan Yang ◽  
Shan Zhou ◽  
Legna Figueroa-Cosme ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Core Shell ◽  
Clean Surface ◽  
Facile Synthesis ◽  
Enhanced Activity

Facile synthesis of tungsten carbide-cobalt mixtures with clean surface and controllable carbon content

2021 ◽  
pp. 162835
Author(s):  
Qinqi Zhan ◽  
Yanhong Yin ◽  
Ke Zhang ◽  
Peng Deng ◽  
Min Wen ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Carbon Content ◽  
Clean Surface ◽  
Facile Synthesis

Facile Synthesis of Pd@Pt3-4LCore-Shell Octahedra with a Clean Surface and Thus Enhanced Activity toward Oxygen Reduction

ChemCatChem ◽  
2017 ◽  
Vol 9 (3) ◽  
pp. 414-419 ◽  
Author(s):  
Shixiong Bao ◽  
Madeline Vara ◽  
Xuan Yang ◽  
Shan Zhou ◽  
Legna Figueroa-Cosme ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Clean Surface ◽  
Facile Synthesis ◽  
Enhanced Activity

Surface reactions observed by photoemission electron microscopy (PEEM)

1992 ◽  
Vol 50 (1) ◽  
pp. 286-287
Author(s):  
H.H. Rotermund
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Work Function ◽  
Chemical Reactions ◽  
Reaction Diffusion ◽  
Dynamic Processes ◽  
Clean Surface ◽  
Crystal Surfaces ◽  
Single Crystal Surfaces ◽  
Photoemission Electron

Chemical reactions at a surface will in most cases show a measurable influence on the work function of the clean surface. This change of the work function δφ can be used to image the local distributions of the investigated reaction,.if one of the reacting partners is adsorbed at the surface in form of islands of sufficient size (Δ>0.2μm). These can than be visualized via a photoemission electron microscope (PEEM). Changes of φ as low as 2 meV give already a change in the total intensity of a PEEM picture. To achieve reasonable contrast for an image several 10 meV of δφ are needed. Dynamic processes as surface diffusion of CO or O on single crystal surfaces as well as reaction / diffusion fronts have been observed in real time and space.

Rem Study of Current Effect on the Structure of Clean Si(111) Surface

1990 ◽  
Vol 48 (1) ◽  
pp. 306-307
Author(s):  
A. Yamanaka ◽  
H. Ohse ◽  
K. Yagi
Keyword(s):  
The Other ◽  
Current Direction ◽  
Clean Surface ◽  
Current Effect ◽  
Atomic Steps ◽  
Step Bunching ◽  
Terrace Width ◽  
Step Down ◽  
A Current

Recently current effects on clean and metal adsorbate surfaces have attracted much attention not only because of interesting phenomena but also because of practically importance in treatingclean and metal adsorbate surfaces [1-6]. In the former case, metals deposited migrate on the deposit depending on the current direction and a patch of the deposit expands on the clean surface [1]. The migration is closely related to the adsorbate structures and substrate structures including their anisotropy [2,7]. In the latter case, configurations of surface atomic steps depends on the current direction. In the case of Si(001) surface equally spaced array of monatom high steps along the [110] direction produces the 2x1 and 1x2 terraces. However, a relative terrace width of the two domain depends on the current direction; a step-up current widen terraces on which dimers are parallel to the current, while a step-down current widen the other terraces [3]. On (111) surface, a step-down current produces step bunching at temperatures between 1250-1350°C, while a step-up current produces step bunching at temperatures between 1050-1250°C [5].In the present paper, our REM observations on a current induced step bunching, started independently, are described.Our results are summarized as follows.(1) Above around 1000°C a step-up current induces step bunching. The phenomenon reverses around 1200 C; a step-down current induces step bunching. The observations agree with the previous reports [5].

Biotemplated facile synthesis of three‐dimensional micro/nanoporous tin oxide: improving the flammable and mechanical properties of flexible PVC

2019 ◽  
Vol 14 (8) ◽  
pp. 828-830 ◽  
Author(s):  
Weihua Meng ◽  
Weihong Wu ◽  
Weiwei Zhang ◽  
Luyao Cheng ◽  
Yunhong Jiao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tin Oxide ◽  
Three Dimensional ◽  
Facile Synthesis

Selective Degradation of Grindelic Acid and Its 3α-Hydroxy Analog: Facile Synthesis of Grindelistrictic Acids and Potential Intermediates for Erigerol

Synlett ◽  
1991 ◽  
Vol 1991 (09) ◽  
pp. 725-727 ◽  
Author(s):  
Takeshi Shimizu ◽  
Sayoko Hiranuma ◽  
Zhao-hui Qian ◽  
Hirosuke Yoshioka
Keyword(s):  
Facile Synthesis ◽  
Selective Degradation

A FACILE SYNTHESIS AND REACTIONS OF AMINO SELENOLO[2,3-b]PYRIDINE CARBOXYLATE

2015 ◽  
Vol 12 (1) ◽  
pp. 3910-3918 ◽  
Author(s):  
Dr Remon M Zaki ◽  
Prof Adel M. Kamal El-Dean ◽  
Dr Nermin A Marzouk ◽  
Prof Jehan A Micky ◽  
Mrs Rasha H Ahmed
Keyword(s):  
Biological Activity ◽  
Carbonyl Compounds ◽  
Mass Spectra ◽  
The Other ◽  
Pyridine Derivatives ◽  
Facile Synthesis ◽  
High Biological Activity ◽  
Basic Hydrolysis ◽  
Pyridine Carboxylate ◽  
Hydrolysis Of

 Incorporating selenium metal bonded to the pyridine nucleus was achieved by the reaction of selenium metal with 2-chloropyridine carbonitrile 1 in the presence of sodium borohydride as reducing agent. The resulting non isolated selanyl sodium salt was subjected to react with various α-halogenated carbonyl compounds to afford the selenyl pyridine derivatives 3a-f  which compounds 3a-d underwent Thorpe-Ziegler cyclization to give 1-amino-2-substitutedselenolo[2,3-b]pyridine compounds 4a-d, while the other compounds 3e,f failed to be cyclized. Basic hydrolysis of amino selenolo[2,3-b]pyridine carboxylate 4a followed by decarboxylation furnished the corresponding amino selenolopyridine compound 6 which was used as a versatile precursor for synthesis of other heterocyclic compound 7-16. All the newly synthesized compounds were established by elemental and spectral analysis (IR, 1H NMR) in addition to mass spectra for some of them hoping these compounds afforded high biological activity.

S(IV)–Mediated Unsymmetrical Heterocycle Cross-Couplings

2019 ◽  
Author(s):  
Min Zhou ◽  
Jet Tsien ◽  
Tian Qin
Keyword(s):  
Cross Coupling ◽  
Reductive Elimination ◽  
Facile Synthesis ◽  
Trigonal Bipyramidal

<p>Herein we report a sulfur (IV) mediated cross-coupling for facile synthesis of heteroaromatic substrates. Addition of heteroaryl nucleophiles onto a simple, readily-accessible alkyl sulfinyl (IV) chloride allows formation of a trigonal bipyramidal sulfurane intermediate. Reductive elimination therefrom provides bis-heteroaryl products in a practical and efficient fashion. <br></p>

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