Correlating the Local Electrocatalytic Activity of Amorphous Molybdenum Sulfide Thin Films with Microscopic Composition, Structure, and Porosity

2020 ◽  
Vol 12 (39) ◽  
pp. 44307-44316
Author(s):  
Cameron L. Bentley ◽  
Roland Agoston ◽  
Binglin Tao ◽  
Marc Walker ◽  
Xiangdong Xu ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrocatalytic Activity ◽  
Molybdenum Sulfide ◽  
Composition Structure

High textured AlN thin films grown by RF magnetron sputtering; composition, structure, morphology and hardness

Vacuum ◽  
2004 ◽  
Vol 75 (4) ◽  
pp. 331-338 ◽  
Author(s):  
I.C Oliveira ◽  
K.G Grigorov ◽  
H.S Maciel ◽  
M Massi ◽  
C Otani
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Rf Magnetron Sputtering ◽  
Structure Morphology ◽  
Composition Structure

scholarly journals Electrodeposition of Iridium-Nickel Thin Films on Copper Foam: Effects of Loading and Solution Temperature on HER Performance of Electrocatalyst in Alkaline Water

2020 ◽  
Author(s):  
Jianwen Liu ◽  
Wangping Wu ◽  
Xiang Wang
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Hydrogen Evolution ◽  
Electrocatalytic Activity ◽  
Electrochemical Impedance ◽  
Low Cost ◽  
Solution Temperature ◽  
High Deposition Rate ◽  
Hydrogen Energy ◽  
Copper Foam

Developing novel hydrogen evolution reaction (HER) catalysts with high activity, high stability and low cost is of great importance for the applications of hydrogen energy. In this work, iridium-nickel (Ir-Ni) thin films were electrodeposited on a copper foam as electrocatalyst for HER, and electrodeposition mechanism of Ir-Ni film was studied. The morphology and chemical composition of thin films were determined by scanning electron microscopy and energy-dispersive spectroscopy, respectively. The electrocatalytic performances of the films were estimated by linear sweep voltammograms, electrochemical impedance spectroscopy and cyclic voltammetry. The results show that Ir-Ni thin films were attached to the substrate of porous structure and hollow topography. The deposition of Ni was preferable in the electrolyte without the addition of additives, and Ir-Ni thin film was alloyed, resulting in high deposition rate for Ir42Ni58 thin film, and subsequently an increase of Ir content in the thin films of Ir80Ni20 and Ir88Ni12. Ir-Ni thin films with Tafel slopes of 40-49 mV·dec-1 exhibited highly efficient electrocatalytic activity for HER. The electrocatalytic activity of Ir-Ni thin films showed a loading dependence. As the solution temperature raised from 20 oC to 60 oC, the hydrogen evolution performance of Ir-Ni thin films improved. The apparent activation energy value of Ir88Ni12 film was 7.1 kJ·mol-1. Long-term hydrogen evolution tests exhibited excellent electrocatalystic stability in alkaline solution.

Structure, Electrical and Magnetic Properties of Thin Films of La1−xMxMnO3 on Si

1999 ◽  
Vol 562 ◽  
Author(s):  
N. N. Mateeva ◽  
P. C. Hogan ◽  
K. H. Dahmen
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Transition Temperature ◽  
Buffer Layers ◽  
Ferromagnetic Transition ◽  
Electrical And Magnetic Properties ◽  
Insulator Metal Transition ◽  
Composition Structure

ABSTRACTThin films of lanthanum manganates doped with Ca2+, Sr2+, Ba2+ and Pb2+ have been deposited on Si(100) substrate and their electrical and magnetic properties were discussed with respect to the composition, structure and nature of the dopant. Buffer layers of YSZ and La0.8Al0.2O3 were employed and their effect on the materials was studied. Interesting magnetotransport properties were found in some of the films, where there is a large difference between the insulator-metal transition temperature and a ferromagnetic transition temperature.

Optimal Preparation and Characterization of Sputtered Y2O3 Films on Sapphire Substrates

2014 ◽  
Vol 602-603 ◽  
pp. 266-269 ◽  
Author(s):  
Gui Gen Wang ◽  
Hong Liang Qian ◽  
Qing Tao Li ◽  
Guo Shuang Qin ◽  
Lin Luo
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Deposition Velocity ◽  
Rf Power ◽  
Sapphire Substrates ◽  
Elastic Module ◽  
Preparation Conditions ◽  
Composition Structure ◽  
Sputtering Pressure

Normal 0 7.8 磅 0 2 false false false MicrosoftInternetExplorer4 It is necessary to prepare compressive films on sapphire window for preventing its high-temperature failure. In this study, the yttrium oxide (Y2O3) thin films were deposited on the sapphire substrates by RF reactive magnetron sputtering with varying sputtering pressure. The as-deposited Y2O3films were also annealed. The composition, structure, refractive index and mechanical properties of the films were systematically analyzed by XPS, XRD, ellipsometry and nanoindention method, respectively. The influences of sputtering pressure on the deposition velocity and the refractive index were investigated. It can obtain desirable Y2O3thin films for the preparation conditions (sputtering pressure: 10Pa, substrate temperature: 500°C, RF power: 200W) after annealing in O2at 500°C for 1h. The refractive index and hardness both have the maximum value (1.8337 and 3.98 GPa), respectively. The elastic module has the minimum value (109.24 GPa). It is promising for the Y2O3film as the underlayer of protective coating of sapphire windows. <object classid="clsid:38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui> st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:普通表格; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0pt 5.4pt 0pt 5.4pt; mso-para-margin:0pt; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}

Effect of annealing on composition, structure and optical properties of SrHfON thin films

2012 ◽  
Vol 258 (24) ◽  
pp. 9706-9710 ◽  
Author(s):  
Li-ping Feng ◽  
Yin-quan Wang ◽  
Hao Tian ◽  
Zheng-tang Liu
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Composition Structure

Composition, Structure, Morphology of thin Films Produced by Hydrochemical Deposition in PbSe-CdSe System

2015 ◽  
Vol 3 (1) ◽  
pp. 56-68
Author(s):  
Nina V. Zarubina ◽  
◽  
Ivan V. Zarubin ◽  
Larisa N. Maskaeva ◽  
Vyacheslav F. Markov
Keyword(s):  
Thin Films ◽  
Hydrochemical Deposition ◽  
Structure Morphology ◽  
Composition Structure

The Influence of Deposition Conditions on the Properties of a-Sic:H Thin Films

1990 ◽  
Vol 192 ◽  
Author(s):  
L. Magafas ◽  
D. Girginoudi ◽  
N. Georgoulas ◽  
A. Thanailakis
Keyword(s):  
Thin Films ◽  
Chemical Composition ◽  
Optical Absorption ◽  
Flow Rate ◽  
Growth Conditions ◽  
Optical Absorption Coefficient ◽  
Hydrogen Flow Rate ◽  
Hydrogen Flow ◽  
Composition Structure ◽  
Deposition Conditions

ABSTRACTThe dependence of chemical composition, structure and optoelectronic properties of sputtered a-SiC:H thin films on substrate temperature, Ts, and hydrogen flow rate has been studied. The films are amorphous for the growth conditions used in this work. The chemical composition of the alloys is very little influenced by the Ts, whereas the hydrogen content and the optical absorption coefficient depends strongly on Ts and hydrogen flow rate.

Synthesis, characterization and electrocatalytic activity of SnO2, Pt–SnO2 thin films for methanol oxidation

2014 ◽  
Vol 439 ◽  
pp. 44-48 ◽  
Author(s):  
Sumanta Jana ◽  
Gopinath Mondal ◽  
Bibhas Chandra Mitra ◽  
Pulakesh Bera ◽  
Anup Mondal
Keyword(s):  
Thin Films ◽  
Methanol Oxidation ◽  
Electrocatalytic Activity ◽  
Sno2 Thin Films
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