CO2 reduction on Pt(S) -[n( 111) × ( 111)] single crystal electrodes affected by the adsorption of sulfuric acid anion

1996 ◽  
Vol 416 (1-2) ◽  
pp. 61-65 ◽  
Author(s):  
Nagahiro Hoshi ◽  
Toshitake Suzuki ◽  
Yoshio Hori
Keyword(s):  
Sulfuric Acid ◽  
Single Crystal ◽  
Co2 Reduction ◽  
Acid Anion

scholarly journals Comparisons of formic acid oxidation at supported Pt catalyst and at low-index Pt single crystal electrodes in sulfuric acid solution

2003 ◽  
Vol 68 (11) ◽  
pp. 849-857 ◽  
Author(s):  
Amalija Tripkovic ◽  
Ksenija Popovic ◽  
Jelena Lovic
Keyword(s):  
Sulfuric Acid ◽  
Formic Acid ◽  
Single Crystal ◽  
Particle Diameter ◽  
Supported Catalyst ◽  
Pt Catalyst ◽  
Acid Oxidation ◽  
Potential Region ◽  
The Mean ◽  
Supported Pt Catalyst

The oxidation of formic acid was studied at supported Pt catalyst (47.5 wt%. Pt) and a low-index single crystal electrodes in sulfuric acid. The supported Pt catalyst was characterized by the TEM and HRTEM techniques. The mean Pt particle diameter, calculated from electrochemical measurements fits well with Pt particle size distribution determined by HRTEM. For the mean particle diameter the surface averaged distribution of low-index single crystal facets was established. Comparison of the activities obtained at Pt supported catalyst and low-index Pt single crystal electrodes revealed that Pt(111) plane is the most active in the potential region relevant for fuel cell applications.

The Preparation of 1,2-Bis(2,2′:6′,2′′-Terpyridin-4′yl)Ethanone: The First Example of 4′-Terpyridyls Unsymmetrically Linked by a Functionalized Two-Carbon Chain

2004 ◽  
Vol 57 (7) ◽  
pp. 689 ◽  
Author(s):  
Zhi-Long Chen ◽  
Ronald N. Warrener ◽  
Douglas N. Butler
Keyword(s):  
Sulfuric Acid ◽  
Hydrochloric Acid ◽  
Single Crystal ◽  
Coupling Reaction ◽  
Carbon Chain ◽  
Sodium Cyanide ◽  
Starting Material ◽  
X Ray ◽  
Concentrated Sulfuric Acid ◽  
Single Crystal Analysis

1,2-Bis(2,2′:6′,2′′-terpyridin-4′yl)ethanone 7, an unsymmetrically linked bis-tridentatate ligand, was prepared by treatment of 4′-cyanomethylterpyridine 10 (RT, overnight) or 4′-(methoxycarbonylmethyl)terpyridine 11 (60°C, 7 h) with concentrated hydrochloric acid. These conversions, which involved an unprecedented homo-coupling reaction, are discussed with the structure of 7 being confirmed by X-ray single crystal analysis. The nitrile starting material 10 was prepared by reaction of the mesylate 9, derived from the known 4′-hydroxymethylterpyridine 8 with sodium cyanide, while ester 11 was prepared by reaction of 10 with methanol in the presence of concentrated sulfuric acid.

Structural effects on CO2 reduction at Pt single-crystal electrodes

1994 ◽  
Vol 369 (1-2) ◽  
pp. 183-191 ◽  
Author(s):  
A. Rodes ◽  
E. Pastor ◽  
T. Iwasita
Keyword(s):  
Single Crystal ◽  
Co2 Reduction ◽  
Structural Effects

scholarly journals Formation Mechanism of Strip Defects in Anodizing AA5252 Aluminium Alloy Sheets

2020 ◽  
Vol 326 ◽  
pp. 04003
Author(s):  
Chong Gao ◽  
Zhongyu Jiang ◽  
Zhenshan Liu ◽  
Pizhi Zhao ◽  
Ruiyin Huang ◽  
...  
Keyword(s):  
Surface Layer ◽  
Sulfuric Acid ◽  
Single Crystal ◽  
Aluminium Alloy ◽  
Formation Mechanism ◽  
Grain Orientation ◽  
Surface Brightness ◽  
Aluminium Substrate ◽  
Normal Zone ◽  
Lower Porosity

Processed by sulfuric acid anodizing, several unexpected strip defects exhibited on the anodizing film of AA5252 aluminium alloy sheets. Their formation mechanism was studied in detail. The normal zone and strip zone were compared, with respect to surface brightness, porosity of anodizing film, and microstructures of the corresponding aluminium substrate tested by spectroscopic colorimeter and SEM, and SEM-EBSD. Results showed that the brightness of strip zone was lower than that of normal zone. Additionally, compared with normal zone, the porosity of anodizing film was higher, and cubic grains fewer, which located in the corresponding surface layer of aluminium substrate in strip zone. In order to further clarify the effect of grain orientation on the brightness of anodizing film, single crystal aluminium sheet with (100), (110) or (111) orientation was anodized. Results showed that the anodized (100) oriented specimen, i.e., cubic grain was brighter, whose anodizing film had lower porosity, compared with (110) and (111) oriented ones. Therefore, the formation mechanism of strip defects was proposed as uneven distribution of cubic grains. The zones with fewer cubic orientated grains were darker, and were visible as strip defects after anodizing.

Two Zr−based heterometal−organic frameworks for efficient CO2 reduction under visible light

CrystEngComm ◽  
2021 ◽  
Author(s):  
Ying Wang ◽  
Yao-mei Fu ◽  
Si-qi You ◽  
xuexin Li ◽  
Xinlong Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Co2 Reduction ◽  
X Ray Diffraction ◽  
Transition Metal Cations ◽  
One Pot ◽  
X Ray ◽  
Secondary Building Units

Two new zirconium−based heterometal−organic frameworks, Zr3CP3−Mn (1) and Zr3CP3−Ni (2) constructed from [Cp3Zr3(μ3−O)(μ2−OH)3(IN)3] secondary building units and transition metal cations, were successfully synthesized through one−pot method. Single-crystal X-ray diffraction analysis...

Sign in / Sign up

Export Citation Format

Share Document