scholarly journals Electrical promotion-assisted automotive exhaust catalyst: highly active and selective NO reduction to N2 at low-temperatures

2021 ◽  
Author(s):  
Yuki Omori ◽  
Ayaka Shigemoto ◽  
Kohei Sugihara ◽  
Takuma Higo ◽  
Toru Uenishi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electric Field ◽  
Low Temperatures ◽  
No Reduction ◽  
Automotive Exhaust ◽  
Highly Active ◽  
Automotive Exhaust Catalyst

Low-temperature operation of TWC can be achieved even at 423 K by applying an electric field to the semiconductor catalyst.

scholarly journals Electrical Promotion-Assisted Automotive Exhaust Catalyst: Highly Active and Selective NO Reduction to N2 at Low-Temperatures

2021 ◽  
Author(s):  
Yuki Omori ◽  
Ayaka Shigemoto ◽  
Kohei Sugihara ◽  
Takuma Higo ◽  
Toru Uenishi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Electric Field ◽  
Low Temperatures ◽  
No Reduction ◽  
Lattice Oxygen ◽  
Pd Catalyst ◽  
Highly Active ◽  
Automotive Exhaust Catalyst ◽  
Activated Surface

Pd catalyst (Pd/Ce<sub>0.7</sub>Zr<sub>0.3</sub>O<sub>2</sub>) in an electric field exhibits extremely high three-way catalytic activity (TWC: NO-C<sub>3</sub>H<sub>6</sub>-CO-O<sub>2</sub>-H<sub>2</sub>O). By applying an electric field to the semiconductor catalyst, low-temperature operation of TWC can be achieved even at 473 K by virtue of the activated surface-lattice oxygen.

scholarly journals Electrical Promotion-Assisted Automotive Exhaust Catalyst: Highly Active and Selective NO Reduction to N2 at Low-Temperatures

2021 ◽  
Author(s):  
Yuki Omori ◽  
Ayaka Shigemoto ◽  
Kohei Sugihara ◽  
Takuma Higo ◽  
Toru Uenishi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Electric Field ◽  
Low Temperatures ◽  
No Reduction ◽  
Lattice Oxygen ◽  
Pd Catalyst ◽  
Highly Active ◽  
Automotive Exhaust Catalyst ◽  
Activated Surface

Pd catalyst (Pd/Ce<sub>0.7</sub>Zr<sub>0.3</sub>O<sub>2</sub>) in an electric field exhibits extremely high three-way catalytic activity (TWC: NO-C<sub>3</sub>H<sub>6</sub>-CO-O<sub>2</sub>-H<sub>2</sub>O). By applying an electric field to the semiconductor catalyst, low-temperature operation of TWC can be achieved even at 473 K by virtue of the activated surface-lattice oxygen.

Fabrication of Mn–CeOx/CNTs catalysts by a redox method and their performance in low-temperature NO reduction with NH3

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28385-28388 ◽  
Author(s):  
Yanbing Zhang ◽  
Yuying Zheng ◽  
Xie Wang ◽  
Xiulian Lu
Keyword(s):  
Low Temperature ◽  
Formation Mechanism ◽  
No Reduction ◽  
Highly Active ◽  
Redox Method

Highly active Mn–CeOx/CNTs catalysts were first fabricated by a novel redox method, and a formation mechanism was proposed.

scholarly journals A Cu–Pd single-atom alloy catalyst for highly efficient NO reduction

2019 ◽  
Vol 10 (36) ◽  
pp. 8292-8298 ◽  
Author(s):  
Feilong Xing ◽  
Jaewan Jeon ◽  
Takashi Toyao ◽  
Ken-ichi Shimizu ◽  
Shinya Furukawa
Keyword(s):  
Noble Metal ◽  
Low Temperatures ◽  
No Reduction ◽  
Single Atom ◽  
Minimum Amount ◽  
Highly Efficient ◽  
Highly Active ◽  
Alloy Catalyst ◽  
Single Atom Alloy

Highly active and selective NO reduction was achieved at low temperatures using a minimum amount of noble metal Pd.

scholarly journals Perovskite lattice oxygen contributes to low-temperature catalysis for exhaust gas cleaning

RSC Advances ◽  
2019 ◽  
Vol 9 (39) ◽  
pp. 22721-22728 ◽  
Author(s):  
Takuma Higo ◽  
Kohei Ueno ◽  
Yuki Omori ◽  
Hiroto Tsuchiya ◽  
Shuhei Ogo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Low Temperatures ◽  
No Reduction ◽  
Lattice Oxygen ◽  
Pd Catalyst ◽  
Exhaust Gas ◽  
Pd Catalysts ◽  
Gas Cleaning ◽  
Exhaust Gas Cleaning ◽  
Perovskite Lattice

A Pd catalyst supported on Ba-substituted LaAlO3 perovskite (Pd/La0.9Ba0.1AlO3−δ) has remarkably higher activity than other Pd catalysts at low temperatures (≤573 K) for NO reduction by propylene.

Molybdenum carbide as an efficient catalyst for low-temperature hydrogenation of dimethyl oxalate

2016 ◽  
Vol 52 (28) ◽  
pp. 5030-5032 ◽  
Author(s):  
Yanting Liu ◽  
Jian Ding ◽  
Jiaqiang Sun ◽  
Juan Zhang ◽  
Jicheng Bi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Low Temperatures ◽  
Molybdenum Carbide ◽  
Efficient Catalyst ◽  
Dimethyl Oxalate ◽  
Highly Active ◽  
Stable Catalyst ◽  
Supported Molybdenum Carbide

Silica-supported molybdenum carbide (Mo2C/SiO2) is found to be a highly active, selective and stable catalyst for the hydrogenation of dimethyl oxalate to ethanol at low temperatures (473 K).

In situ Tensile Experiments at Low Temperatures on Niobium Single Crystals by H.V.E.M.

1975 ◽  
Vol 33 ◽  
pp. 58-59
Author(s):  
F. H. Louchet ◽  
L. P. Kubin
Keyword(s):  
Electron Microscope ◽  
Transition Temperature ◽  
Low Temperature ◽  
Slip System ◽  
Low Temperatures ◽  
Tensile Axis ◽  
Image Intensifier ◽  
Screw Dislocations ◽  
Source Operation

Experiments have been carried out on the 3 MeV electron microscope in Toulouse. The low temperature straining holder has been previously described Images given by an image intensifier are recorded on magnetic tape.The microtensile niobium samples are cut in a plane with the two operative slip directions [111] and lying in the foil plane. The tensile axis is near [011].Our results concern:- The transition temperature of niobium near 220 K: at this temperature and below an increasing difference appears between the mobilities of the screw and edge portions of dislocations loops. Source operation and interactions between screw dislocations of different slip system have been recorded.

Pt-Pd Nanoalloy for the Unprecedented Activation of Carbon-Fluorine Bond at Low Temperature

2019 ◽  
Author(s):  
Raghu Nath Dhital ◽  
keigo nomura ◽  
Yoshinori Sato ◽  
Setsiri Haesuwannakij ◽  
Masahiro Ehara ◽  
...  
Keyword(s):  
Activation Energy ◽  
Low Temperature ◽  
Dft Calculations ◽  
Bond Activation ◽  
Mild Conditions ◽  
Selective Transformation ◽  
Rate Determining Step ◽  
Highly Active ◽  
Harsh Conditions ◽  
Reaction Profile

Carbon-Fluorine (C-F) bonds are considered the most inert organic functionality and their selective transformation under mild conditions remains challenging. Herein, we report a highly active Pt-Pd nanoalloy as a robust catalyst for the transformation of C-F bonds into C-H bonds at low temperature, a reaction that often required harsh conditions. The alloying of Pt with Pd is crucial to activate C-F bond. The reaction profile kinetics revealed that the major source of hydrogen in the defluorinated product is the alcoholic proton of 2-propanol, and the rate-determining step is the reduction of the metal upon transfer of the <i>beta</i>-H from 2-propanol. DFT calculations elucidated that the key step is the selective oxidative addition of the O-H bond of 2-propanol to a Pd center prior to C-F bond activation at a Pt site, which crucially reduces the activation energy of the C-F bond. Therefore, both Pt and Pd work independently but synergistically to promote the overall reaction

INVAR M93

Alloy Digest ◽  
2008 ◽  
Vol 57 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Low Temperatures ◽  
Bend Strength ◽  
Temperature Performance ◽  
Ni Content ◽  
Precision Alloys ◽  
Ni Alloy

Abstract Invar is an Fe-Ni alloy with 36% Ni content that exhibits the lowest expansion of known metals from very low temperatures up to approximately 230 deg C (445 deg F). Invar M93 is a cryogenic Invar with improved weldability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear and bend strength as well as fracture toughness and fatigue. It also includes information on low temperature performance as well as forming and joining. Filing Code: FE-143. Producer or source: Metalimphy Precision Alloys.

Sign in / Sign up

Export Citation Format

Share Document