Impact of Aliovalent/Isovalent Ions (Gd, Zr, Pr, and Tb) on the Catalytic Stability of Mesoporous Ceria in the HCl Oxidation Reaction

2020 ◽  
Vol 3 (8) ◽  
pp. 7406-7419
Author(s):  
Pascal Cop ◽  
Ruben Maile ◽  
Yu Sun ◽  
Omeir Khalid ◽  
Igor Djerdj ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Catalytic Stability

Atomic-layer-deposited SnO2 on Pt/C prevents sintering of Pt nanoparticles and affects the reaction chemistry for the electrocatalytic glycerol oxidation reaction

2020 ◽  
Vol 8 (31) ◽  
pp. 15992-16005
Author(s):  
Daewon Lee ◽  
Youngmin Kim ◽  
Hyunsu Han ◽  
Won Bae Kim ◽  
Hyunju Chang ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Pt Nanoparticles ◽  
Atomic Layer ◽  
Glycerol Oxidation ◽  
Product Selectivity ◽  
Catalytic Stability

Here we demonstrate that atomic-layer-deposited SnO2 on Pt/C enhances the catalytic stability and changes product selectivity for the electrocatalytic glycerol oxidation reaction.

scholarly journals Polyol Synthesis of Ag/BN Nanohybrids and their Catalytic Stability in CO Oxidation Reaction

ChemCatChem ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1691-1698 ◽  
Author(s):  
Anton S. Konopatsky ◽  
Denis V. Leybo ◽  
Konstantin L. Firestein ◽  
Ilya V. Chepkasov ◽  
Zakhar I. Popov ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxidation Reaction ◽  
Polyol Synthesis ◽  
Co Oxidation Reaction ◽  
Catalytic Stability

From monometallic Au nanowires to trimetallic AuPtRh nanowires: interface control for the formic acid electrooxidation

2018 ◽  
Vol 6 (35) ◽  
pp. 17164-17170 ◽  
Author(s):  
Fumin Li ◽  
Yu Ding ◽  
Xue Xiao ◽  
Shibin Yin ◽  
Mancheng Hu ◽  
...  
Keyword(s):  
Formic Acid ◽  
Oxidation Reaction ◽  
Specific Activity ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Interface Control ◽  
Catalytic Stability ◽  
Mass Activity ◽  
Au Nanowires ◽  
Formic Acid Oxidation Reaction

Trimetallic AuPtRh nanowires with advanced Au/Pt/Rh interface exhibit excellent mass activity (8.05 A mgPt−1), specific activity (14.3 mA cm−2), and catalytic stability for the formic acid oxidation reaction.

Scanning Electron Microscope Study of Bacteria on Mineral Surfaces

1976 ◽  
Vol 34 ◽  
pp. 130-131
Author(s):  
V.K. Berry
Keyword(s):  
Oxidation Reaction ◽  
Electron Microscope Study ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans ◽  
Physical Contact ◽  
Metal Sulfides ◽  
Low Grade ◽  
Mineral Surfaces ◽  
Mineral Surface ◽  
Scanning Electron Microscope Study

There are two strains of bacteria viz. Thiobacillus thiooxidansand Thiobacillus ferrooxidanswidely mentioned to play an important role in the leaching process of low-grade ores. Another strain used in this study is a thermophile and is designated Caldariella .These microorganisms are acidophilic chemosynthetic aerobic autotrophs and are capable of oxidizing many metal sulfides and elemental sulfur to sulfates and Fe2+ to Fe3+. The necessity of physical contact or attachment by bacteria to mineral surfaces during oxidation reaction has not been fairly established so far. Temple and Koehler reported that during oxidation of marcasite T. thiooxidanswere found concentrated on mineral surface. Schaeffer, et al. demonstrated that physical contact or attachment is essential for oxidation of sulfur.

NANOELECTROCATALYSTS BASED PALLADIUM FOR FUEL CELLS WITH DIRECT OXIDATION OF FORMIC ACID

2019 ◽  
Vol 6 (3) ◽  
pp. 104-107
Author(s):  
Marina Vladimirovna Lebedeva ◽  
Alexey Petrovich Antropov ◽  
Alexander Victorovich Ragutkin ◽  
Nicolay Andreevich Yashtulov
Keyword(s):  
Formic Acid ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Electrode Materials ◽  
Formic Acid Oxidation ◽  
Energy Sources ◽  
Acid Oxidation ◽  
Direct Oxidation ◽  
Atomic Force ◽  
Formic Acid Oxidation Reaction

In paper electrode materials with palladium nanoparticles on polymer matrix substrates for energy sources have been formed. Nanocomposites were investigated by atomic force and scanning electron microscopy. The catalytic activity of formed electrodes in the formic acid oxidation reaction was evaluated by voltammetry method.

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

Catalytic stability of othro-chloronitrobenzene hydrogenation on Ru-Fe/C catalyst

2014 ◽  
Vol 34 (2) ◽  
pp. 391-396
Author(s):  
Xiangsheng XU ◽  
Ao’ang CHEN ◽  
Li ZHOU ◽  
Xiaoqing LI ◽  
Huizi GU ◽  
...  
Keyword(s):  
Catalytic Stability

The Synthesis of New Selenium-containing Heterocycles by the Oxidation Reaction of 2,4-Diaryltetrahydro-4H-selenochromenes

2020 ◽  
Vol 24 (15) ◽  
pp. 1663-1668
Author(s):  
Dmitriy Yurievich Direnko ◽  
Boris Ivanovich Drevko ◽  
Yaroslav Borisovich Drevko
Keyword(s):  
Nucleophilic Substitution ◽  
Chlorine Atom ◽  
Oxidation Reaction ◽  
Heterocyclic Fragment ◽  
Oxidative Aromatization

We have explored the reactions of tetrahydro-4H-selenochromenes in the presence of phosphoric pentachloride, and synthesized new condensate aroylbenzoselenophenes. During the reactions, tetrahydro-4H-selenochromenes with phosphoric pentachloride underwent oxidative aromatization and nucleophilic substitution for a chlorine atom of one of the protons in the alicyclic fragment. Also, the narrowing of the heterocyclic fragment occurred as in synthesized selenium-containing compounds earlier transformed into the corresponding condensate aroylbenzoselenophenes.

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