State of copper ions, bond energy of oxygen and catalytic properties in hydrogen oxidation for a copper-magnesium system

1982 ◽  
Vol 18 (1-2) ◽  
pp. 203-207 ◽  
Author(s):  
L. P. Davydova ◽  
G. K. Boreskov ◽  
V. V. Popovskii ◽  
T. M. Yurieva ◽  
V. F. Anufrienko
Keyword(s):  
Bond Energy ◽  
Catalytic Properties ◽  
Copper Ions ◽  
Hydrogen Oxidation

scholarly journals High crystallinity design of Ir-based catalysts drives catalytic reversibility for water electrolysis and fuel cells

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Woong Hee Lee ◽  
Young-Jin Ko ◽  
Jung Hwan Kim ◽  
Chang Hyuck Choi ◽  
Keun Hwa Chae ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Catalytic Properties ◽  
Hydrogen Oxidation ◽  
Water Electrolysis ◽  
Oxidation Reactions ◽  
Hydrogen Electrode ◽  
Positive Potential ◽  
Nanoparticle Catalysts ◽  
High Crystallinity ◽  
Hydrogen Evolution Reactions

AbstractThe voltage reversal of water electrolyzers and fuel cells induces a large positive potential on the hydrogen electrodes, followed by severe system degradation. Applying a reversible multifunctional electrocatalyst to the hydrogen electrode is a practical solution. Ir exhibits excellent catalytic activity for hydrogen evolution reactions (HER), and hydrogen oxidation reactions (HOR), yet irreversibly converts to amorphous IrOx at potentials > 0.8 V/RHE, which is an excellent catalyst for oxygen evolution reactions (OER), yet a poor HER and HOR catalyst. Harnessing the multifunctional catalytic characteristics of Ir, here we design a unique Ir-based electrocatalyst with high crystallinity for OER, HER, and HOR. Under OER operation, the crystalline nanoparticle generates an atomically-thin IrOx layer, which reversibly transforms into a metallic Ir at more cathodic potentials, restoring high activity for HER and HOR. Our analysis reveals that a metallic Ir subsurface under thin IrOx layer can act as a catalytic substrate for the reduction of Ir ions, creating reversibility. Our work not only uncovers fundamental, uniquely reversible catalytic properties of nanoparticle catalysts, but also offers insights into nanocatalyst design.

Dependence of the catalytic properties of cobalt molybdate in propylene oxidation on the surface reduction and oxygen bond energy

1977 ◽  
Vol 7 (2) ◽  
pp. 187-191 ◽  
Author(s):  
T. V. Andrushkevich ◽  
G. K. Boreskov ◽  
Yu. D. Pankratiev ◽  
G. Ya. Popova ◽  
O. N. Kozmenko ◽  
...  
Keyword(s):  
Bond Energy ◽  
Catalytic Properties ◽  
Propylene Oxidation ◽  
Surface Reduction ◽  
Cobalt Molybdate ◽  
Oxygen Bond

Catalytic properties and electronic structure of copper ions in Cu-ZSM-5

2005 ◽  
Vol 110 (3-4) ◽  
pp. 310-322 ◽  
Author(s):  
Svetlana A. Yashnik ◽  
Zinfer R. Ismagilov ◽  
Vladimir F. Anufrienko
Keyword(s):  
Electronic Structure ◽  
Catalytic Properties ◽  
Copper Ions

Structure and catalytic properties of novel copper isatin Schiff base complexes

2019 ◽  
Vol 43 (1) ◽  
pp. 188-198 ◽  
Author(s):  
Andrey S. Smirnov ◽  
Luísa M. D. R. S. Martins ◽  
Dmitriy N. Nikolaev ◽  
Roman A. Manzhos ◽  
Vlad V. Gurzhiy ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Oxidation Process ◽  
Catalytic Properties ◽  
Copper Ions ◽  
Alcohol Oxidation ◽  
Schiff Base Complexes

Isatin Schiff bases in combination with copper ions act as non-innocent ligands amplifying the alcohol oxidation process.

Catalytic properties of copper chromite ferrites in water gas shift reaction and hydrogen oxidation

2016 ◽  
Vol 57 (2) ◽  
pp. 224-228 ◽  
Author(s):  
T. P. Minyukova ◽  
N. A. Baronskaya ◽  
M. P. Demeshkina ◽  
L. M. Plyasova ◽  
T. M. Yurieva
Keyword(s):  
Catalytic Properties ◽  
Hydrogen Oxidation ◽  
Copper Chromite ◽  
Water Gas Shift ◽  
Water Gas Shift Reaction ◽  
Shift Reaction ◽  
Water Gas
Sign in / Sign up

Export Citation Format

Share Document