Iridium–ruthenium single phase mixed oxides for oxygen evolution: Composition dependence of electrocatalytic activity

2012 ◽  
Vol 70 ◽  
pp. 158-164 ◽  
Author(s):  
Lars-Erik Owe ◽  
Mikhail Tsypkin ◽  
Kia S. Wallwork ◽  
Richard G. Haverkamp ◽  
Svein Sunde
Keyword(s):  
Oxygen Evolution ◽  
Electrocatalytic Activity ◽  
Single Phase ◽  
Composition Dependence ◽  
Mixed Oxides

Morphology controlled surface sulfurized CoMn2O4 microspikes electrocatalyst for water splitting with excellent OER rate for binder-free electrocatalytic oxygen evolution

2021 ◽  
Author(s):  
Ali Bahadur ◽  
Waseem Hussain ◽  
Shahid Iqbal ◽  
Farman Ullah ◽  
Muhammad Shoaib ◽  
...  
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Electrocatalytic Activity ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Binder Free ◽  
Synthesis Routes

Transition metal mixed oxides have drawn extensive interest as oxygen evolution electrocatalysts alternatives to noble metals-based material but generally involve prolonged synthesis routes and limited electrocatalytic activity and stability. Herein...

Ruthenium-Iridium Oxide Films Prepared by MOCVD and their Electrocatalytic Activity for Oxygen Evolution

2005 ◽  
Vol 885 ◽  
Author(s):  
M.Z. Figueroa Torres ◽  
M. Hesiquio Garduño ◽  
E. M. Arce Estrada ◽  
J. R. Vargas García
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Single Phase ◽  
Oxide Films ◽  
Iridium Oxide ◽  
Homogeneous Distribution ◽  
X Ray Diffraction ◽  
Metallic Oxide ◽  
Distribution Of Elements

ABSTRACTRuthenium-iridium oxide films were prepared in an horizontal hot-wall MOCVD apparatus and their electrocatalytic activity was investigated in the oxygen evolution reaction. Metal-acetylacetonates were used as precursors and oxygen as the reactant gas. Appropriate deposition conditions for obtaining bi-metallic oxide films were found to be deposition temperature (Tdep), 673 K and total pressure (Ptot), 133.32 Pa. X-Ray diffraction (XRD), Rietveld refinement and scanning electron microscopy (SEM) results demonstrated that the MOCVD method is a viable alternative to grow RuxIr1−xO2 films consisted of a single-phase with a very homogeneous distribution of elements. The electrocatalytic activity of the RuxIr1−xO2 films was investigated by cyclic voltammetry and anodic polarization curves in a 0.5 M H2SO4 solution at room temperature. The single-phase Ru0.4Ir0.6O2 films showed to be very promising for the oxygen evolution reaction due to a synergistic effect.

Hierarchically porous FeNi3@FeNi layered double hydroxide nanostructures: One-step fast electrodeposition and highly efficient electrocatalytic performances for overall water splitting

2021 ◽  
Author(s):  
Zihao Liu ◽  
Shifeng Li ◽  
Fangfang Wang ◽  
Mingxia Li ◽  
Yonghong Ni
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Hierarchically Porous ◽  
One Step ◽  
Double Hydroxide

FeNi-layered double hydroxide (LDH) is thought to be an excellent electrocatalyst for oxygen evolution reaction (OER), but it always shows extremely poor electrocatalytic activity toward hydrogen evolution reaction (HER) in...

Ce-doped Ni-S nanosheets on Ni foam supported NiMoO4 micropillars: Fast electrodeposition, improved electrocatalytic activity and ultralong durability for oxygen evolution reaction in various electrolytes

2021 ◽  
Author(s):  
Fangfang Wang ◽  
Zihao Liu ◽  
Kuanjian Zhang ◽  
Qingqing Zha ◽  
Yonghong Ni
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Ni Foam

Developing active, durable, and inexpensive electrocatalysts for oxygen evolution reaction (OER) is drawing increased interest. Here, a mild hydrothermal-electrodeposition two-step route is designed for preparation of Ce-doped Ni-S@NiMoO4 micropillars composites...

Variation of Electrocatalytic Activity of Isostructural Oxides Sr2LaFeMnO7 and Sr2LaCoMnO7 for Hydrogen and Oxygen-Evolution Reactions

2021 ◽  
Author(s):  
Chandana C.W. Kananke-Gamage ◽  
Farshid Ramezanipour
Keyword(s):  
Magnetic Properties ◽  
Transition Metal ◽  
Charge Transport ◽  
Oxygen Evolution ◽  
Electrocatalytic Activity ◽  
Electronic Configuration

The effect of the electronic configuration of transition metal on electrocatalytic activity, charge transport, and magnetic properties is demonstrated through investigation of Sr2LaFeMnO7 and Sr2LaCoMnO7. The two compounds are isostructural...

scholarly journals Preparation of Polyaniline Nanofibers And Experimental Study On Their Electrochemical Properties And Conductivity

2021 ◽  
Author(s):  
Uihoa chg
Keyword(s):  
Oxygen Evolution ◽  
Electrocatalytic Activity ◽  
Fiber Length ◽  
Performance Test ◽  
Chemical Oxidation ◽  
Carbon Paper ◽  
Chlorine Evolution ◽  
Polyaniline Nanofibers ◽  
Nano Powder ◽  
Polyaniline Nanofiber

Abstract Among nano polyaniline materials, polyaniline nanofibers are the most important. The low conductivity and poor processability have become the biggest obstacles to the application of polyaniline as a practical material. The excellent characteristics of new polyaniline nanofiber materials can just overcome the shortcomings of Polyaniline in forming and processing. In this study, a new polyaniline nanofiber was prepared by chemical oxidation, its structure was characterized, the mechanism of improving its conductivity was studied, and its superior electrocatalytic activity was evaluated by Electrochemical performance test. The results show that the diameter of polyaniline nanofibers is 20nm ~ 50nm and the fiber length is 2µm ~ 5µm. The structure is uniform and the conductivity can reach 13.5 S/cm. he electrocatalytic activity of polyaniline nanofibers for oxygen evolution and chlorine evolution was systematically tested. It was found that the electrocatalytic activity of polyaniline nanofibers for oxygen evolution was higher than that of polyaniline nanofibers. The electrocatalytic activity of carbon paper electrode prepared by β-PbO2 nano powder is superior to that of traditional chlorine evolution anode Ti/RuO2.

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