scholarly journals Ferromagnetic ligand holes in cobalt perovskite electrocatalysts as an essential factor for high activity towards oxygen evolution

2019 ◽  
Vol 21 (6) ◽  
pp. 2977-2983 ◽  
Author(s):  
Ling Zhang ◽  
Ajin Cheruvathur ◽  
Chiara Biz ◽  
Mauro Fianchini ◽  
Jose Gracia
Keyword(s):  
Catalytic Activity ◽  
Chemical Composition ◽  
High Activity ◽  
Oxygen Evolution ◽  
Magnetic Configuration ◽  
Essential Factor ◽  
Active Materials ◽  
Orbital Physics ◽  
Electro Magnetic ◽  
Definition Of

The definition of the interplay between chemical composition, electro-magnetic configuration and catalytic activity requires a rational study of the orbital physics behind active materials.

scholarly journals Template-free synthesis of mesoporous manganese oxides with catalytic activity in the oxygen evolution reaction

2017 ◽  
Vol 1 (4) ◽  
pp. 780-788 ◽  
Author(s):  
Suoyuan Lian ◽  
Michelle P. Browne ◽  
Carlota Domínguez ◽  
Serban N. Stamatin ◽  
Hugo Nolan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Manganese Oxides ◽  
Template Free ◽  
Highly Porous

Solvothermally synthesised MnCO3 leads to template-free formation of highly porous, defect-rich MnO2 with high activity in water oxidation.

scholarly journals Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers

2015 ◽  
Vol 6 (6) ◽  
pp. 3321-3328 ◽  
Author(s):  
Hyung-Suk Oh ◽  
Hong Nhan Nong ◽  
Tobias Reier ◽  
Manuel Gliech ◽  
Peter Strasser
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Polymer Electrolyte ◽  
Oxygen Evolution ◽  
Tin Oxide ◽  
Oxygen Evolution Reaction ◽  
Polymer Electrolyte Membrane ◽  
Water Electrolysis ◽  
Electrolyte Membrane

Ir nanodendrites (Ir-ND) supported on antimony doped tin oxide (ATO) show enhanced catalytic activity and stability for oxygen evolution reaction (OER) in polymer electrolyte membrane (PEM) water electrolysis.

S Doping Optimized Intermediate Energetics of FeCoOOh for Enhanced Oxygen Evolution Catalytic Activity

2020 ◽  
Author(s):  
Ding Yuan ◽  
Yuhai Dou ◽  
Chun-Ting He ◽  
Linping Yu ◽  
Li Xu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution

scholarly journals Effects of Annealing Temperature on the Oxygen Evolution Reaction Activity of Copper–Cobalt Oxide Nanosheets

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 657
Author(s):  
Geul Han Kim ◽  
Yoo Sei Park ◽  
Juchan Yang ◽  
Myeong Je Jang ◽  
Jaehoon Jeong ◽  
...  
Keyword(s):  
High Activity ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Cobalt Hydroxide ◽  
Ni Foam ◽  
Electron Conduction

Developing high performance, highly stable, and low-cost electrodes for the oxygen evolution reaction (OER) is challenging in water electrolysis technology. However, Ir- and Ru-based OER catalysts with high OER efficiency are difficult to commercialize as precious metal-based catalysts. Therefore, the study of OER catalysts, which are replaced by non-precious metals and have high activity and stability, are necessary. In this study, a copper–cobalt oxide nanosheet (CCO) electrode was synthesized by the electrodeposition of copper–cobalt hydroxide (CCOH) on Ni foam followed by annealing. The CCOH was annealed at various temperatures, and the structure changed to that of CCO at temperatures above 250 °C. In addition, it was observed that the nanosheets agglomerated when annealed at 300 °C. The CCO electrode annealed at 250 °C had a high surface area and efficient electron conduction pathways as a result of the direct growth on the Ni foam. Thus, the prepared CCO electrode exhibited enhanced OER activity (1.6 V at 261 mA/cm2) compared to those of CCOH (1.6 V at 144 mA/cm2), Co3O4 (1.6 V at 39 mA/cm2), and commercial IrO2 (1.6 V at 14 mA/cm2) electrodes. The optimized catalyst also showed high activity and stability under high pH conditions, demonstrating its potential as a low cost, highly efficient OER electrode material.

Research of Thermodynamics and Properties of Pb/WC-Zro2 Inert Electrodes Used in Zinc Electrodeposition

2010 ◽  
Vol 136 ◽  
pp. 43-47
Author(s):  
Rui Dong Xu ◽  
Jun Li Wang ◽  
Jian Feng Zhou
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Metal Matrix ◽  
Stable Region ◽  
Alloy Electrode ◽  
Second Phase ◽  
Acid Solutions ◽  
Zro2 Particle ◽  
Zinc Electrodeposition ◽  
Inert Electrode

This research is to fabricate a Pb/WC-ZrO2 inert electrode used in zinc electrodeposition. First, the potential-pH diagram of Pb-H2O system was constructed and the thermodynamic stable region was calibrated in the diagram. On the basis, the co-deposition of Pb, WC and ZrO2 particles from fluorboric acid solutions was realized on the surface of Pb-4wt%Sb substrate. The results show that deposition amounts of ZrO2 and WC particles in the inert electrodes increase with increasing ZrO2 concentrations in the bath, WC particle is easier to deposit into the inert electrodes than ZrO2 particle. The distribution of WC and ZrO2 particles as the second phase within metal matrix Pb is very uniform. Compared with Pb-1wt%Ag alloy electrode, Pb/9.91wt%WC-3.62wt%ZrO2 inert electrode possesses better catalytic activity of oxygen evolution.

Concomitant Polymorphs: An Alternative to Modulate Oxygen Evolution Performance of Mononuclear Nickel Complex

2021 ◽  
Author(s):  
Chen Hu ◽  
Qing-Qing Huang ◽  
Haibing Xu ◽  
Yuexing Zhang ◽  
Xu Peng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Nickel Complex ◽  
Crystal Packing ◽  
The Relationship

The availability of polymorphs of metallic complexes provides an opportunity to reveal the relationship between crystal packing and catalytic activity. Herein, we immobilize two stable concomitant polymorphs (green NiL2-G and...

Enhanced oxygen evolution catalytic activity of NiS2 by coupling with ferrous phosphite and phosphide

2021 ◽  
Vol 5 (6) ◽  
pp. 1801-1808
Author(s):  
Jie Yu ◽  
Tao Zhang ◽  
Changchang Xing ◽  
Xuejiao Li ◽  
Xinyang Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Tafel Slope ◽  
Low Overpotential

NiS2/Fe-P nanospheres were developed as an efficient oxygen evolution reaction electrocatalyst with a low overpotential (218 mV @ 10 mA cm−2 and 306 mV @ 800 mA cm−2) and Tafel slope (47.5 mV dec−1).

Rutile TiO2 single crystals delivering enhanced photocatalytic oxygen evolution performance

Nanoscale ◽  
2021 ◽  
Author(s):  
Bing Fu ◽  
Zhijiao Wu ◽  
Kai Guo ◽  
Lingyu Piao
Keyword(s):  
Catalytic Activity ◽  
Single Crystals ◽  
Oxygen Evolution ◽  
Water Oxidation ◽  
Charge Separation ◽  
High Surface ◽  
Rutile Tio2 ◽  
Highly Efficient ◽  
Photogenerated Charge Separation

Owing to their scientific and technological importance, the development of highly efficient photocatalytic water oxidation systems with rapid photogenerated charge separation and high surface catalytic activity has highly desirable for...

Facile synthesis of cubical Co3O4 supported Au nanocomposites with high activity for the reduction of 4-nitrophenol to 4-aminophenol

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32430-32433 ◽  
Author(s):  
Yuwen Yang ◽  
Yongyun Mao ◽  
Bin Wang ◽  
Xianwei Meng ◽  
Jiao Han ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Activity ◽  
Impregnation Method ◽  
Facile Synthesis ◽  
Turn Over Frequency ◽  
Turn Over

A facile impregnation method has been successfully applied for synthesis of a cubical Co3O4 supported Au nanocomposites, which leads to the excellent catalytic activity for the reduction of 4-nitrophenol with a high turn over frequency of 9.83 min−1.

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