Effect of Thermal Treatment on the Electronic Conductivity Properties of Cobalt Spinel Phases Synthesized by Electro-Oxidation in Ternary Alkaline Electrolyte (KOH, LiOH, NaOH)

2008 ◽  
Vol 20 (21) ◽  
pp. 6880-6888 ◽  
Author(s):  
Myriam Douin ◽  
Liliane Guerlou-Demourgues ◽  
Michel Ménétrier ◽  
Emilie Bekaert ◽  
Lionel Goubault ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Electronic Conductivity ◽  
Alkaline Electrolyte ◽  
Cobalt Spinel ◽  
Spinel Phases ◽  
Electro Oxidation

Improvement by heating of the electronic conductivity of cobalt spinel phases, electrochemically synthesized in various electrolytes

2009 ◽  
Vol 182 (5) ◽  
pp. 1273-1280 ◽  
Author(s):  
Myriam Douin ◽  
Liliane Guerlou-Demourgues ◽  
Michel Ménétrier ◽  
Emilie Bekaert ◽  
Lionel Goubault ◽  
...  
Keyword(s):  
Electronic Conductivity ◽  
Cobalt Spinel ◽  
Spinel Phases

Conductive bimetal organic framework nanorods decorated with highly dispersed Co3O4 nanoparticles as bi-functional electrocatalyst

2021 ◽  
Author(s):  
Yaxin Duan ◽  
Haitao Liu ◽  
Huabing Zhang ◽  
Shaojie Ke ◽  
Shuaize Wang ◽  
...  
Keyword(s):  
Electrocatalytic Activity ◽  
Electronic Conductivity ◽  
Reduction Reaction ◽  
Alkaline Electrolyte ◽  
Co3o4 Nanoparticles ◽  
Cobalt Ions ◽  
Design And Synthesis ◽  
Half Wave ◽  
Highly Dispersed ◽  
Organic Framework

Abstract The poor electronic conductivity and low intrinsic electrocatalytic activity of metal organic frameworks (MOFs) greatly limit their direct application in electrocatalytic reactions. Herein, we report a conductive two-dimensional π–d conjugated Ni and Co bimetal organic framework (MOF)——NiCo-(2,3,6,7,10,11-hexaiminotriphenylene) (NiCo-HITP) nanorods decorated with highly dispersed Co3O4 nanoparticles (NPs) as a promising bi-functional electrocatalyst towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) through an effective and facile strategy by modifying the rod-shaped Ni3(HITP)2 crystals using cobalt ions. The triggered electrocatalytic activity of the resulting MOF-based materials was achieved by increasing the electrical conductivity (7.23 S cm-1) originated from Ni3(HITP)2 substrate and also by creating the cooperative catalysis sites of Co-Nx and Co3O4 NPs. Optimized syntheses show a promising ORR activity with a high half-wave potential (0.77 V) and also a significantly improved OER activity compared with pure Ni3(HITP)2 in alkaline electrolyte. Furthermore, a rechargeable Zn–air battery using the as-prepared material as air-cathode also shows a high power density (143.1 mW cm-2) –even comparable to a commercial Pt/C-RuO2-based battery. This methodology offers a new prospect in the design and synthesis of non-carbonized MOF bi-functional electrocatalysts for efficient catalysis towards ORR and OER.

Promotion of palladium catalysis by silver for ethanol electro-oxidation in alkaline electrolyte

2014 ◽  
Vol 39 (6) ◽  
pp. 2497-2504 ◽  
Author(s):  
Yuan-Yuan Feng ◽  
Zeng-Hua Liu ◽  
Wei-Qing Kong ◽  
Qian-Ying Yin ◽  
Li-Xia Du
Keyword(s):  
Palladium Catalysis ◽  
Alkaline Electrolyte ◽  
Electro Oxidation

A facile route to prepare PdPt alloys for ethanol electro-oxidation in alkaline electrolyte

2011 ◽  
Vol 65 (2) ◽  
pp. 215-218 ◽  
Author(s):  
Sheng-Chieh Lin ◽  
Jing-Yu Chen ◽  
Yi-Fan Hsieh ◽  
Pu-Wei Wu
Keyword(s):  
Alkaline Electrolyte ◽  
Electro Oxidation ◽  
Facile Route
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