Cobalt/Carbon (Co/C, Premetek) as Electrocatalysts for Electrolyzer and Fuel Cell, 1 g/bottle, CEFCCoC
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Cobalt on Carbon (Co/C) is a leading non-precious metal electrocatalyst, particularly valued for its role in alkaline systems. While it lacks the extreme activity of platinum in acidic environments, it is a champion of cost-efficiency and selectivity in alkaline fuel cells, electrolyzers, and CO2 conversion.
In the alkaline environment of Anion Exchange Membrane Fuel Cells, Co/C is a primary candidate for replacing expensive platinum group metals. (1) Oxygen Reduction Reaction (ORR): Co/C—and specifically Co-N/C (cobalt-nitrogen-doped carbon)—is one of the most studied non-precious catalysts for the cathode. The cobalt-nitrogen (Co-Nx) sites create a specific electronic environment that can facilitate the efficient 4-electron reduction of oxygen, mimicking the behavior of platinum. (2) Metal-Air Batteries: Beyond fuel cells, Co/C is a standard catalyst for the air cathode in Zinc-Air batteries. It helps manage the discharge (oxygen reduction) and, in some bifunctional versions, the charge (oxygen evolution) cycles.
In water splitting, Co/C is primarily utilized in Alkaline Water Electrolyzers (AWE) and AEM systems. (1) Oxygen Evolution Reaction (OER): Cobalt oxides (formed on the surface of Co/C) are among the most active non-precious catalysts for splitting water. They are often alloyed with iron (Co-Fe/C) to create spinel structures that provide record-low overpotentials for the OER. (2) Hydrogen Evolution Reaction (HER): While nickel is more common for the hydrogen side, Co/C is highly effective in neutral or alkaline pH. It is frequently used in research as a "bifunctional" catalyst that can operate on both the anode and cathode of an electrolyzer.
| Part Number |
CEFCECoC5 |
CEFCECoC10 |
CEFCENiC20 |
CEFCECoC40 |
| Cobalt/Carbon Content |
5 wt% Co, 95 wt% carbon black (Vulcan XC-72) |
10 wt% Co, 90 wt% carbon black (Vulcan XC-72) |
20 wt% Co, 80 wt% carbon black (Vulcan XC-72) |
40 wt% Co, 60 wt% carbon black (Vulcan XC-72) |
| Metal Surface Area |
~30 m2/g |
~25 m2/g |
~20 m2/g |
~15 m2/g |
| Catalyst BET Surface Area: |
~235 m2/g |
~225 m2/g |
~200 m2/g |
~150 m2/g |
| Metal Crystallite Size |
~20 nm |
~25 nm |
~25 nm |
~40 nm |
| Catalyst granule size D(100) |
≤ 75 µm |
≤ 75 µm |
≤75 µm |
≤75 µm |
| Impurities |
≤ 500 ppm |
≤ 500 ppm |
≤ 500 ppm |
≤ 500 ppm |
| Package Size | 1.0 g/bottle | 1.0 g/bottle | 1.0 g/bottle | 1.0 g/bottle |
Notes: Please try to store the Co/C powder in a dry place.
References:
- H. Guo, et al. Cobalt nanoparticle-embedded nitrogen-doped carbon/carbon nanotube frameworks derived from a metal–organic framework for tri-functional ORR, OER and HER electrocatalysis, J. Mater. Chem. A, 2019,7, 3664-3672.
- Y. Su, et al. Cobalt nanoparticles embedded in N-doped carbon as an efficient bifunctional electrocatalyst for oxygen reduction and evolution reactions, Nanoscale, 2014,6, 15080-15089.