Palladium/Carbon (Pd/C, Premetek) as Electrocatalysts for Electrolyzer and Fuel Cell, 0.5 g/bottle, CEFCPdC
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Palladium on Carbon (Pd/C) is a highly versatile electrocatalyst that serves as the primary alternative to Platinum (Pt/C). While Pt is often the "gold standard" for hydrogen reactions, Pd/C is actually the superior choice for specific organic fuels and is increasingly used in alkaline systems due to its lower cost and unique hydrogen-absorption properties.
Pd/C is most famous for its role in Direct Formic Acid Fuel Cells (DFAFC) and alkaline systems. (1) The Formic Acid Specialist: In DFAFCs, Pd/C is significantly better than Pt/C at the anode. It follows a "direct pathway" to oxidize formic acid into CO2. Unlike Platinum, which gets poisoned by carbon monoxide (CO) intermediates, Palladium avoids CO formation almost entirely at low voltages. (2) Alkaline Fuel Cells (AEMFC): In alkaline environments, Pd/C shows high activity for both the Hydrogen Oxidation Reaction (HOR) at the anode and the Oxygen Reduction Reaction (ORR) at the cathode. (3) Ethanol & Methanol: While often alloyed (as seen in the previous Pt-alloy discussions), pure Pd/C is highly effective for the Ethanol Oxidation Reaction (EOR) in alkaline media, facilitating more complete oxidation compared to many other non-platinum catalysts.
In water electrolysis, Pd/C is primarily a cathode material. (1) Hydrogen Evolution Reaction (HER): Pd/C is a very efficient catalyst for producing hydrogen gas. Its performance in acidic PEM electrolyzers is nearly as good as Pt/C. (2) Hydrogen "Sponge": Palladium has a unique ability to absorb hydrogen into its lattice (forming palladium hydride). This property helps in the initial steps of the HER, where hydrogen atoms must be adsorbed onto the surface before they combine into H2 gas. (3) Hybrid Electrolysis: Pd/C is frequently used in "hybrid" systems where, instead of just splitting water, the electrolyzer is used to oxidize waste or biomass (like glycerol) at the anode while producing H2 at the cathode.
| Part Number |
CEFCEPdC5 |
CEFCEPdC10 |
CEFCEPdC20 |
CEFCEPdC40 |
CEFCEPdCKB40 |
| Palladium/Carbon Content |
5 wt% Pd, 95 wt% carbon black (Vulcan XC-72) |
10 wt% Pd, 90 wt% carbon black (Vulcan XC-72) |
20 wt% Pd, 80 wt% carbon black (Vulcan XC-72) |
40 wt% Pd, 60 wt% carbon black (Vulcan XC-72) |
40 wt% Pd, 60 wt% carbon black (Ketjen Black) |
| Metal Surface Area |
~200 m2/g |
~180 m2/g |
~100 m2/g |
~80 m2/g |
~150 m2/g |
| Catalyst BET Surface Area: |
~235 m2/g |
~225 m2/g |
~200 m2/g |
~150 m2/g |
~480 m2/g |
| Metal Crystallite Size |
1-3 nm |
2-3 nm |
2-4 nm |
3-8 mm |
3-5 nm |
| Catalyst granule size D(100) |
≤ 75 µm |
≤ 75 µm |
≤ 75 µm |
≤ 75 µm |
≤ 75 µm |
| Impurities |
≤ 500 ppm |
≤ 500 ppm |
≤ 500 ppm |
≤ 500 ppm |
≤ 500 ppm |
| Package Size | 0.5 g/bottle | 0.5 g/bottle | 0.5 g/bottle | 0.5 g/bottle | 0.5 g/bottle |
Notes: Please try to store the Pd/C powder in a dry place.
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