Platinum-Ruthenium (Pt-Ru, Premetek) Alloy on Carbon Black as Electrocatalysts for Electrolyzer and Fuel Cell, 0.5 g/bottle, CEFCEPtRuC
Use your own shipping account?
We support FedEx, UPS, and DHL third-party billing for institutional customers.
Place your order first, then email shipping@echemsupplies.com with your account details and order number. We'll generate the label using your account and refund your shipping charges, less a handling fee.
Platinum-Ruthenium (Pt-Ru) is the world's most critical alloy for applications where carbon monoxide (CO) or organic fuels like methanol are present. While Pt-Co and Pt-Ni focus on high activity for pure hydrogen, Pt-Ru is built for resilience and chemical cleaning.
In a standard Hydrogen PEM Fuel Cell, Pt-Ru is almost always used at the anode. (1) The Problem with Pure Pt: If your hydrogen fuel is "dirty" (reformed from natural gas), it contains trace amounts of CO. CO sticks to pure Platinum 100 times more strongly than Hydrogen, which "poisoning" the surface and killing the reaction. (2) The Bifunctional Mechanism: Ru provides a "cleaning" service. It dissociates water molecules at a much lower voltage than Pt to form hydroxyl groups (-OH). These -OH groups react with the CO stuck on the neighboring Pt atoms, oxidizing it into CO2 and freeing up the Pt to process hydrogen again. (3) Direct Methanol Fuel Cells (DMFC): Pt-Ru is the only practical catalyst for DMFC anodes. Methanol oxidation inherently produces CO as an intermediate; without Ru, a methanol fuel cell would stop working within seconds.
In electrolyzers, Pt-Ru has a very specific "reverse" role compared to its fuel cell application. (1) Cathode (HER): While Pt/C is the standard for the Hydrogen Evolution Reaction, Pt-Ru is sometimes used in systems where the water source might have organic impurities or where the system needs to be reversible (a "Unitized Regenerative Fuel Cell"). (2) Anode (OER): Pt-Ru is rarely used as a pure alloy here. In the highly oxidative environment of the electrolyzer anode, both Pt and Ru metal can dissolve. However, Ruthenium Oxide (RuO2) mixed with Iridium Oxide is a common anode catalyst because it is one of the most active materials for splitting water, though it is less stable than pure Iridium.
| Part Number |
CEFCEPtRu11C20 |
CEFCEPtRu11C40 |
CEFCEPtRu11C60 |
CEFCEPtRu11CKB60 |
| Platinum-Ruthenium Content |
20 wt% Pt-Ru (1:1 ratio) (13.2 wt% Pt, 6.8 wt% Ru), 80 wt% carbon black (Vulcan XC-72) |
40 wt% Pt-Ru (1:1 ratio) (26.4 wt% Pt, 13.6 wt% Ru), 60 wt% carbon black (Vulcan XC-72) |
60 wt% Pt-Ru (1:1 ratio) (39.5 wt% Pt, 20.5 wt% Ru), 40 wt% carbon black (Vulcan XC-72) |
60 wt% Pt-Ru (1:1 ratio) (39.5 wt% Pt, 20.5 wt% Ru), 40 wt% carbon black (Ketjen Black) |
| Metal Surface Area |
~140 m2/g |
~100 m2/g |
~80 m2/g |
~120 m2/g |
| Catalyst BET Surface Area: |
~200 m2/g |
~150 m2/g |
~100 m2/g |
~320 m2/g |
| Metal Crystallite Size |
1-2 nm |
2-3 nm |
3-4 nm |
2-4 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 | 0.5 g/bottle | 0.5 g/bottle | 0.5 g/bottle | 1.0 g/bottle |
Notes: Please try to store the Pt-Ru/C powder in a dry place.
References: