Platinum/Carbon (Pt/C, Johnson Matthey) Electrocatalysts for Electrolyzer and Fuel Cell, 0.5 g/bottle, CEFCEJMPtC
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Johnson Matthey (JM) is a global leader in the production of Platinum on Carbon (Pt/C) electrocatalysts, primarily through their HiSPEC® product line. These catalysts are essential components in both energy generation (Fuel Cells) and energy storage/production (Electrolyzers).
In a fuel cell, Pt/C is used at both the anode and the cathode, but it serves different functions and faces different challenges at each. (1) Cathode (Oxygen Reduction Reaction - ORR): This is the "bottleneck" of the fuel cell. Pt/C is used to break the strong $O=O$ bonds. Because ORR is inherently slow, the cathode typically requires much higher platinum loading (often 0.4 mg/cm2 or more) compared to the anode. (2) Anode (Hydrogen Oxidation Reaction - HOR): Platinum is exceptionally efficient at splitting H2. Because this reaction is fast, modern JM catalysts allow for "thrifting" (reducing) platinum levels at the anode to as low as 0.05 mg/cm2 without significant performance loss. (3) Carbon Support: JM uses specialized high-surface-area carbons (HSC) to disperse platinum nanoparticles (typically 2–5 nm). This maximizes the Electrochemical Surface Area (ECSA), which is critical for maximizing power density in automotive applications.
While the anode of an electrolyzer requires iridium (as discussed previously), the cathode relies on platinum to facilitate the Hydrogen Evolution Reaction (HER). (1) The Cathode Catalyst: Pt/C is the industry standard for the electrolyzer cathode. It takes the protons (H+) that have crossed the membrane and combines them with electrons to form pure hydrogen gas (H2). (2) Stability: Unlike the fuel cell cathode, the electrolyzer cathode operates in a reducing environment, which is less corrosive for the carbon support. This allows for very high durability and long-term hydrogen production.
| Part Number |
CEFCEJMPtC4000 |
CEFCEJMPtC9100 |
| Catalyst Types |
HiSPEC4000 |
HiSPEC9100 |
| Platinum Content | 40 wt% Pt on XC-72R | 60 wt% Pt on high surface area carbon |
| Catalyst BET Surface Area: |
- |
80 m2/g |
| Metal Crystallite Size |
~3.5 nm |
~2.8 nm |
| Package Size | 0.5 g/bottle | 0.5 g/bottle |
Notes: Please try to store the Pt/C powder in a dry place.
References:
- V. Karimi, et al. An Effective Route to Enhance Pt/C Electrocatalyst Durability through Addition of Ceramic Nanoparticles to Facilitate Pt Redeposition, ACS Appl. Mater. Interfaces 2024, 16, 48, 65993–66007.
- X. Ren, et al. Current progress and performance improvement of Pt/C catalysts for fuel cells, J. Mater. Chem. A, 2020,8, 24284-24306.