Abstract
Our first fuel cell prototype with a novel Au-Pd-Pt catalyst successfully demonstrated power generation. In order to reduce amount of platinum group metals and obtain high CO tolerance, electrochemical atomic layer depositions of Pd and Pt were applied on the porous Au. 5 ML Pd and sub-ML Pt deposition was attempted and amounts of Pd and Pt were electrochemically estimated to be 125 μg/cm2 and 6 μg/cm2, respectively. No catalyst poisoning to 100 ppm CO was observed during the power generation. Though the peak power was poor around 100 mW/cm2, results were satisfying for the first prototype.
Highlights
Fuel cells have been developed for local energy supply, because high efficiency is expected even in a small scale system and low temperature
Amount of Pt was successfully reduced to 6μg/cm[2] and no power drop was observed during 30 minutes power generation test with hydrogen containing 100 ppm CO supply
We proposed the Au-Pd-Pt multilayer catalyst with porous Au core structure to suppress hydrogen adsorption and electrochemical ALD technique to fabricate Pd-Pt layered structure on an Au wire was reported at PowerMEMS 20164
Summary
Fuel cells have been developed for local energy supply, because high efficiency is expected even in a small scale system and low temperature. The catalyst was formed using electrochemical ALD (Atomic Layer Deposition) of Pt on porous Pd. Amount of Pt was successfully reduced to 6μg/cm[2] and no power drop was observed during 30 minutes power generation test with hydrogen containing 100 ppm CO supply. As shown, we proposed the Au-Pd-Pt multilayer catalyst with porous Au core structure to suppress hydrogen adsorption and electrochemical ALD technique to fabricate Pd-Pt layered structure on an Au wire was reported at PowerMEMS 20164. The electrochemical ALD was applied to porous Au layer formed on a Si substrate and construction of a fuel cell was attempted.
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