Abstract
In recent years, ultrathin layer Pt has intrigued the fuel cell community to a greater extent, particularly for low-temperature hydrogen-powered fuel cell applications. Special emphasis is given in this study to decorate platinum catalyst layers with optimal size on carbon for hydrogen-powered fuel cells. In this work, we report a unique long-time-reduction technique using K2PtCl4 as a precursor to selectively deposit Pt nanoparticles that can be dispersed on the support. These electrocatalysts boost oxygen reduction activity with an ultrathin metal loading of 80 μg cm−2. A long-time-reduction procedure permits selective Pt adsorption on carbon, enabling their strong-affinity/interaction and thereby preserves more than 65% of activity even after 30,000 cycles at 60 °C. Cell performance and stability are enhanced with an ultrathin layer and optimum size formed by closely spaced carbon support and the electrode layer. We also design compact and lightweight indigenous cell components for hydrogen-powered fuel-cell studies. The indigenously designed 8-cell portable stack confirms excellent power output and stability during start-up and shutdown conditions. An indigenous hydrogen-powered portable stack is also subjected to a varsity of multi-segment applications like mobile charging, micro-fan, and LED lights.
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