Hydrogen Fuel Cell Electric Vehicles (FCEVs) emit only water vapour from their exhaust, positioning them as a zero-emission transport solution critical to decarbonising mobility and meeting climate commitments.
FCEVs generate electricity through an electrochemical reaction between hydrogen and atmospheric oxygen in a fuel cell stack, with water vapour as the sole exhaust emission. This eliminates tailpipe carbon dioxide, particulate matter, and nitrogen oxides, offering a significant air-quality advantage over internal combustion engines.
The true environmental benefit depends on how hydrogen is produced. Green hydrogen, generated via electrolysis powered by renewable energy, ensures a genuinely zero-carbon lifecycle. Grey hydrogen derived from fossil fuels undermines this advantage, making the upstream production pathway a decisive policy variable.
India's National Green Hydrogen Mission targets large-scale green hydrogen production and aims to position the country as a global export hub. Integrating FCEVs into heavy transport, buses, and freight corridors aligns with this mission and complements battery electric vehicle deployment where range and payload requirements are demanding.
Hydrogen refuelling infrastructure remains nascent, and the cost of fuel cells and green hydrogen production is currently uncompetitive without subsidy support. Scaling electrolyser capacity, reducing renewable energy costs, and establishing safety standards for hydrogen storage are essential implementation prerequisites.
FCEVs represent a technically sound zero-emission pathway, but their transformative potential is contingent on green hydrogen scaling and infrastructure investment. Policy coherence between energy production, distribution, and transport sectors will determine their real-world impact.
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