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One of the biggest future applications of hydrogen is in fuel cells, where platinum on carbon-type catalysts are used for synthesizing water out of hydrogen and oxygen, thus releasing energy. The Hydrogen Council is eyeing 600-900 million tonnes of clean hydrogen by 2050, including for fuel cell vehicles,"green" steel, green methane, and green ammonia, used as a fuel feedstock in maritime shipping."This is an ominous task. How much clean hydrogen are we gonna need? It's an awesome amount of material," Watson said.
Watson said he fears whether enough energy can be stored to meet peak energy demand, both on a daily basis and seasonally. He pulled up a chart showing 30,000 terawatt hours of electricity are generated globally. Most clean energy agencies think it needs to triple by 2050. "Your facts are right, but we should not forget that we are in a transition and new, improved technologies will be developed as we progress," he concluded.