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This is true, but it probably is the most efficient way to get hydrogen into use economically to begin to build some demand/scale. Fuel cells are really expensive. But an ICE that burns hydrogen is pretty similar to one that burns Natural Gas, and those have been around in the commercial sector for a decade. They fit in the same places as a diesel or NG engine, they have similar fueling processes and maintenance. It would be pretty easy for an OEM to go that route until fuel cells become more financially viable. Personally, I see hydrogen as the "diesel" of the future that's likely to be used in applications where batteries really don't work well (continuous, heavy duty work like long distance towing, digging, or farming for example). But the Asian manufacturers seem to be investing more than American ones for passenger tech too:ICE can be made to run on it but is not the most efficient way to derive the power potential from the hydrogen.
Toyota and Yamaha are developing a hydrogen-fueled V8 engine
The notion of powering an internal combustion engine with hydrogen is not a new one.
www.cnbc.com
Making a splash with hydrogen internal combustion engines | Cummins Inc.
Cummins and Hydrogen Internal Combustion Engine (ICE) Development Our hydrogen-fueled engine development program is one of our latest steps to advance zero-carbon technology. Customers are taking notice and so are governments.
www.cummins.com
They just have to scale production and figure out fueling infrastructure which are both sizeable issues but probably not overly complex. Seems like it would probably just take time and money.