Remember that this cost ($1k) is not a "one-tine" cost over the live of the vehicle. Typically, the platinum in the fuel cell electrodes suffer from gradual degradation and poisoning over time. Hence, it has to be replaced (at least once) over the live of the vehicle.

In summary, you need to consider the replacement cost of the fuel cells over the live of the vehicle and not just the "initial" cost.

Hope this helps answer your question.

Professor Yehia Khalil, Yale University, USA

Fellow of the University of Oxford, UK

http://fuelcelltoday.com/analysis/analyst-views/2013/13-11-06-the-cost-of-platinum-in-fuel-cell-electric-vehicles

http://www.kitco.com/commentaries/2017-08-25/Will-the-Fuel-Cells-Vehicles-Save-Platinum-and-Palladium.html