Neutrino Energy?

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I was watching Masters of the Universe last night (kek) and this character said he made a car run on neutrinos. I knew they were real, and that, like, zillions of them pass through us all the time but I didn't think they could be harnessed for energy. Lo and behold, I find out that they do have mass (2015) and that, supposedly, a special type of graphene can be used to convert their kinetic energy into electricity.
Is this for real? Seems like it would be the holy grail of clean, renewable, sustainable energy.