What happened to hydrogen, and what comes next?

Payne Institute Fellow Steve Griffiths writes about how the year 2021 marked what in hindsight appears to be a near-term peak of hydrogen optimism. In 2021, I led a systematic review of hydrogen for industrial decarbonization that characterized hydrogen as an interconnected sociotechnical system with transformative potential but a number of practical hurdles to overcome if it were to reach its full potential.  July 16, 2026.