I would guess that he's talking about this story: https://www.chemengonline.com/worlds-first-successful-ammonia-synthesis-using-renewable-hydrogen-and-power/ h

I would guess that he's talking about this story: https://www.chemengonline.com/worlds-first-successful-ammonia-synthesis-using-renewable-hydrogen-and-power/ https://www.chemengonline.com/worlds-first-successful-ammoni... The headline is a misnomer. Renewable ammonia was made from electrolytic hydrogen via hydroelectricity in the 20th century. Ammonia-fueled generators have been demonstrated before too. Even the new low pressure catalyst has near-identical antecedents. All that said, putting existing ideas together in an evolutionary way can yield revolutionary outcomes. In the past 40 years there has been no revolutionary change in terrestrial photovoltaic cell technology, but continuously compounded evolutionary changes have taken the industry from kilowatts to gigawatts of annual cell production.