Hydrogen peroxide and electric current have had a close relationship for a long time. The Weißenstein process for producing H₂O₂ on an industrial scale, which was invented more than 100 years ago, is based on electrolysis. Nowadays industrial companies almost exclusively use the anthraquinone process (see the box), in which hydrogen peroxide is produced with the help of a reaction carrier. The Danish company HPNow, a startup based in Copenhagen, is now developing a process that harks back to the origins of H₂O₂ production. It has developed a technology that uses a fully automatic system to transform water, air, and electricity into hydrogen peroxide. This technology looks so promising that Evonik’s venture capital arm acquired a minority share in the young company as part of its Series A financing round at the end of 2017. “HPNow can help the electrochemical production of H₂O₂ to achieve a breakthrough,” says Bernhard Mohr, the Head of Venture Capital at Evonik.