Hydrogen sourced from green electricity can increase the share of renewables in the transportation sector and reduce particulate matter and nitrogen oxide emissions. There is a catch, though – green gas production is still too expensive. The Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW) and its partners recently tested an option on a research platform that could help cut costs. In early 2019, this consortium deployed a research electrolyzer for a trial at a commercial power-to-gas plant in the southern German town of Grenzach-Wyhlen. It performed well. With the benefit of new electrode coatings, scientists managed to increase power density, outperforming the plant’s industrial equipment by 20 percent. What is more, the research electrolyzer consists of just a few parts and is better suited for mass manufacturing. This advance could drive down the cost of electrolyzers. The researchers are now investigating the improved electrode coating’s durability.