 This research has developed a new type of catalyst for the oxygen evolution reaction, OER, that works more efficiently than existing catalysts in acidic environments. The catalyst consists of a zinc-doped ruthenium nanowire array and is able to reduce the energy barriers associated with the OER, resulting in higher efficiency and longer life spans. This breakthrough could lead to improved water electrolyzers that can be used to produce hydrogen fuel from water. This article was authored by Daphne Jong, Meng Nan Li, Shui Yong, and others.