Oxygen evolution catalysts on supports with a 3-D orgered array structure and intrinsic proton conductivity for proton exchange membrane steam electrolysis - Xu, Junyuan; Aili, David; Li, Qingfeng; Christensen, Erik; Jensen, Jens Oluf; Zhang, Wei; Hansen, Martin Kalmar; Liu, Gaoyang; Wang, Xindong; Bjerrum, Niels J.