We need to make hydrogen fuel cells and water electrolyzers perform better if we want to replace fossil fuels with hydrogen fuel. The simplest way to do so is to operate these devices above room temperature somewhere between 100 and 300°C. At these temperatures, the environment is hot enough to enable faster mass transfer kinetics, higher catalytic rates, and reduced susceptibility to catalyst poisoning, yet cool enough that the devices can be built with minor modifications to existing system components. The approach builds on a phenomenon called intermediate temperature proton conduction on nanostructured metal oxide surfaces. Celadyne Technologies innovation uses a composite approach, leveraging these nanostructured ceramic materials, to achieve a multiple order of magnitude increase in conductivity to relevant levels for membranes used in fuel cells and electrolyzers.