Yang, HNKo, YOKim, WJ2018-11-082018-11-082018-11-08201810.1016/j.ijhydene.2017.12.135https://infoscience.epfl.ch/handle/20.500.14299/1497193-D structured PtJrGO-polyethyleneimine-functionalized MWCNTs prepared with different mass ratio of rGO and MWCNT for proton exchange membrane fuel celltext::journal::journal article::research article