Unni, Sreekuttan M Carbon Nanohorn-Derived Graphene Nanotubes as a Platinum-Free Fuel Cell Cathode. [electronic resource] - ACS applied materials & interfaces Nov 2015 - 24256-64 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1944-8252 Standard No.: 10.1021/acsami.5b07802 doi