Hydrogenated Graphenes by Birch Reduction: Influence of Electron and Proton Sources on Hydrogenation Efficiency, Magnetism, and Electrochemistry Alex Yong Sheng Eng, Zdeněk Sofer, Stepan Huber, Daniel Bouša, Miroslav Marysko, Martin Pumera* Chemistry-A European Journal 2015, 21(47), 16828-16838