Electrodeposition of Hydrogen Adatoms on Graphene Quan-feng He, Lianhuan Han, Dongping Zhan* , Zhong-Qun Tian State Key Laboratory of Physical Chemistry of Solid Surfaces; Fujian Science & Technology Innovation Laboratory for Energy Materials of China; Engineering Research Centre of Electrochemical Technologies of Ministry of Education; Department of Chemistry, College of Chemistry and Chemical Engineering; and Department of Mechanical and Electrical Engineering, School of Aerospace Engineering, Xiamen University; Xiamen 361005, China. E-mail: dpzhan@xmu.edu.cn Conductive carbon materials, such as graphite, glassy carbon, carbon black, carbon nanotube, graphene, etc., are used extensively as electrode materials or catalyst carriers in various electrochemical researches because...