The Hang Seng University of Hong Kong 1 article published in JoVE Chemistry Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production Pui-Ching Poon*1, Ka-Man Lee*1, Yuanhao Wang2, William Wai Yan Lam1, Peter Shu-Wai Leung1, Xiao-Ying Lu1, Weiqun Li3, B. Layla Mehdi3, Yang Lu4, Chi-Wing Tsang1, Eugene Yin Cheung Wong2 1Faculty of Science and Technology, Technological and Higher Education Institute of Hong Kong (THEi), 2Department of Supply Chain and Information Management, The Hang Seng University of Hong Kong, 3Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, 4Laboratory of Building Environment and New Energy Resources, School of Civil Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology Here, we present a protocol to synthesize Co nanoparticles supported on carbon nanotubes with Co- and N- dopants for hydrogen productions.