title: Metal-catalyst-free carbohydrazide fuel cells with three-dimensional graphene anodes.
abstract: As a potential solution to concerns on sustainable energy, the wide spread commercialization of fuel cell has long been hindered by limited reserves and relatively high costs of metal catalysts. 3D graphene, a carbon-only catalyst prepared by reduction of carbon monoxide with lithium oxide, is found to electrochemically catalyze carbohydrazide oxidation reaction efficiently. A prototype of a completely metal-catalyst-free anion exchange membrane fuel cell (AEMFC) with a 3D graphene anode catalyst and an N-doped CNT (N-CNT) cathode catalyst generate a peak power density of 24.9 mW cm(-2) . The average number of electrons electrochemically extracted from one carbohydrazide molecule is 4.9, indicating the existence of CN bond activation, which is a key factor contributing to high fuel utilization efficiency.
authors.affiliation: Chemical and Biological Engineering Department, Iowa State University, Ames, IA 50011 (USA).
authors.forename: Ji
authors.initials: J
authors.lastname: Qi
authors.forename: Neeva
authors.initials: N
authors.lastname: Benipal
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: David J
authors.initials: DJ
authors.lastname: Chadderdon
authors.forename: Yibo
authors.initials: Y
authors.lastname: Jiang
authors.forename: Wei
authors.initials: W
authors.lastname: Wei
authors.forename: Yun Hang
authors.initials: YH
authors.lastname: Hu
authors.forename: Wenzhen
authors.initials: W
authors.lastname: Li
mesh_terms: D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D006834:Hydrazines / Q000737:chemistry*; D007474:Ion Exchange; D008567:Membranes, Artificial; D008958:Models, Molecular; D008968:Molecular Conformation
chemical_list: D006834:Hydrazines; D008567:Membranes, Artificial; D006108:Graphite; C019289:carbohydrazide
keywords: anodes; fuel cells; graphene; membranes; oxidation