Nitrogen-doped graphene hydrogel-supported NiPt-CeO x nanocomposites and their superior catalysis for hydrogen generation from hydrazine at room temperature |
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Authors: | Du Xiaoqiong Liu Chao Du Cheng Cai Ping Cheng Gongzhen Luo Wei |
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Affiliation: | 1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China;2. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China;Key laboratory of Advanced Energy Materials Chemistry(Ministry of Education), Nankai University, Tianjin 300071, China |
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Abstract: | The safe and efficient storage and release of hydrogen is one of the key technological challenges for the fuel cell-based hydrogen economy.Hydrazine monohydrate has attracted considerable attention as a safe and convent chemical hydrogen-storage material.Herein,we report the facile synthesis of NiPt-CeOx nanocomposites supported by three-dimensional nitrogen-doped graphene hydrogels (NGHs) via a simple one-step co-reduction synthesis method.These catalysts were composition-dependent for hydrogen generation from an alkaline solution of hydrazine.(Ni5Pt5)1-(CeOx)0.3/NGH exhibited the highest catalytic activity,with 100% hydrogen selectivity and turnover frequencies of 408 h-1 at 298 K and 3,064 h-1 at 323 K.These superior catalytic performances are attributed to the electronic structure of the NiPt centers,which was modified by the electron interaction between NiPt and CeOx and the strong metal-support interaction between NiPt-CeOx and the NGH. |
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Keywords: | nitrogen-doped graphene hydrogels NiPt-CeOx hydrogen storage hydrazine |
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