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3D Hierarchical Core–Shell Nanostructured Arrays on Carbon Fibers as Catalysts for Direct Urea Fuel Cells
Advanced Energy Materials ( IF 27.8 ) Pub Date : 2017-10-11 , DOI: 10.1002/aenm.201702207
N. Senthilkumar 1 , G. Gnana kumar 1, 2 , A. Manthiram 2
Affiliation  

Bifunctional cobalt oxide (Co3O4) nanowire catalysts grown on carbon cloth (CC) fibers and their modification with nickel oxide (NiO) and manganese dioxide (MnO2) to produce core–shell nanoarchitectures are explored as catalysts for urea oxidation reaction and oxygen reduction reaction in direct urea fuel cells (DUFC). Based on a systematic electrochemical characterization of the catalyst, the as‐developed core–shell nanoarchitectures are optimized toward DUFC performance. Under alkaline conditions with an anion exchange membrane, the DUFC with a cell configuration of Co3O4@NiO(1:2)/CC(a|c)Co3O4@MnO2(1:2)/CC exhibits a maximum power density of 33.8 mW cm−2 with excellent durability for 120 h without any performance loss. Furthermore, the DUFC exhibits a maximum power density of 23.2 mW cm−2 with human urine as a fuel. These findings offer an approach to convert human waste into treasure.

中文翻译:

碳纤维上的3D分层核-壳纳米结构阵列作为直接尿素燃料电池的催化剂

碳纤维布(CC)纤维上生长的双功能氧化钴(Co 3 O 4)纳米线催化剂及其经氧化镍(NiO)和二氧化锰(MnO 2)改性以产生核-壳纳米结构的研究被用作尿素氧化反应的催化剂和直接尿素燃料电池(DUFC)中的氧还原反应。基于催化剂的系统电化学表征,已开发的核-壳纳米结构针对DUFC性能进行了优化。在带有阴离子交换膜的碱性条件下,DUFC的电池构型为Co 3 O 4 @NiO(1:2)/ CC(a | c)Co 3 O 4 @MnO 2(1:2)/ CC的最大功率密度为33.8 mW cm -2,在120小时内具有出色的耐久性,而没有任何性能损失。此外,以人尿为燃料,DUFC的最大功率密度为23.2mW cm -2。这些发现提供了一种将人类废物转化为宝藏的方法。
更新日期:2017-10-11
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