碱性和酸性条件下均稳定的高效氧电催化剂:具有多活性中心的多孔纳米片复合材料(英文) |
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作者姓名: | 夏雁楠 程义 王锐 孟子寒 迈耶昆庭 赵川 张海宁 罗任 李扬 唐浩林 |
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作者单位: | 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology;2. Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory;3. Hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy, Central South University;4. School of Chemistry, The University of New South Wales |
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基金项目: | supported by the National Natural Science Foundation of China (U19A2017, 22272206 and 51976143);;the National Key Research and Development Program of China (2018YFA0702001);;the Natural Science Foundation of Hunan Province (S2021JJMSXM3153);;Zhao C acknowledges Australian Research Council for financial support (FT170100224, LP200100255, and IC200100023); |
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摘 要: | 可逆的氧还原反应(ORR)和氧析出反应(OER)需要多种类型的活性中心来缓冲质子耦合/解耦的四电子过程.本文通过一种简单环保的熔融NaCl模板法合成了碳包覆FeNi合金、金属-N物种和N缺陷共掺杂的多孔纳米片(FeNi-N/PCN).得到的FeNi-N/PCN作为氧电催化剂在碱性(E1/2为0.88 VRHE, Ej=10为1.57 VRHE)和酸性介质(E1/2为0.78 VRHE, Ej=10为1.76 VRHE)中均表现出优异的ORR和OER性能.此外,该FeNi-N/PCN催化剂在锌空气电池中表现出2 2 4 m W c m-2的功率密度和691 m A h g-1的比容量,分别是Pt/RuO2组合的1.34和1.20倍.这些优异的性能可以归因于具有多类型活性位点的层状碳纳米片结构,包括碳包覆FeNi合金、N缺陷和金属-N位点(M–Nx).
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