热解温度对MOFs衍生的ZnO@CN纳米催化剂氧还原性能的影响

发布时间：2018-02-25 22:07

  本文关键词： 燃料电池 氧还原反应 氮掺杂碳 纳米催化剂　出处：《现代化工》2017年10期 　论文类型：期刊论文

【摘要】：通过水热法合成Zn-MOF材料,并将其高温热解制备得到Zn O@CN纳米催化剂。通过X射线衍射谱、扫描电子显微镜表征了Zn O@CN的结构和组成。为了探究热解温度对Zn O@CN催化性能的影响,将制得的Zn-MOF材料在不同温度下热解分别得到Zn O@CN-600、Zn O@CN-700、Zn O@CN-800、Zn O@CN-900,通过氧还原反应测试其催化活性。结果表明,热解温度为900℃时制得的Zn O@CN-900起始电势和半波电势分别为0.890 V和0.780 V。动力学研究结果表明,Zn O@CN-900的电子转移数约为4,证明氧气分子在Zn O@CN-900催化剂表面还原采用四电子路径。
[Abstract]:The Zn-MOF materials were synthesized by hydrothermal method and pyrolyzed at high temperature to obtain ZnOOC CN nanocatalysts. The structure and composition of ZnOOC @ CN were characterized by X-ray diffraction spectroscopy and scanning electron microscope. In order to investigate the effect of pyrolysis temperature on the catalytic performance of ZnO @ CN, the structure and composition of ZnO @ CN were characterized by scanning electron microscope (SEM) and X-ray diffraction spectroscopy (XRD). The prepared Zn-MOF materials were pyrolyzed at different temperatures to obtain Zn-Or CN-600 / Zn-O @ CN-700 Zn-O @ CN-800 Zn-OCN-900 and their catalytic activity was tested by oxygen reduction reaction. The initial potential and half-wave potential of ZnOCN-900 prepared at 900 鈩，

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