| 陈君,隆继兰.双中心MOFs衍生的Co-ZnO@CN纳米材料作为电化学催化剂用于氧还原反应的研究[J].分子催化,2017,31(5):463-471 |
| 双中心MOFs衍生的Co-ZnO@CN纳米材料作为电化学催化剂用于氧还原反应的研究 |
| Bi-centered MOFs-derived Co-ZnO@CN Nano-material as Efficient Electrocatalyst for Oxygen Reduction Reaction |
| 投稿时间：2017-07-21 修订日期：2017-08-10 |
| DOI： |
| 中文关键词: 燃料电池 氧还原反应 氮掺杂碳纳米材料 Co-ZnO@CN |
| 英文关键词:fuel cells oxygen reduction reaction N-doped carbon nanomaterials Co-ZnO@CN |
| 基金项目:四川省教育厅重点项目（466768）；西华师范大学英才科研基金项目（463123）；西华师范大学基本科研业务费专项（416529）. |
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| 中文摘要: |
| 采用水热法合成了一系列的Co-Zn-MOF材料，随后将其在高温下热解，采用自模板的方式得到双中心MOFs衍生的Co-ZnO@CN纳米催化剂.通过调节前驱体的比例和热解温度，优化了制备Co-ZnO@CN纳米催化剂的条件.利用粉末X射线衍射（XRD）和X射线光电子能谱（XPS）对Co-ZnO@CN纳米催化剂的结构及表面化学性质进行表征，采用扫描电子显微镜（SEM）和能量色散谱仪（EDS）考察了Co-ZnO@CN纳米催化剂的形貌和表面化学元素的种类和组成.通过氧还原反应（ORR）测试了催化剂的催化性能.实验结果表明当热解温度为800℃，Co与Zn摩尔质量之比为1：2时，所得到的Co-ZnO（1：2）@CN-800纳米催化剂的催化活性最高，其起始电势和半波电势分别为0.90和0.78 V，此外，通过计算表明该纳米催化剂在氧还原反应中氧分子还原过程遵循4e-反应路径. |
| 英文摘要: |
| A series of Co-Zn-MOF materials are synthesized by using hydrothermal method, then these materials are employed as self-templates to synthesize non-precious bi-centered MOFs-derived Co-ZnO@CN alloy nanocatalysts at high temperatures. The preparation conditions of Co-ZnO@CN materials are optimized by adjusting the molar ratio of precursor and thermolysis temperatures. The XRD and XPS are employed to characterize the structures and surface chemical state of Co-ZnO@CN catalysts, and the SEM and EDS are employed to analyze the morphology and the components of Co-ZnO@CN catalysts, and then these materials are used for ORR to test the catalytic performance. The experimental results indicate that Co-ZnO(1:2)@CN-800 exhibits the optimal activity toward ORR, the onset and half-wave potential of Co-ZnO(1:2)@CN-800 are 0.90 and 0.78 V, respectively. Moreover, The calculation indicates that the reduction of oxygen molecules follow the 4e- route on this catalyst. |
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