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杨会田, 马姣君, 刘思焱, 等. 铁、镍负载氮掺杂碳基双功能催化剂的制备及性能[J]. 桂林电子科技大学学报, 2024, 44(3): 229-236. DOI: 10.16725/j.1673-808X.2021253
引用本文: 杨会田, 马姣君, 刘思焱, 等. 铁、镍负载氮掺杂碳基双功能催化剂的制备及性能[J]. 桂林电子科技大学学报, 2024, 44(3): 229-236. DOI: 10.16725/j.1673-808X.2021253
YANG Huitian, MA Jiaojun, LIU Siyan, et al. Preparation and properties of Fe and Ni supported nitrogen doped carbon based bifunctional Catalysts[J]. Journal of Guilin University of Electronic Technology, 2024, 44(3): 229-236. DOI: 10.16725/j.1673-808X.2021253
Citation: YANG Huitian, MA Jiaojun, LIU Siyan, et al. Preparation and properties of Fe and Ni supported nitrogen doped carbon based bifunctional Catalysts[J]. Journal of Guilin University of Electronic Technology, 2024, 44(3): 229-236. DOI: 10.16725/j.1673-808X.2021253

铁、镍负载氮掺杂碳基双功能催化剂的制备及性能

Preparation and properties of Fe and Ni supported nitrogen doped carbon based bifunctional Catalysts

  • 摘要: 针对燃料电池氧发生还原反应(ORR)、氧析出反应(OER)所需催化剂材料存在的储量稀少、价格昂贵及ORR、OER性能不能兼得等问题,提出一种利用水-浴法,掺杂Fe、Ni制备FeNi/C-PM-X双功能催化剂的方法。利用场发射扫描电镜、场发射透射电镜分析其表面形貌、组成元素;利用物理吸附仪表征样品的比表面积和孔径;利用X-射线衍射仪测试材料的晶格结构;利用光谱仪(分析样品的石墨化程度;利用X-射线光电子能谱仪表征样品元素价态、元素含量及含有的官能团。研究发现,催化剂FeNi/C-PM-900具有优异的抗甲醇中毒能力,且氧还原反应半波电位达0.801 V,可与铂基催化剂相媲美;电流密度为10 mA·cm−2时,FeNi/C-PM-900的氧析出反应过电位为0.44 V,双功能催化剂良好;Fe、Ni金属掺杂碳材料具有较理想的比表面积和稳定性。实验结果表明,Fe掺杂可大大加速电荷转移动力学,并在Ni中心与自身之间产生协同效应,可极大提高氧还原和氧析出性能。

     

    Abstract: In order to solve the problems of scarce and expensive catalyst materials required for oxygen reduction reaction (ORR) and oxygen precipitation reaction (OER) in fuel cells, a dual-function FeNi/C-PM-X catalyst was prepared by water-bath method and doped with Fe and Ni. SEM and TEM were used to analyze its surface morphology and composition. Physical adsorption instrument was used to characterize the specific surface area and pore size of the sample. The lattice structure of the material was tested by X-ray diffractometer. Use spectrometers to analyze the graphitization degree of samples; X-ray photoelectron spectroscopy (XPS) was used to characterize the valence state, element content and functional groups of the samples. It was found that the catalyst FeNi/C-PM-900 had excellent resistance to methanol poisoning, and the half-wave potential of oxygen reduction reaction reached 0.801 V, which was comparable to platinum-based catalyst.When the current density is 10 mA·cm−2, the overpotential of oxygen precipitation reaction of FeNi/C-PM-900 is 0.44 V, and the dual-function catalyst is good. Fe and Ni metal doped carbon materials have ideal specific surface area and stability. The experimental results show that Fe doping can greatly accelerate the charge transfer kinetics and produce a synergistic effect between the Ni center and itself, which can greatly improve the oxygen reduction and oxygen precipitation performance.

     

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