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首页> 外文期刊>Journal of materials science >Facile hydrothermal synthesis of 3D flower-like NiCo_2O_4/CeO_2 composite as effective oxygen reduction reaction catalyst
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Facile hydrothermal synthesis of 3D flower-like NiCo_2O_4/CeO_2 composite as effective oxygen reduction reaction catalyst

机译：适合水热合成3D花样NicO_2O_4 / CEO_2复合材料作为有效的氧还原反应催化剂

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摘要

Exploiting high-performance and cost-effective non-noble metal catalysts for oxygen reduction reaction (ORR) is still greatly important for energy storage devices such as metal-air batteries and fuel cells. In this work, CeO_2, NiCo_2O_4, and NiCo_2O_4/ CeO_2 were synthetized by facile hydrothermal method and used as an ORR catalyst. The as-prepared CeO_2, NiCo_2O_4, and NiCo_2O_4/CeO_2 samples were measured by XRD, XPS, SEM, and TEM. Electrochemical characterization tests exhibit that the ORR activity of NiCo_2O_4 is evidently enhanced by blending with CeO_2 nanoparticles. The NiCo_2O_4/CeO_2 composite exhibits more superior electrocatalytic performances and stability in alkaline solution as compared to the pure CeO_2 and NiCo_2O_4. The electrochemical performance of composite is very near to that of 20 wt% Pt/C. Owing to the synergistic interactions, NiCo_2O_4/CeO_2 favors a four-electron pathway in ORR and exhibits a higher ORR activity than CeO_2 and NiCo_2O_4. The outstanding performance confirms the NiCo_2O_4/CeO_2 composite as a promising efficient ORR catalyst in metal-air batteries and fuel cells.
机译：利用用于氧还原反应（ORR）的高性能和经济效益的非贵金属催化剂对诸如金属 - 空气电池和燃料电池的能量存储装置仍然非常重要。在这项工作中，通过容易的水热法合成CEO_2，Nico_2O_4和Nico_2O_4 / CeO_2并用作ORR催化剂。通过XRD，XPS，SEM和TEM测量AS准备的CEO_2，NICO_2O_4和NICO_2O_4 / CEO_2样本。电化学表征试验表明，通过与CeO_2纳米颗粒混合显然增强了NicO_2O_4的ORR活性。与纯CeO_2和Nico_2O_4相比，Nico_2O_4 / CEO_2复合材料表现出更优异的电催化性能和碱性溶液中的稳定性。复合材料的电化学性能非常靠近20wt％pt / c的电化学性能。由于协同相互作用，Nico_2O_4 / CEO_2在ORR中有一个四电子通路，并且比CEO_2和NICO_2O_4表现出更高的ORR活动。优异的性能证实了Nico_2O_4 / CEO_2复合材料作为金属 - 空气电池和燃料电池的有希望的高效ORR催化剂。

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  • 来源
    《Journal of materials science》 |2020年第19期|16600-16608|共9页
  • 作者

    Jinxing Wang; Xiaoyang Dong; Jingdong Yang; Ling Zhu; Wen Zeng; Jingfeng Wang;

  • 作者单位

    College of Materials Science and Engineering Chongqing University Chongqing China;

    College of Materials Science and Engineering Chongqing University Chongqing China;

    College of Materials Science and Engineering Chongqing University Chongqing China;

    College of Materials Science and Engineering Chongqing University Chongqing China;

    College of Materials Science and Engineering Chongqing University Chongqing China;

    College of Materials Science and Engineering Chongqing University Chongqing China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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