Abstract

Herein, Co₃O₄ nanoparticles/nitrogen-doped carbon (Co₃O₄/NPC) composites with different structures were prepared via a facile method. Structure control was achieved by the rational morphology design of ZIF-67 precursors, which were then pyrolyzed in air to obtain Co₃O₄/NPC composites. When applied as catalysts for the oxygen evolution reaction (OER), the M-Co₃O₄/NPC composites derived from the flower-like ZIF-67 showed superior catalytic activities than those derived from the rhombic dodecahedron and hollow spherical ZIF-67. The former M-Co₃O₄/NPC composite displayed a small over-potential of 0.3 V, low onset potential of 1.41 V, small Tafel slope of 83 mV dec⁻¹, and a desirable stability. (94.7% OER activity was retained after 10 h.) The excellent performance of the flower-like M-Co₃O₄/NPC composite in the OER was attributed to its favorable structure.

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中文翻译：

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小说公司3Ø4 具有卓越的催化活性的纳米颗粒/氮掺杂碳复合材料，用于氧释放反应（OER）

摘要

在此，通过简便的方法制备了具有不同结构的Co ₃ O ₄纳米颗粒/氮掺杂碳（Co ₃ O ₄ / NPC）复合材料。结构控制是通过ZIF-67前体的合理形态设计实现的，然后将其在空气中热解以获得Co ₃ O ₄ / NPC复合材料。当用作氧释放反应（OER）的催化剂时，衍生自花状ZIF-67的M-Co ₃ O ₄ / NPC复合材料显示出比衍生自菱形十二面体和空心球形ZIF-67的那些更高的催化活性。前M-Co ₃ O ₄/ NPC复合材料显示出0.3 V的小过电位，1.41 V的低起始电位，83 mV dec ^-1的小Tafel斜率和理想的稳定性。（10小时后，OER活性保持94.7％。）花状M-Co ₃ O ₄ / NPC复合材料在OER中的优异性能归因于其良好的结构。

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