Novel Co(3)O(4) Nanoparticles/Nitrogen-Doped Carbon Composites with Extraordinary Catalytic Activity for Oxygen Evolution Reaction (OER).
Novel Co(3)O(4) Nanoparticles/Nitrogen-Doped Carbon Composites with Extraordinary Catalytic Activity for Oxygen Evolution Reaction (OER).
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DOI：
10.1007/s40820-017-0170-4
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发表时间：
2018
影响因子：
26.6
通讯作者：
Luo X
中科院分区：
文献类型：
--
作者：
Yang X;Chen J;Chen Y;Feng P;Lai H;Li J;Luo X
本文采用一种简单的方法制备了不同结构的纳米Co3O4/掺氮碳(Co3O4/NPC)复合材料。通过对ZIF-67前驱体进行合理的形貌设计，实现了对其结构的控制，然后将其在空气中热解，得到了Co3O4/NPC复合材料。由花状ZIF-67衍生的M-Co3O4/NPC复合材料在催化析氧反应(OER)中表现出比菱形十二面体和空心球形ZIF-67更好的催化活性。前者的过电位为0.3nV，起始电位为1.41nV，塔菲尔斜率为83 mV，−为1，具有良好的稳定性。(10h后OER活性保持94.7%。)花状M-Co3O4/NPC复合材料在OER中的优异性能归功于其良好的结构。本文的在线版本(10.1007/s408200170170-4)包含补充材料，可供授权用户使用。
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. The online version of this article (10.1007/s40820-017-0170-4) contains supplementary material, which is available to authorized users.
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