School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, PR China.
School of Aeronautics and Astronautics, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai 200240, PR China.
J Colloid Interface Sci. 2017 Apr 15;492:8-14. doi: 10.1016/j.jcis.2016.12.064. Epub 2016 Dec 29.
Nitrogen-doped mesoporous carbon nanosheets (NMCNs) with uniform hexagonal structures are fabricated via the thermal treatment of polyaniline enwrapped cobalt hydroxide (Co(OH)) nanosheets and the subsequent acid etching of the resulting composites. It is found that the morphologies, poroisties and compositions of the NMCNs are greatly dependent on the ratio of the added aniline and Co(OH) nanosheets, which can in turn affect the electrochemical behavior of the NMCNs. As the electrocatalyst for oxygen reduction reaction in alkaline media, the NMCNs obtained with the aniline/Co(OH) ratio of ∼1.2 manifest excellent perfromance with the onset potential of -0.119V, the half-wave potential of -0.182V and the limiting current density of 5.06mAcm, which are superior to most of the previously reported N-doped porous carbon nanosheets.
氮掺杂介孔碳纳米片（NMCNs）具有均匀的六方结构，是通过苯胺包裹的钴氢氧化物（Co(OH))纳米片的热处理以及随后对复合材料的酸蚀来制备的。研究发现，NMCNs 的形态、多孔性和组成极大地依赖于加入的苯胺和 Co(OH)纳米片的比例，这反过来又会影响 NMCNs 的电化学行为。作为碱性介质中氧还原反应的电催化剂，在苯胺/Co(OH)比例约为 1.2 时获得的 NMCNs 具有优异的性能，起始电位为-0.119V，半波电位为-0.182V，极限电流密度为 5.06mAcm，优于大多数先前报道的 N 掺杂多孔碳纳米片。
