High‐Performance Electrocatalysts for Oxygen Reduction Based on Nitrogen‐Doped Porous Carbon from Hydrothermal Treatment of Glucose and Dicyandiamide
High‐Performance Electrocatalysts for Oxygen Reduction Based on Nitrogen‐Doped Porous Carbon from Hydrothermal Treatment of Glucose and Dicyandiamide
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DOI：
10.1002/celc.201500002
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
Xiaojun Liu;Ligui Li;Weijia Zhou;Yucheng Zhou;W. Niu;Shaowei Chen
中科院分区：
文献类型：
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作者：
Xiaojun Liu;Ligui Li;Weijia Zhou;Yucheng Zhou;W. Niu;Shaowei Chen
以葡萄糖和双氰胺为前驱体，ZnCl 2为活化剂，采用控温水热法制备了N掺杂多孔炭。氮掺杂通过XPS测量进行定量测定，并以吡啶、吡咯、石墨和吡啶N +、O+氮原子的形式进行鉴定。通过SEM、TEM、XRD、拉曼、FTIR和BET等测试手段对样品进行了结构分析，结果表明，所制备的多孔碳具有微晶石墨结构，比表面积高达1000 m2/g。电化学研究表明，所制备的样品在碱性介质中均表现出较好的催化活性。在800 8 Cw下制备的Pt/C催化剂的起始电位为+0.96 V，氧完全还原为OH-，具有良好的上级耐甲烷性和循环稳定性。
As ynthetic metho dw as developed for the preparation of Ndoped porous carbon through hydrotherma lt reatment at controlled temperatures by using glucos ea nd dicyandiamide as precursors and ZnCl2 as an activation reagent. Nitrogen doping was quantitatively determined by using XPS measurements and identified in the forms of pyridinic, pyrrolic ,g raphitic, and pyridinic N + ¢ O ¢ nitrogen atoms. Further structural analysi sb y using SEM, TEM, XRD, Raman, FTIR, and BET measurements showe dt hat the N-doped porou sc arbon se xhibited am icrocrystalline graphite structure and ah igh specific surface area up to 1000 m 2 g ¢1 .E lectrochemical studies showed that the samples all exhibited ar emarkabl eO RR catalytic activity in alkaline media, which was comparable to that of state-of-the-art Pt/C catalysts, and the one prepared at 800 8 Cw as found to be the best among the series with an onset potentia lo f +0.96 V, almos tc omplete reduction of oxygen to OH ¢ ,a nd superior methano lt olerance and cycling stability.