Nitrogen-doped Carbon Pyrolyzed from ZIF-8 for Electrocatalytic Oxygen Reduction to Hydrogen Peroxide
Dan WangBo FengXiaoxin ZhangYanan LiuPei YanMinghua QiaoBaoning Zong
Abstract
王丹 a 封波 a 张晓昕 b 刘亚楠 a 裴燕 a 乔明华 * ,a 宗保宁 * ,b ( a 复旦大学化学系 上海市分子催化和功能材料重点实验室 上海 200438) ( b 中国石化石油化工科学研究院 催化材料与反应工程国家重点实验室 北京 100083) 摘要 氧气的两电子还原反应(2e-ORR)是绿色、 安全的 H2O2 合成路线.本工作以 Zn 2+ 和 2-甲基咪唑合成的沸石型咪唑 酸框架-8 (ZIF-8)为前驱体, 通过高温热解炭化, 利用 ZIF-8 中的锌在高温下的可挥发性, 制备了非金属氮掺杂石墨化多 孔碳材料(p-ZIF), 系统考察了 ZIF-8 热解炭化温度(900、 950 和 1000 ℃)对催化剂结构和 2e-ORR 催化性能的影响.p-ZIF 不仅保留了 ZIF-8 规整的菱形十二面体形貌, 而且氮含量高, 拥有高的比表面积和多级孔结构.在酸性条件下的 2e-ORR 反应中, 三个 p-
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