通过浸渍法和高温碳化法制备的氮掺杂碳表面修饰的Co/ZrO₂催化剂在逆水煤气变换反应(RWGS)中表现出对CO的高选择性。利用多种表征手段对催化剂的结构和电性质进行分析,并探讨了氮掺杂碳的引入对催化剂比表面积、表面碱性和CO选择性的影响。结果表明,Co/ZrO₂@NC-3h 700催化剂在对H₂吸附解离的同时,保证了充分的CO₂吸附,有效地减少了副产物CH₄的产生。在600℃苛刻温度条件下,经过24 h活性测试,Co/ZrO₂@NC-3h 700催化剂的CO₂转化率和CO选择性分别维持在35%和94%,产物CO选择性高于Co/ZrO₂。

Nitrogen-doped carbon surface modified Co/ZrO₂ catalysts prepared by impregnation and high-temperature carbonization methods show high selectivity for CO in reverse water gas shift reaction (RWGS).The structural and electrical properties of the catalyst are analyzed by means of various characterization methods,and the effects of the addition of nitrogen-doped carbon on specific surface area,surface alkalinity and CO selectivity of the catalyst are studied.Studies results show that Co/ZrO₂@NC-3h 700 catalyst ensures sufficient CO₂ adsorption and effectively reduces the production of CH₄ while adsorbing and dissociating H₂.The conversion of CO₂ and the selectivity of CO over Co/ZrO₂@NC-3h 700 catalyst are maintained at 35% and 94%,respectively after 24 h of activity test at 600℃.The selectivity of CO over the catalyst is higher than that over Co/ZrO₂.

樊成(2000-),男,本科生,研究方向为催化剂的制备,2857278966@qq.com;魏勤洪(1987-),男,博士,副教授,研究方向为碳一化学、多相催化、固体催化材料设计与合成、多孔炭催化材料制备,通讯联系人,weiqinhong@zjou.edu.cn。