摘要
水热法合成的棒状CeO_(2)载体(CeO_(2)-R)经过高温NH_(3)氮化,得到了氮化的CeO_(2)载体(N-CeO_(2)-R).采用满孔浸渍法浸渍活性金属Ni,通过XRD、TEM、XPS和H_(2)-TPR等表征手段,研究了载体及催化剂结构.结果表明:棒状CeO_(2)载体在氮化前后,其形貌基本保持不变,同时载体中部分O原子被N原子取代,H2-TPR数据表明氮化后的载体与活性金属之间的相互作用力较强,不会阻碍载体表面与CO_(2)相互接触,能够有效抑制催化剂因活性位点被覆盖而失活,进一步提高了催化剂的催化活性.
Rod-shaped CeO_(2) supports(CeO_(2)-R)synthesized by hydrothermal method were nitrided by NH_(3) at high temperature(denoted as N-CeO_(2)-R).Ni was impregnated by full hole volume impregnation method and the structure of supports and catalysts were characterized by XRD,TEM,XPS and H_(2)-TPR.The results showed that the morphology of the catalysts remained unchanged after nitriding treatment,and some oxygen atoms in the supports were replaced by nitrogen atoms.H_(2)-TPR data showed that the interaction between N-CeO_(2)-R supports and nickel was stronger than that between CeO_(2)-R supports and nickel,thus would not hinder the contact between the support surface and CO_(2),and may effectively inhibit the deactivation of the catalyst by preventing the occupation of active sites,and further improve the activity of the catalysts.
作者
李琳
王晓艳
申东阳
张煜华
李金林
LI Lin;WANG Xiaoyan;SHEN Dongyang;ZHANG Yuhua;LI Jinlin(Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science & School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China)
出处
《中南民族大学学报（自然科学版）》
CAS
北大核心
2021年第3期231-237,共7页
Journal of South-Central University for Nationalities：Natural Science Edition
基金
湖北省自然科学基金资助项目(2019CFB811)
中央高校基本科研业务费专项资金资助项目(CZY19004)。
关键词
氮化
氧化铈
甲烷干重整
二氧化碳
镍基催化剂
nitriding
CeO_(2)
dry reforming of methane
carbon dioxide
nickel based catalyst
