摘要
采用溶胶凝胶法制备了一系列不同Ni/Mg比的NiO-MgO复合氧化物催化剂,并考察了其N_2O催化分解性能。结果表明,NiO-MgO催化剂的N_2O催化分解活性明显优于单一NiO和MgO,当MgO含量为5%时,NiO-MgO复合金属氧化物上N_2O分解活性最佳。XRD、H2-TPR和XPS结果表明,Ni2+是催化分解N_2O的主要活性位点。Mg不作为活性组分,但可通过Ni、Mg之间强烈的相互作用提高催化剂氧化还原能力,进而促进N_2O的催化分解。此外,Mg的加入促进了催化剂中NiO的形成。
A series of NiO-MgO catalysts with different Mgcontents were prepared by a sol-gel method and subsequently employed in the catalytic decomposition of N_2O. The NiO-MgO catalyst with 5% MgO content exhibited the best activity among the NiO-MgO composite metal oxides. The catalysts were characterized by X-ray diffraction（ XRD）, H_2-temperature-programmed reduction（ TPR）, and X-ray photoelectron spectroscopy（ XPS）. The results indicated that Ni^（2＋）was the main active site for the catalytic decomposition of N_2 O,while Mgenhanced the synergetic effect between Niand Mg,contributing to the formation of NiO in the catalyst. Furthermore,redox properties were also improved by the introduction of Mg.
作者
段言康
唐小苏
宋忠贤
熊平
宁平
张秋林
DUAN Yankang TANG Xiaosu SONG Zhongxian XIONG Ping NING Ping ZHANG Qiulin(Faculty of Environmental Science and Engineering, Kunming University of Science and Technology,Kunming 650500,China Chengdu Technological University,Teaching Affairs Officer, Chengdu 611730,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第11期6588-6592,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(21307047)
云南省人培基金资助项目(1418682)
关键词
N2O催化分解
氧化镍
催化活性
catalytic decomposition of N2O
nickel oxide
catalytic activity
