CuO形貌对NH_(3)选择性催化氧化中活性的影响  

Effect of Morphology on Activity of CuO in NH_(3) Selective Catalytic Oxidation

作　　者：葛钰申 于艳科 要海龙 闫祯 董莉[1] 孙春鹏 GE Yu-shenu;YU Yan-ke;YAO Hai-long;YAN Zhen;DONG Li;SUN Chun-peng(Chinese Research Academy of Environmental Sciences,Beijing 100012,China;Tianjin Binhai Research Institute for Environmental Innovation,Tianjin 300450,China;School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Guoneng Biopower Group Co.,Ltd.,Beijing 100012,China)

机构地区：[1]中国环境科学研究院,北京100012 [2]天津市滨海新区环境创新研究院,天津300450 [3]西安交通大学能动学院,陕西西安710049 [4]国能生物发电集团有限公司,北京100052

出　　处：《环境科技》2023年第2期13-17,23,共6页Environmental Science and Technology

基　　金：国家自然科学基金“新型核壳结构MOFs@TiO_(2)中低温脱硝催化剂表面物化性质调控和抗硫性能研究”(21906127)。

摘　　要：采用沉淀法,通过调节海藻酸钠的使用量,成功合成纳米粒子、纳米粒子/纳米棒的混合、纳米片3种形貌的CuO,测试不同形貌CuO在NH_(3)选择性催化氧化中的活性。研究发现,CuO纳米片在3者中的活性最高,反应温度在225℃时NH_(3)转化率可以达到100%,纳米片有利于CuO表面形成更多的吸附氧物种和酸性位;CuO纳米片上的吸附氧物种质量分数为45.4%,酸位数目为253μmol/g,显著高于另外2种形貌的CuO;较多的吸附氧物种和酸性位数目使CuO纳米片在NH_(3)选择性催化氧化中显示出更高的活性。CuO with three kind of morphology was prepared by precipitation method with different amount of CgHgNaO?.The morphology was nanoparticle,mixture of nanoparticle and nanorod,nanosheet.The activity of CuO with different morphology in NH_(3) selective catalytic oxidation was measured.The activity of CuO nanosheet was the highest in three samples.NH_(3) conversion reached 100%at 225 Nanosheet would promote the formation of adsorbed oxygen species and acid sites on the surface of CuO.The content of adsorbed oxygen species on CuO nanosheet was 45.4%and the amount of acid sites was 253μmol/g,significantly higher than those on other CuO.Higher amount of adsorbed oxygen species and acid sites should be the main reason for the higher activity of CuO nanosheet in NH_(3) selective catalytic oxidation.

关 键 词：CUO NH_(3) 形貌 酸性位 氧物种 

分 类 号：X5[环境科学与工程—环境工程]