Restrictive nanoreactor for growth of transition metal oxides (MnO2, Co3O4, NiO) nanocrystal with enhanced catalytic oxidation activity

Restrictive nanoreactor for growth of transition metal oxides (MnO2, Co3O4, NiO) nanocrystal with enhanced catalytic oxidation activity
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用于生长具有增强催化氧化活性的过渡金属氧化物(MnO2、Co3O4、NiO)纳米晶体的限制性纳米反应器

DOI:
10.1016/j.catcom.2015.09.034
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发表时间:
2015-12
影响因子:
3.7
通讯作者:
Chen Yunfa
Chen Yunfa
中科院分区:
化学3区
文献类型:
--
作者:
Tang Wenxiang;Deng Yuzhou;Li Wenhui;Li Shuangde;Wu Xiaofeng;Chen Yunfa

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在限制性纳米反应器存在和不存在的情况下,通过控制金属盐前驱体的分解来制备MnO2、Co3O4和NiO等金属氧化物。硬模板(纳米铸造)提供的限制性空间抑制了氧化物晶体的生长,使催化剂具有较小的晶粒尺寸、较高的比表面积和较好的低温还原性。结果表明,纳米铸造法制备的氧化物(MnO2、Co3O4和NiO)对苯的催化氧化性能明显优于普通煅烧法制备的氧化物,其T90%分别在289、253和355 °C下,比普通煅烧法制备的氧化物低125、41和61 °C。
Metal oxides like MnO2, Co3O4and NiO were fabricated by controlling decomposition of metal salt precursor in the presence and absence of restrictive nanoreactor. The growth of oxide crystals was inhibited in restrictive space provided by hard template (nanocasting), which made the catalysts possess smaller crystal size, higher surface area and better low-temperature reducibility. Significantly, nanocasting-derived oxides (MnO2, Co3O4and NiO) performed much better for catalytic total oxidation of benzene with T90% at 289, 253 and 355 °C, which are 125, 41 and 61 °C lower than that over the general oxides prepared by direct calcination.
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