Comparative study on properties of Pd-Ce-Zr catalysts synthesized by flame spray pyrolysis and solution combustion: Application for methane catalytic oxidation in electric field
Comparative study on properties of Pd-Ce-Zr catalysts synthesized by flame spray pyrolysis and solution combustion: Application for methane catalytic oxidation in electric field
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DOI：
10.1016/j.apsusc.2021.150536
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发表时间：
2021-11
影响因子：
6.7
通讯作者：
Xuteng Zhao;Yinan Wang;Zuwei Zheng;Yiran Zhang;Ke Li;Ting Chen;Dongdong Guo;H. Cao;
中科院分区：
文献类型：
--
作者：
Xuteng Zhao;Yinan Wang;Zuwei Zheng;Yiran Zhang;Ke Li;Ting Chen;Dongdong Guo;H. Cao;
采用火焰喷雾热分解法（FSP）制备了Pd 0. 01 Ce 0. 75 Zr 0. 25 O2-F纳米空心球，并将其用于电场作用下的甲烷氧化反应。与溶液燃烧法合成的样品相比，Pd0.01Ce0.75Zr0.25O2-F催化剂表面暴露出更多的Pd活性位，表现出更高的氧化还原性能。Pd0.01Ce0.75Zr0.25O2-F催化剂的甲烷转化率较高（5 mA电场下T50= 320 °C，GHSV = 50，000 ml·g-1·h-1），转化频率（TOF）显著提高（ΔTOF = 4.33 × 10-4× s-1）。Pd0.01Ce0.75Zr0.25O2-F表面的表面羟基含量较高，电场与Ce-Zr亚稳结构之间存在较强的相互作用。
A kind of Pd0.01Ce0.75Zr0.25O2hollow nanospheres surrounded by small nanoparticles prepared by flame spray pyrolysis (FSP) method (Pd0.01Ce0.75Zr0.25O2-F) were used for methane oxidation in electric field. Compared with the samples synthesized by solution combustion method, more Pd active sites is exposed to Pd0.01Ce0.75Zr0.25O2-F catalyst surface and it shows higher redox performance. The methane conversion over Pd0.01Ce0.75Zr0.25O2-F is higher (T50= 320 °C in 5 mA electric field, GHSV = 50,000 ml·g−1·h−1), and the turnover frequency (TOF) is significantly increased (ΔTOF = 4.33 × 10-4× s−1) under the effect of electric field. There is a strong interaction between electric field and Ce-Zr metastable structure, which is due to the higher content of surface hydroxyl groups on Pd0.01Ce0.75Zr0.25O2-F surface.