Pd–Ag@CeO2 Catalyst of Core–Shell Structure for Low Temperature Oxidation of Toluene Under Visible Light Irradiation,The Journal of Physical Chemistry C

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Pd–Ag@CeO2 Catalyst of Core–Shell Structure for Low Temperature Oxidation of Toluene Under Visible Light Irradiation
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-01-14 , DOI: 10.1021/acs.jpcc.8b09060
Jian Gao _{1,

2} , Zhichun Si ₁ , Yunfan Xu ₂ , Liping Liu ₂ , Yuanyuan Zhang _{1,

2} , Xiaodong Wu ₂ , Rui Ran ₂ , Duan Weng ₂

Affiliation

Heterogeneous thermocatalysis is widely used for the removal of VOCs. However, it is energy-consuming because it must operate at high temperatures. Combining thermocatalysis with photocatalysis makes it possible for the efficient abatement of VOCs at low temperatures. In this work, Pd–Ag@CeO₂ photothermal catalyst was synthesized via synthesizing ceria-coated Ag nanoparticles followed by loading Pd nanoparticles by the liquid-phase reduction method. The catalyst has a core–shell structure which induces strong electron interactions between Pd/Ag and CeO₂ and significantly improves the light harvest, charge separation and dissociative adsorption of Pd–Ag@CeO₂ in the visible region. The Pd–Ag@CeO₂ catalyst has a good catalytic performance in toluene oxidation, showing the T₅₀ of Pd–Ag@CeO₂ at only 88 °C under visible light irradiation. Finally, the possible catalytic mechanism has also been proposed for the oxidation of toluene under visible light irradiation.

中文翻译：

可见光照射下甲苯低温氧化的核壳结构Pd-Ag @ CeO ₂催化剂

非均相热催化广泛用于去除VOC。但是，由于它必须在高温下运行，因此非常耗能。将热催化与光催化相结合，可以在低温下有效减少VOC。在这项工作中，通过合成包覆二氧化铈的Ag纳米粒子，然后通过液相还原法负载Pd纳米粒子，来合成Pd-Ag @ CeO ₂光热催化剂。该催化剂具有核-壳结构，可引起Pd / Ag与CeO ₂之间的强电子相互作用，并显着改善可见区Pd-Ag @ CeO ₂的光吸收，电荷分离和解离吸附。Pd–Ag @ CeO ₂催化剂在甲苯氧化中具有良好的催化性能，在可见光照射下，Pd-Ag @ CeO ₂的T ₅₀仅在88°C下显示。最后，还提出了在可见光照射下甲苯氧化的可能的催化机理。

更新日期：2019-01-15

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