Boosting Toluene Combustion by Tuning Electronic Metal-Support Interactions in In Situ Grown Pt@Co3O4 Catalysts
Boosting Toluene Combustion by Tuning Electronic Metal-Support Interactions in In Situ Grown Pt@Co3O4 Catalysts
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DOI：
10.1021/acs.est.1c07016
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发表时间：
2021-12-23
影响因子：
11.4
通讯作者：
Ge, Maofa
中科院分区：
文献类型：
--
作者：
Xiao, Menglan;Yu, Xiaolin;Ge, Maofa
电子金属-载体相互作用（EMSI）在挥发性有机化合物（VOC）减排方面引起了人们的广泛关注。在此，通过金属有机骨架（MOF）原位生长方法制备了 Pt@Co3O4 催化剂，以促进甲苯降解。 EMSI 效应诱导从 Co3O4 到 Pt 物质的部分电子转移，产生富电子的 Pt 和 Co3+ 物质。亲电子的O-2分子可以通过从富电子的Pt物种中获取电子而被激活，形成亲核氧物种，这有利于攻击甲苯中的C-H键。由于强EMSI，催化剂的氧化还原能力和表面氧活性得到提高。正如预期的那样，获得了优异的甲苯活性，同时表现出令人满意的耐水性和甲苯燃烧的长期稳定性。原位漫反射红外傅里叶变换光谱结果表明，表面晶格氧物种应深度参与甲苯降解，并且可以被气态氧有效补充。该工作可能为探索VOCs电子传递效应与高效催化性能之间的关系提供新思路。
Electronic metal-support interaction (EMSI) has attracted great attention in volatile organic compound (VOC) abatement. Herein, Pt@Co3O4 catalysts were prepared via a metal-organic framework (MOF) in situ growth approach to boost toluene degradation. The partial electron transfer from Co3O4 to Pt species was induced by the EMSI effect to generate the electron- rich Pt and Co3+ species. The electrophilic O-2 molecules could be activated by picking up the electrons from electron-rich Pt species to form nucleophilic oxygen species, which is conducive to attack C-H bonds in toluene. The redox ability and surface oxygen species activity of catalysts were improved due to strong EMSI. As expected, the excellent toluene activity was achieved, meanwhile exhibiting satisfactory water resistance and long-term stability for toluene combustion. In situ diffuse reflectance infrared Fourier transform spectroscopy results elucidated that surface lattice oxygen species should deeply participate in toluene degradation, which could be efficiently replenished by gaseous oxygen. This work may provide a new idea for exploring the relationship between the electron transfer effect and efficient catalytic performance of VOCs.