Strong Oxide–Support Interactions Accelerate Selective Dehydrogenation of Propane by Modulating the Surface Oxygen,ACS Catalysis

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Strong Oxide–Support Interactions Accelerate Selective Dehydrogenation of Propane by Modulating the Surface Oxygen
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-08-21 , DOI: 10.1021/acscatal.0c02782
Hai Wang ₁ , Hang Zhou ₁ , Shuqiang Li ₂ , Xin Ge ₃ , Liang Wang ₁ , Zhu Jin ₄ , Chengtao Wang ₄ , Jiabi Ma ₂ , Xuefeng Chu ₅ , Xiangju Meng ₄ , Wei Zhang _{3,

6,

7} , Feng-Shou Xiao _{1,

4}

Affiliation

The catalytic selectivity of supported catalysts can be tuned by the appropriate design of synthesis strategies and catalyst structures. We provide a persuasive strategy to turn manganese oxide from a combustion catalyst into a selective catalyst for oxidative dehydrogenation of propane (ODHP). This success is achieved by anchoring amorphous manganese oxide with thin-layer morphology on a ceria support via constructing strong oxide–support interactions (SOSIs). Multiple structure and mechanism investigations demonstrate that the SOSI forms active interfacial oxygen sites for propane activation and oxygen-deficient manganese oxide to stabilize propene and hinder overoxidation under the ODHP conditions. These features boost the ODHP to exhibit simultaneously high activity and propene selectivity, outperforming the general manganese oxide catalysts and even the practically promising vanadium catalysts. This research work deepens remarkably the structure–performance relationship understanding of metal oxide catalysts in ODHP.

中文翻译：

强氧化物-支持相互作用通过调节表面氧加速丙烷的选择性脱氢

可以通过合成策略和催化剂结构的适当设计来调节负载型催化剂的催化选择性。我们提供了一种有说服力的策略，可以将氧化锰从燃烧催化剂转变为用于丙烷氧化脱氢（ODHP）的选择性催化剂。通过将具有薄层形态的无定形锰氧化物通过建立牢固的氧化物-支持相互作用（SOSI）。多种结构和机理研究表明，在ODHP条件下，SOSI形成了用于丙烷活化的活性界面氧位和缺氧的氧化锰，以稳定丙烯并阻止过氧化。这些特征增强了ODHP，使其同时显示出高活性和丙烯选择性，胜过普通的锰氧化物催化剂，甚至甚至是有前景的钒催化剂。这项研究工作显着加深了ODHP中金属氧化物催化剂对结构-性能关系的理解。

更新日期：2020-09-20

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