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CeO2 Wetting Layer on ZrO2 Particle with Sharp Solid Interface as Highly Active and Stable Catalyst for HCl Oxidation Reaction
ACS Catalysis ( IF 11.3 ) Pub Date : 2019-10-15 00:00:00 , DOI: 10.1021/acscatal.9b03482 Yu Sun 1, 2 , Pascal Cop 2, 3 , Igor Djerdj 4 , Xiaohan Guo 1 , Tim Weber 2, 3 , Omeir Khalid 2, 3 , Yanglong Guo 1 , Bernd M. Smarsly 2, 3 , Herbert Over 2, 3
ACS Catalysis ( IF 11.3 ) Pub Date : 2019-10-15 00:00:00 , DOI: 10.1021/acscatal.9b03482 Yu Sun 1, 2 , Pascal Cop 2, 3 , Igor Djerdj 4 , Xiaohan Guo 1 , Tim Weber 2, 3 , Omeir Khalid 2, 3 , Yanglong Guo 1 , Bernd M. Smarsly 2, 3 , Herbert Over 2, 3
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Dry impregnation of CeO2 on ZrO2 particles (CeO2@ZrO2) and calcination at 600 °C for 5 h result in a highly dispersed layer of the catalytically active CeO2 phase with an enriched concentration of Ce3+. The distinct morphology of CeO2@ZrO2 is responsible for the high (specific) activity in the gas-phase oxidation of HCl (Deacon reaction). Surprisingly, the CeO2@ZrO2 catalyst calcined at 600 °C is chemically even more stable toward chlorination under harsh Deacon condition than that calcined at 900 °C, where a solid solution of ZrO2 and CeO2 is formed at the solid interface. The improved stability of the CeO2 layer calcined at 600 °C is traced to its sharp interface formed with the ZrO2 support. We expect that this kind of active and stable layer morphology of CeO2 supported on ZrO2 is beneficial for other catalytic oxidation reactions as well, either as an active component or as a supporting material for another active metal component.
中文翻译：
具有锋利的固体界面的ZrO2颗粒上的CeO2润湿层是高活性和稳定的HCl氧化反应催化剂
将CeO 2干浸渍在ZrO 2颗粒上（CeO 2 @ZrO 2）并在600°C下煅烧5 h，得到具有高浓度Ce 3+的催化活性CeO 2相的高度分散层。CeO 2 @ZrO 2的独特形态导致HCl气相氧化（迪肯反应）中的高（比）活性。出乎意料的是，在苛刻的迪肯条件下，在600°C下煅烧的CeO 2 @ZrO 2催化剂在化学上比在900°C下煅烧的ZrO 2和CeO 2固溶体在化学上甚至更稳定。在实体界面处形成。在600°C下煅烧的CeO 2层的改进的稳定性可追溯到其与ZrO 2载体形成的尖锐界面。我们期望，这种负载在ZrO 2上的CeO 2的活性和稳定层形态也对其他催化氧化反应有益，无论是作为活性组分还是作为另一种活性金属组分的载体材料。
更新日期：2019-10-16
中文翻译：
具有锋利的固体界面的ZrO2颗粒上的CeO2润湿层是高活性和稳定的HCl氧化反应催化剂
将CeO 2干浸渍在ZrO 2颗粒上（CeO 2 @ZrO 2）并在600°C下煅烧5 h，得到具有高浓度Ce 3+的催化活性CeO 2相的高度分散层。CeO 2 @ZrO 2的独特形态导致HCl气相氧化（迪肯反应）中的高（比）活性。出乎意料的是，在苛刻的迪肯条件下，在600°C下煅烧的CeO 2 @ZrO 2催化剂在化学上比在900°C下煅烧的ZrO 2和CeO 2固溶体在化学上甚至更稳定。在实体界面处形成。在600°C下煅烧的CeO 2层的改进的稳定性可追溯到其与ZrO 2载体形成的尖锐界面。我们期望，这种负载在ZrO 2上的CeO 2的活性和稳定层形态也对其他催化氧化反应有益，无论是作为活性组分还是作为另一种活性金属组分的载体材料。
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