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Molybdenum Oxide Supported on Ti3AlC2 is an Active Reverse Water–Gas Shift Catalyst
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-03-29 , DOI: 10.1021/acssuschemeng.0c07881 Maria Ronda-Lloret 1 , Liuqingqing Yang 2 , Michelle Hammerton 3 , Vijaykumar S. Marakatti 4 , Moniek Tromp 3 , Zdeněk Sofer 5 , Antonio Sepúlveda-Escribano 6 , Enrique V. Ramos-Fernandez 6 , Juan Jose Delgado 7 , Gadi Rothenberg 1 , Tomas Ramirez Reina 2 , N. Raveendran Shiju 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-03-29 , DOI: 10.1021/acssuschemeng.0c07881 Maria Ronda-Lloret 1 , Liuqingqing Yang 2 , Michelle Hammerton 3 , Vijaykumar S. Marakatti 4 , Moniek Tromp 3 , Zdeněk Sofer 5 , Antonio Sepúlveda-Escribano 6 , Enrique V. Ramos-Fernandez 6 , Juan Jose Delgado 7 , Gadi Rothenberg 1 , Tomas Ramirez Reina 2 , N. Raveendran Shiju 1
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MAX phases are layered ternary carbides or nitrides that are attractive for catalysis applications due to their unusual set of properties. They show high thermal stability like ceramics, but they are also tough, ductile, and good conductors of heat and electricity like metals. Here, we study the potential of the Ti3AlC2 MAX phase as a support for molybdenum oxide for the reverse water–gas shift (RWGS) reaction, comparing this new catalyst to more traditional materials. The catalyst showed higher turnover frequency values than MoO3/TiO2 and MoO3/Al2O3 catalysts, due to the outstanding electronic properties of the Ti3AlC2 support. We observed a charge transfer effect from the electronically rich Ti3AlC2 MAX phase to the catalyst surface, which in turn enhances the reducibility of MoO3 species during reaction. The redox properties of the MoO3/Ti3AlC2 catalyst improve its RWGS intrinsic activity compared to TiO2- and Al2O3-based catalysts.
中文翻译：
负载在Ti 3 AlC 2上的氧化钼是一种活性的反向水煤气变换催化剂
MAX相是层状三元碳化物或氮化物，由于其非同寻常的性能而吸引了催化应用。它们显示出像陶瓷一样的高热稳定性，但它们也像金属一样坚硬，易延展，并且是良好的热和电导体。在这里，我们研究了将Ti 3 AlC 2 MAX相作为氧化钼载体用于反向水煤气变换（RWGS）反应的潜力，并将这种新催化剂与更传统的材料进行了比较。由于Ti 3 AlC具有出色的电子性能，该催化剂的周转率比MoO 3 / TiO 2和MoO 3 / Al 2 O 3催化剂高。2支持。我们观察到了从富电子的Ti 3 AlC 2 MAX相到催化剂表面的电荷转移效应，这反过来增强了反应期间MoO 3物种的还原性。与基于TiO 2和Al 2 O 3的催化剂相比，MoO 3 / Ti 3 AlC 2催化剂的氧化还原性质提高了其RWGS固有活性。
更新日期：2021-04-12
中文翻译：
负载在Ti 3 AlC 2上的氧化钼是一种活性的反向水煤气变换催化剂
MAX相是层状三元碳化物或氮化物，由于其非同寻常的性能而吸引了催化应用。它们显示出像陶瓷一样的高热稳定性，但它们也像金属一样坚硬，易延展，并且是良好的热和电导体。在这里，我们研究了将Ti 3 AlC 2 MAX相作为氧化钼载体用于反向水煤气变换（RWGS）反应的潜力，并将这种新催化剂与更传统的材料进行了比较。由于Ti 3 AlC具有出色的电子性能，该催化剂的周转率比MoO 3 / TiO 2和MoO 3 / Al 2 O 3催化剂高。2支持。我们观察到了从富电子的Ti 3 AlC 2 MAX相到催化剂表面的电荷转移效应，这反过来增强了反应期间MoO 3物种的还原性。与基于TiO 2和Al 2 O 3的催化剂相比，MoO 3 / Ti 3 AlC 2催化剂的氧化还原性质提高了其RWGS固有活性。
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