Redox Behavior of In-O-Ti Interface for Selective Hydrogenation of CO2 to CO in Doped In-TiO2 Catalyst
Redox Behavior of In-O-Ti Interface for Selective Hydrogenation of CO2 to CO in Doped In-TiO2 Catalyst
复制标题
In-O-Ti 界面在掺杂 In-TiO2 催化剂中将 CO2 选择性加氢为 CO 的氧化还原行为
DOI：
10.1002/cctc.202201348
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发表时间：
2023
期刊：
影响因子：
4.5
通讯作者：
Shrotri Abhijit
中科院分区：
文献类型：
--
作者：
Dostagir Nazmul H. Md.;Fukuoka Atsushi;Shrotri Abhijit
在CO2加氢反应中，需要在低温和高压下选择性合成CO，以将逆水煤气变换反应与费托合成集成。在这里，我们表明，通过将铟（In）掺杂到TiO 2中制备的混合氧化物催化剂产生CO，生成速率为22 μmol g−1s−1。 在350 °C和3MPa压力下，CO选择性大于99%。 此外，该催化剂在运行中耐用超过100小时。 在反应过程中，界面In3+−O−Ti4+位点首先在H2存在下被还原，然后被CO2氧化，产生CO。由于氧化还原机制，甲醇和甲烷的形成受到限制。该研究显示了用于CO2加氢的无助催化剂氧化物催化剂的开发以及氧化物界面处的氧化还原性质对于在不利条件下CO2选择性加氢为CO的重要性。
In the CO2hydrogenation reaction, selective synthesis of CO at low temperature and high pressure is needed to integrate the reverse water gas shift reaction with Fischer‐Tropsch synthesis. Here, we show that a mixed oxide catalyst prepared by doping indium (In) into TiO2produces CO with the formation rate of 22 μmol g−1s−1. The CO selectivity was more than 99 % at 350 °C and 3 MPa pressure. Moreover, the catalyst was durable for over 100 h on stream. During reaction the interfacial In3+−O−Ti4+sites were first reduced in presence of H2and then oxidized back with CO2producing CO. Because of the redox mechanism, the formation of methanol and methane was limited. This study shows the development of a promoter‐free oxide catalyst for CO2hydrogenation and the importance of the redox property at the oxide interface for selective hydrogenation of CO2to CO under unfavorable conditions.