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首页> 外文期刊>Advanced energy materials >Hydride-Enhanced CO_2 Methanation: Water-Stable BaTiO_(2.4)H_(0.6) as a New Support
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Hydride-Enhanced CO_2 Methanation: Water-Stable BaTiO_(2.4)H_(0.6) as a New Support

机译：氢化物增强的CO_2甲烷化：水稳性BaTiO_（2.4）H_（0.6）作为新载体

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摘要

Catalytic CO2 hydrogenation to CH4 provides a promising approach to producing natural gas, and reducing the emissions of global CO2. However, the efficiency of catalytic CO2 methanation is limited by slow kinetics at low temperatures. This study first demonstrates that an air- and water-stable perovskite oxyhydride BaTiO2.4H0.6 could function as an active support material for Ni-, Ru-based catalysts for CO2 methanation at 300-350 degrees C, a relatively lower temperature. With the oxyhydride support, the activity for Ni and Ru increases by a factor of 2-7 when compared to the BaTiO3 oxide support. Kinetic analysis shows reduced H-2 poisoning probably due to spillover, implying that the activity change is due to the kinetics being influenced by hydride. Furthermore, the oxyhydride-supported Ni catalyst is also durable with its catalytic performance preserved for at least 10 h under a humid environment at elevated temperatures. It is anticipated that these perovskite oxyhydrides will shed new light on the design of high-efficiency metal-based catalysts for water-involved catalytic reactions.
机译：催化CO2加氢成CH4为生产天然气和减少全球CO2排放提供了一种有前途的方法。但是，催化CO2甲烷化的效率受到低温下动力学缓慢的限制。这项研究首先证明，在300-350摄氏度（相对较低的温度）下，空气和水稳定的钙钛矿氧化物氢氧化钛BaTiO2.4H0.6可以用作Ni，Ru基催化剂用于CO2甲烷化的活性载体材料。使用氧化氢载体时，与BaTiO3氧化物载体相比，Ni和Ru的活性提高了2-7倍。动力学分析表明，H-2中毒的减少可能是由于溢出造成的，这表明活性变化是由于动力学受氢化物影响。此外，氢氧根负载的Ni催化剂也很耐用，其催化性能在潮湿环境中在升高的温度下至少可保留10小时。预计这些钙钛矿型氢氧化物将为涉及水的催化反应的高效金属基催化剂的设计提供新的思路。

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