论文标题
区分反向水气体转移反应下基于CU的纳米结构中的动态相催化
Distinguishing Dynamic Phase Catalysis in Cu based nanostructures under Reverse Water Gas Shift Reaction
论文作者
论文摘要
增加人为二氧化碳（CO $ _2 $）的排放导致全球温度和气候变化的上升。使用含量丰富的金属氧化催化剂，例如Cu $ _2 $ O来减少CO $ _2 $通过RWGS反应，似乎是有利可图的。在这项工作中，我们使用了Cu $ _2 $ o纳米结构，并确定了其活性，稳定性和选择性，用于将CO $ _2 $减少为碳一氧化碳（CO），可以通过Fisher Tropsch合成将其进一步氢化到更高的碳氢化合物中。我们已经观察到，CO $ _2 $转化率的速率增加了4倍，并在300 C下显着下降，其中催化剂降低至金属CU，并且随着温度的进一步升高，速率略有增加。 CO $ _2 $降低的选择性主要是用痕量甲烷的CO。我们可以进一步利用Cu $ _2 $ o纳米催化剂的MIE共振特性和原位生成的氢来氢化CO $ _2 $的氢化，以增强催化剂的活性。我们可以进一步确定所需的纳米催化剂的最佳大小和形状，并使用可以有利于RWGS反应的杂化纳米结构，从而提高这些催化剂的稳定性。
Increasing anthropogenic carbon dioxide (CO$_2$) emissions have led to rising global temperatures and climate change. Using earth-abundant metal-oxide catalysts such as Cu$_2$O for reducing CO$_2$ through RWGS reaction seems lucrative. In this work, we have used Cu$_2$O nanostructures and identified its activity, stability, and selectivity for reducing CO$_2$ to carbon monoxide (CO) which can be further hydrogenated to higher hydrocarbons using Fisher Tropsch synthesis. We have observed that the rate of CO$_2$ conversion increases by 4 times and significantly drops at 300 C where the catalyst was reduced to metallic Cu and the rate increases slightly as the temperature is further increased. The selectivity of CO$_2$ reduction is majorly towards CO with a trace amount of methane. We can further exploit the Mie resonance characteristics of Cu$_2$O nanocatalysts and in-situ generation of hydrogen for hydrogenation of CO$_2$ to enhance the activity of the catalysts. We can further identify the optimum size and shape of the nanocatalysts required and use hybrid nanostructures which can favor RWGS reaction thus improving the stability of these catalysts.
