MOF衍生Co-C/FeOx复合材料的制备及其催化CO_(2)还原性能探究

Preparation of MOF-derived Co-C/FeOx composite and study on its catalytic performance for CO_(2)reduction

以MOFs为模板,通过水热合成､高温煅烧制备得到Co-C/FeO_(x)复合材料,在300℃､0.2 MPa条件下探究了其对CO_(2)的催化还原性能。通过调控Co-C和FeO_(x)的质量比探究CO_(2)还原产物的分布,结果表明,当Co-C和FeO_(x)质量比为1∶4时,CO_(2)转化率为28.8%,C2H6和C_(3)H_(8)的选择性提高至28.6%。FeO_(x)的引入促进了中间体CO的生成,Co-C和FeO_(x)两者的结合使CO_(2)还原兼顾了CO_(2)转化率与C^(2+)产物的选择性。该研究不仅为CO_(2)选择性还原为多碳产物提供了一种有效策略,还展示了以MOFs为前驱体合成的碳负载金属/金属氧化物复合材料在催化中的应用潜力。

Co-C/FeO_(x)composite is prepared via hydrothermal synthesis and high temperature calcination by using MOFs as templates.Its catalytic performance for CO_(2)reduction at 300℃and 0.2 MPa is investigated.The distribution of the products from CO_(2)reduction is explored by adjusting the mass ratio of Co-C and FeO_(x)in the composite.It is found that the conversion rate of CO_(2)reaches 28.8%and the selectivity of C2H6 and C_(3)H_(8)is improved to 28.6%when the mass ratio of Co-C and FeO_(x)is 1∶4.The addition of FeO_(x)can promote the formation of CO intermediate.The combination of Co-C and FeO_(x)makes the CO_(2)reduction process take into account both the CO_(2)conversion and the selectivity of C^(2+)products.This study provides an effective strategy for the selective reduction of CO_(2)to multi-carbon products,and also discloses the application potential of carbon-supported metal/metal oxide composites synthesized with MOFs as precursors in catalysis.