Copper-ceria solid solution with improved catalytic activity for hydrogenation of CO2 to CH3OH
Copper-ceria solid solution with improved catalytic activity for hydrogenation of CO2 to CH3OH
复制标题
具有改进的 CO2 加氢成 CH3OH 催化活性的铜-二氧化铈固溶体
DOI：
10.1016/s1872-2067(20)63605-1
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发表时间：
2020-09
影响因子：
16.5
通讯作者：
Ishihara Tatsumi
中科院分区：
文献类型：
--
作者：
Yang Bin;Deng Wei;Guo Limin;Ishihara Tatsumi
制备了铜-二氧化铈固溶体和二氧化铈负载的铜催化剂，并将其用于CO2催化加氢制CH3OH。根据位点分类和定量分析（X射线衍射、拉曼光谱、X射线光电子能谱、H2程序升温还原和CO吸附），所制备的催化剂的界面分为Cu掺入二氧化铈（Cu-Ov-Cex）、分散CuO（D-CuO-CeO2）和块状CuO (B-CuO-CeO2) 位于 CeO2 表面。这些结果与活性测试结果一起表明，Cu-Ov-Cex 物种与 CO2 氢化活性密切相关，并且导致 CH3OH 产生的周转频率比 D-CuO-CeO2 和 B-CuO-CeO2 物种观察到的要高得多。因此，由于较高的 Cu-Ov-Cexfraction，铜-二氧化铈固溶体表现出改善的活性。
A copper-ceria solid solution and ceria-supported copper catalysts were prepared and used for the catalytic hydrogenation of CO2to CH3OH. According to site-specific classification and quantitative analyses (X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, H2temperature-programmed reduction, and CO adsorption), the interfaces of the prepared catalysts were classified as Cu incorporated into ceria (Cu-Ov-Cex), dispersed CuO (D-CuO-CeO2), and bulk CuO (B-CuO-CeO2) over the CeO2surface. These results, together with those of activity tests, showed that the Cu-Ov-Cexspecies was closely related to the CO2hydrogenation activity and resulted in a much higher turnover frequency of CH3OH production than that observed with the D-CuO-CeO2and B-CuO-CeO2species. Thus, the copper-ceria solid solution exhibited improved activity due to the higher Cu-Ov-Cexfraction.
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