Tandem Catalysis for CO<sub>2</sub> Hydrogenation
to C<sub>2</sub>–C<sub>4</sub> Hydrocarbons
Chenlu Xie
Chen Chen
Yi Yu
Ji Su
Yifan Li
Gabor A. Somorjai
Peidong Yang
10.1021/acs.nanolett.7b01139.s001
https://acs.figshare.com/articles/journal_contribution/Tandem_Catalysis_for_CO_sub_2_sub_Hydrogenation_to_C_sub_2_sub_C_sub_4_sub_Hydrocarbons/5015642
Conversion
of carbon dioxide to C<sub>2</sub>–C<sub>4</sub> hydrocarbons
is a major pursuit in clean energy research. Despite tremendous efforts,
the lack of well-defined catalysts in which the spatial arrangement
of interfaces is precisely controlled hinders the development of more
efficient catalysts and in-depth understanding of reaction mechanisms.
Herein, we utilized the strategy of tandem catalysis to develop a
well-defined nanostructured catalyst CeO<sub>2</sub>–Pt@mSiO<sub>2</sub>–Co for converting CO<sub>2</sub> to C<sub>2</sub>–C<sub>4</sub> hydrocarbons using two metal-oxide interfaces. C<sub>2</sub>–C<sub>4</sub> hydrocarbons are found to be produced with
high (60%) selectivity, which is speculated to be the result of the
two-step tandem process uniquely allowed by this catalyst. Namely,
the Pt/CeO<sub>2</sub> interface converts CO<sub>2</sub> and H<sub>2</sub> to CO, and on the neighboring Co/mSiO<sub>2</sub> interface
yields C<sub>2</sub>–C<sub>4</sub> hydrocarbons through a subsequent
Fischer–Tropsch process. In addition, the catalysts show no
obvious deactivation over 40 h. The successful production of C<sub>2</sub>–C<sub>4</sub> hydrocarbons via a tandem process on
a rationally designed, structurally well-defined catalyst demonstrates
the power of sophisticated structure control in designing nanostructured
catalysts for multiple-step chemical conversions.
2017-05-11 00:00:00
CO 2 Hydrogenation
multiple-step chemical conversions
hydrocarbon
interface
tandem process
catalyst