Ruthenium-cobalt single atom alloy for CO photo-hydrogenation to liquid fuels at ambient pressures

Jiaqi Zhao, Jinjia Liu, Zhenhua Li (), Kaiwen Wang, Run Shi, Pu Wang, Qing Wang, Geoffrey I. N. Waterhouse, Xiaodong Wen and Tierui Zhang ()
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Jiaqi Zhao: Chinese Academy of Sciences
Jinjia Liu: Chinese Academy of Sciences
Zhenhua Li: Chinese Academy of Sciences
Kaiwen Wang: Beijing University of Technology
Run Shi: Chinese Academy of Sciences
Pu Wang: Chinese Academy of Sciences
Qing Wang: The University of Auckland
Geoffrey I. N. Waterhouse: The University of Auckland
Xiaodong Wen: Chinese Academy of Sciences
Tierui Zhang: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Photothermal Fischer-Tropsch synthesis represents a promising strategy for converting carbon monoxide into value-added chemicals. High pressures (2-5 MPa) are typically required for efficient C-C coupling reactions and the production of C5+ liquid fuels. Herein, we report a ruthenium-cobalt single atom alloy (Ru1Co-SAA) catalyst derived from a layered-double-hydroxide nanosheet precursor. Under UV-Vis irradiation (1.80 W cm−2), Ru1Co-SAA heats to 200 °C and photo-hydrogenates CO to C5+ liquid fuels at ambient pressures (0.1-0.5 MPa). Single atom Ru sites dramatically enhance the dissociative adsorption of CO, whilst promoting C-C coupling reactions and suppressing over-hydrogenation of CHx* intermediates, resulting in a CO photo-hydrogenation turnover frequency of 0.114 s−1 with 75.8% C5+ selectivity. Owing to the local Ru-Co coordination, highly unsaturated intermediates are generated during C-C coupling reactions, thereby improving the probability of carbon chain growth into C5+ liquid fuels. The findings open new vistas towards C5+ liquid fuels under sunlight at mild pressures.

Date: 2023
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DOI: 10.1038/s41467-023-37631-5

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