Journal
JOURNAL OF CATALYSIS
Volume 394, Issue -, Pages 236-244Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2020.06.018
Keywords
CO2 hydrogenation; In2O3; Atomically dispersed Ptn+ species
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Funding
- National Key R&D Program of China [2017YFB0702800]
- National Natural Science Foundation of China [21802139]
- Project of Key Research Plan of Ningxia [2019BDE03003]
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The methanol selectivity of In2O3 catalyst can be significantly enhanced by introducing a small amount of Pt, leading to a higher efficiency in the process of CO2 hydrogenation to methanol.
Hydrogenation of CO2 into methanol using the H-2 produced from renewable energy is a promising way for carbon capture and utilization. Therefore, the methanol synthesis catalysts with high methanol selectivity are highly desired. In this work, we found that the methanol selectivity of In2O3 catalyst can be significantly enhanced by introducing a small amount of Pt. Methanol selectivity can be increased from 72.2% (In2O3) to 91.1% (0.58 wt.% Pt/In2O3) at 220 degrees C. The introduced Pt atoms are doped into the In2O3, forming atomically dispersed Ptn+ species, most of which are stable under working conditions. It is proposed that the atomically dispersed Ptn+ species are responsible for the enhanced methanol selectivity, while Pt nanoparticles on In2O3 mainly boost the reverse water-gas shift reaction (CO2 + H-2 -> CO + H2O). (c) 2020 Elsevier Inc. All rights reserved.
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