文章预览
1 摘要 In-situ construction of
active structure under reaction conditions is highly desired but still remains
challenging in many important catalytic processes. Herein, we observe
structural evolution of molybdenum oxide (MoO x ) into highly
active molybdenum carbide (MoC x ) during reverse water-gas
shift (RWGS) reaction. Surface oxygen atoms in various Mo-based catalysts are
removed in H 2 -containing atmospheres and then carbon atoms can
accumulate on surface to form MoC x phase with the RWGS
reaction going on, both of which are enhanced by the presence of intercalated H
species or Pt-dopants in MoO x . The structural evolution from
MoO x to MoC x is accompanied by enhanced CO 2 conversion, which is positively correlated with the surface C/Mo ratio but
negatively with the surface O/Mo ratio. As a result, an unprecedented CO
formation rate of 7544.6 mmol·g catal -1 ·h -1 at
600 °C has been achieved over in-situ carbonized H-intercalated MoO 3 catalyst, which is even hig
………………………………
