Combining CO₂ Reduction with Ethane Oxidative Dehydrogenation by Oxygen-Modification of Molybdenum Carbide

Abstract

The surface properties that determine the selectivity of Mo 2 C catalysts in ethane oxidative dehydrogenation with CO 2 as a soft oxidant were investigated using a combination of pulse experiments and in-situ spectroscopic methods. Oxygen modification was discovered to be crucial for inhibiting the cleavage of the C−C bond in ethane and enhancing the production of ethylene. The addition of the Fe promoter accelerated the formation of surface oxygen species and stabilized them from reduction by ethane, leading to a shorter induction period, higher ethylene yield, and improved stability.

Recent Advances in Plasmonic Nanostructures for Enhanced Photocatalysis and Electrocatalysis

“…[ 143–145 ] Recently, dry reforming CO 2 with C 2 H 6 or C 3 H 8 to get CO and high‐value light olefins are considered promising in the field of CO 2 conversion. [ 146,147 ] In our anticipation, the catalytic activity and selectivity of these processes can also be improved by taking advantage of the LSPR effect of plasmonic materials.…”

Bimetallic-Derived Catalysts and Their Application in Simultaneous Upgrading of CO2 and Ethane

“…However, compared with the C-H bond (C 2 H 5 -H, 415 kJ mol À1 ) of ethane, cleavage of the C-C bond (CH 3 -CH 3 , 368 kJ mol À1 ) is thermodynamically favored, thereby imposing a challenge on promoting the product selectivity toward ethylene, which requires breaking the C-H bond while retaining the formed C=C bond. Recent advances in modified Cr/ Zr-based catalysts, [124][125][126] metal carbides, 18,127 MOs, 128,129 and especially bimetallic-derived catalysts 19,23,125,128,130 have demonstrated the feasibility of enhancing ethylene selectivity. However, few fundamental strategies are available to guide the development of ODHE catalysts due to their structural complexity under reaction conditions.…”

Simultaneously upgrading CO2 and light alkanes into value‐added products

“…The CO 2 ‐assisted DR and ODH of ethane have been extensively studied over a wide range of catalysts, including monometallic, bimetallic, and metal carbide catalysts 16‐19,30‐33 . The effect of oxide support has also been investigated over reducible and irreducible oxides for both DR 34 and ODH 35 .…”