Journal
ENERGY TECHNOLOGY
Volume 8, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.202000205
Keywords
bimetallic catalysts; direct ethanol synthesis; hydrotalcites; nickel-iron alloys; syngas
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Funding
- Natural Science Foundations of China [21872101, 21962014, 51904152]
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In view of the dual active sites mechanism of direct ethanol synthesis and the excellent catalytic performance of bimetallic catalysts, a series of Ni-Fe alloy catalysts with different Ni/Fe molar ratios derived from layered double hydroxides (LDHs) precursors are synthesized. During the calcination and reduction process of LDHs precursors, the Ni-Fe alloy is obtained, and attributed to all the elements being evenly dispersed at the atomic level in the LDHs precursors; meanwhile, a strong interaction between Ni-Fe alloy and MgAl(2)O(4)support exists. As a result, Ni-Fe alloy nanoparticles are highly dispersed on the MgAl(2)O(4)surface. The high CO adsorption ability on the Ni-Fe alloy and synergism catalysis between Ni and Fe result in excellent catalytic activity and high selectivity to ethanol on the bimetallic Ni-Fe alloy. In addition, the strong antisintering ability and stable alloy structure bring about a good catalytic stability. This research proposes a new catalytic system for direct ethanol synthesis from syngas.
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