Highly Dispersed Ni–Fe Alloy Catalysts on MgAl2O4 Derived from Hydrotalcite for Direct Ethanol Synthesis from Syngas,Energy Technology

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Highly Dispersed Ni–Fe Alloy Catalysts on MgAl2O4 Derived from Hydrotalcite for Direct Ethanol Synthesis from Syngas
Energy Technology ( IF 3.6 ) Pub Date : 2020-06-17 , DOI: 10.1002/ente.202000205
Qiang Liu _{1,

2} , Jiaming Wang _{1,

2} , Kang An _{1,

2} , Siran Zhang _{1,

2} , Guilong Liu ₃ , Yuan Liu _{1,

2}

Affiliation

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 MgAl₂O₄ support exists. As a result, Ni–Fe alloy nanoparticles are highly dispersed on the MgAl₂O₄ 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.

中文翻译：

在水滑石衍生的MgAl2O4上的高分散Ni-Fe合金催化剂，用于合成气直接合成乙醇

鉴于直接乙醇合成的双重活性位点机理和双金属催化剂的优异催化性能，合成了一系列由层状双氢氧化物（LDHs）前体衍生的具有不同Ni / Fe摩尔比的Ni-Fe合金催化剂。在LDHs前体的煅烧和还原过程中，获得了Ni-Fe合金，其归因于LDHs前体中所有元素均在原子水平上均匀分散。同时，Ni-Fe合金与MgAl ₂ O ₄载体之间存在强相互作用。结果，Ni-Fe合金纳米颗粒高度分散在MgAl ₂ O _4上表面。Ni-Fe合金具有很高的CO吸附能力以及Ni和Fe之间的协同催化作用，在双金属Ni-Fe合金上具有出色的催化活性和对乙醇的高选择性。另外，强的抗烧结能力和稳定的合金结构带来了良好的催化稳定性。这项研究提出了一种从合成气直接合成乙醇的新型催化系统。

更新日期：2020-06-17

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