A series of bimetallic Ni–Co catalysts supported on Mn–Al oxide with different Ni/Co molar ratios were synthesized using a sol–gel method and applied for CO hydrogenation to higher alcohols. The physical and chemical properties of the as-prepared catalysts were investigated by various characterization methods such as XRD, N₂ adsorption/desorption, H₂-TPR, TEM, XPS, CO-TPD, H₂-TPD, and CO-TPSR. The results indicated that a stronger interaction between Ni and Co ions led to the formation of a Ni–Co alloy in the reduced catalysts, and CO conversion and alcohol selectivity changed depending on the Ni/Co molar ratio that significantly influenced the properties of the catalysts. The appropriate Ni/Co molar ratio can improve the reducibility, increase the amount of non-dissociated CO on the catalyst surface for CO insertion, and enhance the catalytic performance for higher alcohol synthesis. In particular, a Ni/Co molar ratio of 5/3 was found to be the most suitable for the physical–chemical and catalytic properties of the bimetallic Ni–Co catalysts for CO hydrogenation to higher alcohols.

中文翻译：

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负载在Mn-Al氧化物上的双金属Ni-Co催化剂，用于将CO选择性催化加氢成高级醇†

使用溶胶-凝胶法合成了负载在具有不同Ni / Co摩尔比的Mn-Al氧化物上的一系列双金属Ni-Co催化剂，并将其用于CO加氢成高级醇。通过各种表征方法，如XRD，N ₂吸附/解吸，H ₂ -TPR，TEM，XPS，CO-TPD，H ₂，研究了所制备催化剂的物理和化学性质。-TPD和CO-TPSR。结果表明，Ni和Co离子之间更强的相互作用导致在还原的催化剂中形成Ni-Co合金，并且CO转化率和醇的选择性随Ni / Co摩尔比的变化而变化，这大大影响了催化剂的性能。 。适当的Ni / Co摩尔比可以改善还原性，增加用于插入CO的催化剂表面上未离解的CO的量，并增强用于高级醇合成的催化性能。特别是，发现Ni / Co摩尔比为5/3最适合用于CO加氢为高级醇的双金属Ni-Co催化剂的物理化学和催化性能。