In this work, the δ%Y–10%Co/MA (δ = 0, 1, 2, 3, and 5 wt%) catalysts synthesised by sequential incipient wetness impregnation were characterised and evaluated in CH₄ dry reforming. Superior catalytic performances were shown by 3 wt% Y₂O₃ loading (CH₄ conversion = 85.8%, and CO₂ conversion = 90.5%), followed by 2 wt% > 5 wt% > 1 wt% > 0 wt% Y₂O₃ loading. This result was attributed to the favorable catalytic properties of 3 wt%Y–10%Co/MA including small Co particle size, high Co dispersion, high amount of atomic ratio (Co/Al), and high number of lattice oxygen vacancies. The excess Y₂O₃ addition (>3 wt%) led to inevitably blocked Co active sites and resulted in decreasing catalytic performance. The 3 wt% Y₂O₃ promoter loading recorded the lowest carbon deposited (7.0%) due to the highest oxygen vacancies (78.1%) compared to 1, 2 and 5 wt% Y₂O₃.

在这项工作中，通过CH ₄干重整表征并评估了通过顺序初期湿润浸渍法合成的δ％Y-10％Co / MA（δ= 0、1、2、3和5 wt％）催化剂。通过以3 wt％的Y ₂ O ₃负载量（CH ₄转化率= 85.8％，CO ₂转化率= 90.5％）显示出优异的催化性能，其次是2 wt％> 5 wt％> 1 wt％> 0 wt％Y ₂ O ₃加载。该结果归因于3 wt％Y-10％Co / MA的良好催化性能，包括小Co粒径，高Co分散度，高原子比（Co / Al）和大量晶格氧空位。多余的Y ₂ O ₃添加（＞ 3wt％）导致不可避免地封闭Co活性位点并导致催化性能下降。与1、2和5 wt％的Y ₂ O ₃相比，由于最高的氧空位（78.1％），3 wt％的Y ₂ O ₃助催化剂负载量记录了最低的碳沉积（7.0％）。