Steam reforming (SR) is a process for converting transportation fuels into hydrogen-rich gas, which can be fed to SOFCs for on-board power supplies. Herein, we prepare Mg_xNi_1-xO (0.5<x < 0.8) with an average particle size in the range of 30.6–35.0 nm in a microfluidic system using a co-precipitation method. Ni particle size, Ni loading, and surface basicity synergistically determine the reforming performance. The Ni(40 wt%)-MgO catalyst demonstrates potential for the SR of n-dodecane, 0^# diesel of China national VI standard, methylbenzene, and methylnaphthalene. The deactivation of the catalysts with time-on-stream is mainly attributed to the sintering of Ni nanoparticles; however, it is almost independent of the negligible amount of carbon deposition. Density functional theory calculations verify that for the same active metal particle size, the energy barrier ratio of the forward to reverse reaction of the CH∗ decomposition of the catalyst is smaller with more Ni doped in the MgO.

蒸汽重整 (SR) 是一种将运输燃料转化为富含氢气的气体的过程，可将其送入 SOFC 以供车载电源使用。在此，我们使用共沉淀法在微流体系统中制备平均粒径范围为 30.6-35.0 nm 的Mg _x Ni _1-x O (0.5<x < 0.8)。Ni 粒径、Ni 负载量和表面碱度协同决定了重整性能。Ni(40 wt%)-MgO 催化剂展示了正十二烷，0 ^# SR 的潜力国六柴油、甲苯、甲基萘。随着时间的推移催化剂的失活主要归因于镍纳米颗粒的烧结；然而，它几乎不受碳沉积量的影响。密度泛函理论计算证实，对于相同的活性金属颗粒尺寸，催化剂的 CH∗ 分解的正逆反应的能量势垒比越小，MgO 中掺杂的 Ni 越多。