Ni/Ce_xZr_1−xO₂ catalysts were synthesized with two types of Ce_xZr_1−xO₂ solid solutions to understand the role of oxygen vacancy in ethanol steam reforming (ESR). The cubic Ce_0.93Zr_0.07O₂ (CZ) contained more oxygen vacancies on the surface and in the lattice structure than the tetragonal Ce_0.07Zr_0.93O₂ (ZC). Even though the Ni-Ce_xZr_1−xO₂ interaction basically increased the surface oxygen vacancy (OV_S) on the interfacial region, it also induced different bulk oxygen vacancy (OV_b) behavior: no OV_b over Ni/ZC and no change over Ni/CZ. In the ESR, active oxygen species (O_x) generated on the OV_S simultaneously involved SR, and water gas shift reaction (WGS) to produce H₂. Zero OV_b over Ni/ZC influenced the O_x involving–reaction routes, resulting in the limitation of WGS and the high TOF values at 750 °C. Furthermore, since the OV_b played a significant role as the O_x carrier, Ni/CZ showed the highest H₂ production rate in the ESR at 750 °C.

_{用两种类型的 Ce x} Zr _1−x O ₂固溶体合成了Ni/Ce _x Zr _1−x O ₂催化剂，以了解氧空位在乙醇蒸汽重整 (ESR) 中的作用。立方Ce _0.93 Zr _0.07 O _{2 (CZ)比四方Ce 0.07} Zr _0.93 O ₂ (ZC)在表面和晶格结构中含有更多的氧空位。尽管 Ni-Ce _x Zr _1−x O ₂相互作用基本上增加了表面氧空位 (OV _S) 在界面区域，它还引起不同的体积氧空位 (OV _b ) 行为：Ni/ZC 上没有 OV _b，Ni/CZ 上没有变化。在 ESR 中， OV _S上产生的活性氧 (O _x )同时参与 SR 和水煤气变换反应 (WGS) 以产生 H ₂。Ni/ZC 上的零 OV _b影响了涉及 O _x的反应路线，导致 WGS 的限制和 750 °C 下的高 TOF 值。此外，由于 OV _{b作为 O x}载体发挥了重要作用，因此 Ni/CZ 在 750 °C 的 ESR 中显示出最高的 H ₂生成率。