Oxygen transport membrane (OTM) allows O²⁻ to transport from oxygen donation side to partial oxidation side without the contact of oxidant and fuel, providing an efficient pathway for the fuel conversion. OTM with high oxygen permeability are crucial for OTM‐involved processes, and the asymmetric dual‐phase OTM is one of the promising materials with desirable oxygen permeability and stability. Herein, we fabricated a Zr_0.92Y_0.08O_1.92‐La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (YSZ‐LSCF) asymmetric dual‐phase OTM for the methane partial oxidation and water splitting. It exhibits highest oxygen permeation flux of 0.151 mL cm⁻² min⁻¹ at 900 °C among all membranes due to the fast oxygen diffusion kinetic. In water splitting experiments driven by different reducing atmospheres (CO and CH₄), all the membranes are reactive. The YSZ‐LSCF asymmetric dual‐phase membrane reveals a favorable performance for the partial oxidation of methane to syngas with a H₂/CO molar ratio close to 2 and simultaneously water splitting to produce hydrogen. The membrane maintains high stability during the experiments, and the clear dual phases, grain boundaries and porous structure are visible. Owing to its desired oxygen permeability and stability, YSZ‐LSCF asymmetric dual‐phase membrane developed in the present study provides an efficient process for the methane partial oxidation and water splitting.

中文翻译：

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Zr0.92Y0.08O1.92-La0.6Sr0.4Co0.2Fe0.8O3-δ非对称双相氧气传输膜同时进行甲烷部分氧化和水分解▴

氧气传输膜（OTM）允许O ^2-从供氧侧传输到部分氧化侧，而无需氧化剂和燃料的接触，从而为燃料转化提供了有效的途径。具有高透氧性的OTM对于涉及OTM的过程至关重要，非对称双相OTM是具有理想透氧性和稳定性的有前途的材料之一。在这里，我们制造了Zr _0.92 Y _0.08 O _1.92 ‐La _0.6 Sr _0.4 Co _0.2 Fe _0.8 O _{3− δ}（YSZ-LSCF）不对称双相OTM，用于甲烷部分氧化和水分解。由于快速的氧气扩散动力学，它在所有膜中均表现出最高的氧气渗透通量，在900°C下为0.151 mL cm ^-2 min ^-1。在由不同还原气氛（CO和CH ₄）驱动的水分解实验中，所有膜都是反应性的。YSZ-LSCF不对称双相膜对甲烷部分氧化为H _2的合成气显示出良好的性能/ CO摩尔比接近2，同时水分解产生氢气。该膜在实验过程中保持高稳定性，并且可见清晰的双相，晶界和多孔结构。由于其理想的透氧性和稳定性，本研究开发的YSZ-LSCF不对称双相膜为甲烷部分氧化和水分解提供了有效的方法。