CO2-tolerant Ni-La5.5WO11.25-δ dual-phase membranes with enhanced H2 permeability

Tuning the two phases ratio by nonmetal ion doping in dual‐phase mixed‐conductive ceramic membranes

“…Compared to the parent BCFe membrane, the partial conductivity of protons and electrons of the representative BFCeP 0.05 was slightly decreased after the partial substitution of Fe site with P (Figure S12a). The total conductivity increases from 100 to 600 • C through both P-free BCFe and representative P-doped BCFeP 0.05 membranes, presenting a p-type semi-conductivity, and there exists a transition at high temperatures around 600 • C due to the reduction of 52 Ni-BCTZ, 53 LWMF0.05, 48 Ni-LWO40, 54 Pt|LWNM, 49 Pd|BCFZY|Pd, 55 BCZYYbNi. 17 Ce 4+ to Ce 3+ or Fe 3+ to Fe 2+ , leading to a decreased total conductivity.…”

“…(B) hydrogen (H 2 ) permeation fluxes through a 500 μm thick BCFeP 0.05 membrane under four reducing conditions; (C) Long‐term stability test of the BCFeP x ( x = 0, 0.05) membranes at 950°C with sweep gas as wet Ar; (D) long‐term stability test of the 0.5 mm BCFeP 0.05 membrane compared to that of the state‐of‐the‐art mixed protonic‐electronic conductor (MPEC) membranes. Note : LWM04 hollow‐fiber, 52 Ni‐BCTZ, 53 LWMF0.05, 48 Ni‐LWO40, 54 Pt|LWNM, 49 Pd|BCFZY|Pd, 55 BCZYYbNi 17 …”

Rare Earth Tungstate: One Competitive Proton Conducting Material Used for Hydrogen Separation: A Review

“…Xie et al fabricated a cermet dual-phase membrane, Ni-La 5.5 WO 11.25−δ . The membrane had high ambipolar conductivity, and the hydrogen permeation flux at 1000 • C reached 0.18 mL•min −1 •cm −2 , which was one order of magnitude higher than that of the La 5.5 WO 11.25−δ single-phase membrane [82]. Bespalko et al prepared a Cu 0.5 Ni 0.5 -La 5.5 WO 11.25−δ cermet asymmetric membrane via hot pressing techniques.…”

Development and application of lanthanum tungstate series proton conductors

“…Zayas-Rey 等人 [44] 通过在 LWO 电解质和电极之间沉积一层 图 5 (网络版彩色)在不同温度下，分别以空气和 5%H 2 /Ar 为氧化剂和燃料，电池电压 和功率密度随电流密度的变化曲线 [44] Figure 5 (Color online) Cell voltage and power density curves as a function of the current density at different temperatures, using air and 5% H 2 /Ar as oxidant and fuel respectively [44] 图 6 (网络版彩色)阳极支撑结构示意图。(a) BZY 单层电池，(b) BZY|LWO 双层电池 [46] Figure 6 (Color online) Schematics of the structures of the anode-supported. (a) BZY monolayer cell and (b) BZY|LWO bilayer cell [46] A c c e p t e d 图 7 双相金属陶瓷膜氢渗透过程示意图 [50] Figure 7 Schematic of the hydrogen permeation process through the dual-phase cermet membrane [50] 总体而言，氢气分离膜是 LWO 系列材料的一项重要应用，现阶段的主要任务是 通过掺杂、膜复合等手段提高材料的电子导电性和化学稳定性，但若要达到商业化应 用，仍需开发新型制备方法，进一步提高分离膜的氢气通量. However, the hydrogen permeability of LWO is not satisfactory because of the low electronic conductivity.…”