عنوان المقالة:Synthesis of ammonia directly from wet air using new perovskite oxide La0.8Cs0.2Fe0.8Ni0.2O3-δ as catalyst Synthesis of ammonia directly from wet air using new perovskite oxide La0.8Cs0.2Fe0.8Ni0.2O3-δ as catalyst
إبراهيم علي أحمد عمار | Ibrahim Ali Ahmed Amar | 12537
نوع النشر
مجلة علمية
المؤلفون بالعربي
Rong Lan, Khaled A. Alkhazmi, Ibrahim A. Amar, Shanwen Tao
المؤلفون بالإنجليزي
Rong Lan, Khaled A. Alkhazmi, Ibrahim A. Amar, Shanwen Tao
الملخص الانجليزي
Single phase perovskite oxide La0.8Cs0.2Fe0.8Ni0.2O3-δ was synthesised to be used as electrocatalyst for electrochemical synthesis of ammonia directly from wet air. It exhibits an orthorhombic structure with space group Pnma(62); a = 5.5493(5) Å, b = 7.8352(10) Å, c = 5. 5295(5) Å, V = 240.42(4) Å3. Composite made of Ce0.8Gd0.2O2-δ (CGO) and (Li,Na,K)2CO3 was used as electrolyte. An ammonia formation rate of 9.21 × 10−7 mol s−1 m−2 was obtained at 400 °C when applied a voltage of 1.4 V, while wet air (3 mol% H2O) was introduced to the single chamber reactor. This is just slightly lower than the value of 1.23 × 10−6 mol s−1 m−2 when wet N2 (3 mol% H2O) was fed under the same experimental conditions. These values are more than two orders of magnitude higher than the reported ammonia formation rates when synthesised from N2 and H2O at ∼ 600 °C. The perovskite catalyst is also low cost compared to the Ru/MgO and Pt/C catalysts in previous reports. This experiment indicates that ammonia can be directly synthesised from wet air using low-cost catalysts. This is a very promising simple technology for sustainable synthesis of ammonia in the future.
تاريخ النشر
20/03/2014
الناشر
Electrochimica Acta
رقم المجلد
123
رقم العدد
ISSN/ISBN
0013-4686
رابط DOI
https://doi.org/10.1016/j.electacta.2014.01.026
الصفحات
582-587
رابط خارجي
https://www.sciencedirect.com/science/article/pii/S0013468614000929
الكلمات المفتاحية
Electrochemical synthesis, Ammonia, Air, Water, Intermediate temperature
رجوع