Synthesis of ammonia directly from wet air at intermediate temperature
Synthesis of ammonia directly from wet air at intermediate temperature
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DOI：
10.1016/j.apcatb.2014.01.037
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发表时间：
2014-06-25
影响因子：
22.1
通讯作者：
Tao, Shanwen
中科院分区：
文献类型：
--
作者：
Lan, Rong;Alkhazmi, Khaled A.;Tao, Shanwen
首次在中温条件下从湿空气中直接合成氨。采用Ce0.8Gd0.2O2-Delta(CGO)-(Li，Na，K)(2)CO3电解液和新型钙钛矿型氧化物Pr0.6Ba0.4Fe0.8Cu0.2O3Delta用于氨的电化学合成。在400℃、1.4V电压下，在单室反应器中通入湿空气时，生成氨速率为1.07×10~(-6)摩尔S(-1)m~(-2)。这仅略低于相同实验条件下加湿N-2时的1.83×10~(-6)摩尔S(-1)m(-2)。这些值比报道的在接近600℃的温度下由氮气和水合成的氨生成率高出两到三个数量级。与以前报道的Ru/MgO和Pt/C催化剂相比，钙钛矿型催化剂的成本也较低。(C)2014爱思唯尔B.V.保留所有权利。
For the first time, ammonia has been directly synthesised from wet air at intermediate temperature. Ce0.8Gd0.2O2-delta (CGO)-(Li,Na,K)(2)CO3 electrolyte together with a new perovskite oxide Pr0.6Ba0.4Fe0.8Cu0.2O3_(delta) were used for electrochemical synthesis of ammonia. An ammonia formation rate of 1.07 x 10(-6) mol s(-1) m(-2) was obtained at 400 degrees C when applied a voltage of 1.4V, while wet air was introduced to the single chamber reactor. This is just slightly lower than the value of 1.83 x 10(-6) mol s(-1) m(-2) when wet N-2 was fed under the same experimental conditions. These values are two to three orders of magnitude higher than the reported ammonia formation rates when synthesised from N2 and H2O at similar to 600 degrees C. The perovskite catalysts are also low cost compared to the Ru/MgO and Pt/C catalysts in previous reports. (c) 2014 Elsevier B.V. All rights reserved.