窒素還元と水素酸化によるアンモニアの連続流電合成

Xianbiao Fu¹, Jakob B Pedersen¹, Yuanyuan Zhou¹

¹Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark.

Science (New York, N.Y.)

|February 16, 2023

まとめ

研究者は電気化学的なアンモニア合成のための連続流電解剤を開発しました. プラチナ・ゴールド合金触媒は肥料の重要な成分であるアンモニアの生産の安定性と効率を向上させました

科学分野:

電気化学
材料科学
化学工学

背景:

アンモニアは肥料,医薬品,微細化学薬品に不可欠です.
アンモニアは有望な炭素のない燃料です
リチウム媒介の窒素還元による電気化学アンモニア合成は,環境条件の合成を提供します.

研究の目的:

効率的な電気化学アンモニア合成のための連続フロー電解器を開発する.
酸化水素と結合した窒素還元過程で触媒の安定性と電解質の分解を調査する.
アンモニアの生産を最適化する

主な方法:

25cm2のガス拡散電極を備えた連続流電解器を使用した.
有機電解質における水素酸化のための研究されたプラチナおよびプラチナ金合金触媒.
窒素還元と水素酸化を組み合わせた
圧力と電流の密度を含む最適化された動作条件.

主要な成果:

プラチナ触媒は有機電解質の不安定性を示した.
プラチナ・ゴールド合金触媒は陽極電位を高め,電解質の分解を防止した.
アモニアの生産に 61 ± 1% のファラダイク効率を達成した.
-6 mA/cm2の電流密度と1バーの圧力で13 ± 1%のエネルギー効率が得られる.

結論:

開発されたプラチナ・ゴールド合金触媒の連続フロー電解機は,アンモニア合成に有効です.
プラチナ・ゴールド合金はプラチナと比較して安定性と効率性を向上させます.
この方法は,持続可能なアンモニア生産のための実行可能な経路です.

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