Confinement of Intermediates in Blue TiO2 Nanotube Arrays Boosts Reaction Rate of Nitrogen Electrocatalysis,ChemCatChem

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Confinement of Intermediates in Blue TiO2 Nanotube Arrays Boosts Reaction Rate of Nitrogen Electrocatalysis
ChemCatChem ( IF 3.8 ) Pub Date : 2020-03-09 , DOI: 10.1002/cctc.202000006
Jianfang Zhang _{1,

2} , Yujing Tian ₁ , Tianyu Zhang ₁ , Zhengyuan Li ₁ , Xiaojie She ₁ , Yucheng Wu ₂ , Yan Wang ₂ , Jingjie Wu ₁

Affiliation

Electrocatalytic nitrogen reduction reaction (NRR) is a complementary route to the traditional Haber‐Bosch process. Boosting the reaction kinetics of electrocatalytic NRR is key to promote the NH₃ yield. Herein, we demonstrate that the confinement of reactive intermediates (e. g., *N₂) in highly ordered blue TiO₂ nanotubes (b‐TiO₂) can significantly enhance the surface reaction rate of electrocatalytic NRR on the encapsulated metal oxide catalysts. The enhancement of the reaction rate of NH₃ synthesis is attributed to the increased surface coverage of intermediates inside the b‐TiO₂ nanotubes. Benefiting from the confinement effect of intermediates, the b‐TiO₂ nanotubes enclosing metal oxide electrodes show both higher production rate and Faradaic efficiency of NH₃ than the combined ones of individual metal oxide and b‐TiO₂ electrodes.

中文翻译：

蓝色TiO2纳米管阵列中中间体的限制提高了氮电催化的反应速率。

电催化氮还原反应（NRR）是传统Haber-Bosch工艺的补充途径。提高电催化NRR的反应动力学是提高NH ₃收率的关键。在本文中，我们表明，反应中间体的约束（例如，* N ₂）在高度有序的蓝色的TiO ₂纳米管（B-的TiO ₂）可以显著加强对包封的金属氧化物催化剂的电催化NRR的表面反应速率。NH ₃合成反应速率的提高归因于b-TiO ₂纳米管内部中间体的表面积增加。得益于中间体b‐TiO ₂的封闭作用与单独的金属氧化物电极和b-TiO ₂电极的组合电极相比，包围金属氧化物电极的纳米管显示出更高的生产率和NH _3的法拉第效率。

更新日期：2020-03-09

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