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ZrO2/C Nanosphere Enables High‐Efficiency Nitrogen Reduction to Ammonia at Ambient Conditions

Von Wiley-VCH zur Verfügung gestellt

ZrO2/C as a metal-saving NRR catalyst with large specific surface area and porous structure can achieve a Faradaic efficiency of 11.86 % and a NH3 yield rate of 10.72 μg h−1 mg−1cat. cat at −0.6 V vs. the reversible hydrogen electrode in 0.1 M Na2SO4.


Abstract

Electrochemical synthesis of ammonia via nitrogen reduction reaction is a rational route to save energy and relieve pollution compared to the traditional Haber-Bosch process. In this report, ZrO2 nanosphere derived from thermolysis of Zr-based biphenyl-4,4′-dicarboxylic acid MOFs (ZrO2/C) as a non-noble metal catalyst with large specific surface area and porous structure is proposed to fix nitrogen to ammonia at ambient conditions. Such catalyst achieves Faradaic efficiency of 11.86 % and a NH3 yield rate of 10.72 μg h−1 mg−1 cat. at −0.6 V vs. the reversible hydrogen electrode in 0.1 M Na2SO4. First-principles calculations confirm the alternating reaction at the catalyst surface.

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