Electrochemical Nitrate Reduction to Ammonia using γ-Fe2O3/BCN in a Neutral Medium

IF 13.1 1区 化学 Q1 CHEMISTRY, PHYSICAL
Soniya Mariya Varghese, Anju Vakakuzhiyil Gopinathan, Sudhin Rathnakumaran, Suraj Sasikumar, Sooraj Kunnikuruvan* and Ranga Rao Gangavarapu*, 
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Abstract

Electrochemical reduction of nitrate, which is a widespread pollutant, offers an alternate approach for the ammonia synthesis. Developing a stable catalyst that can selectively reduce nitrate to ammonia in a neutral medium is considered in this study. An active catalyst based on iron oxide supported on boron carbon nitride (γ-Fe2O3/BCN) is developed. The catalyst shows a Faradaic efficiency of 95% (at −0.59 V vs RHE) and yield rate of 7570 μg h–1 mgcat–1 (at −0.64 V vs RHE) of ammonia. The γ-Fe2O3/BCN catalyst also exhibits long-term stability in cyclic tests. The computational studies reveal that the charge transfer between γ-Fe2O3 and BCN in γ-Fe2O3/BCN has a critical role in enhancing the catalytic activity as compared to γ-Fe2O3 and BCN.

Abstract Image

中性介质中γ-Fe2O3/BCN电化学还原硝酸盐制氨
硝酸盐是一种广泛存在的污染物,它的电化学还原为氨合成提供了一种替代方法。本研究考虑开发一种稳定的催化剂,可以在中性介质中选择性地将硝酸盐还原为氨。研制了一种硼碳氮负载型氧化铁活性催化剂(γ-Fe2O3/BCN)。在- 0.59 V / RHE条件下,催化剂的法拉第效率为95%,氨的产率为7570 μg - 1 mgcat-1 (- 0.64 V / RHE条件下)。γ-Fe2O3/BCN催化剂在循环试验中也表现出长期稳定性。计算研究表明,与γ-Fe2O3和BCN相比,γ-Fe2O3/BCN中γ-Fe2O3和BCN之间的电荷转移对提高催化活性起关键作用。
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来源期刊
ACS Catalysis
ACS Catalysis CHEMISTRY, PHYSICAL-
CiteScore
20.80
自引率
6.20%
发文量
1253
审稿时长
1.5 months
期刊介绍: ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.
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