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FeS2@TiO2 nanobelt array enabled high-efficiency electrocatalytic nitrate reduction to ammonia.
- Source :
- Journal of Materials Chemistry A; 12/14/2022, Vol. 10 Issue 46, p24462-24467, 6p
- Publication Year :
- 2022
-
Abstract
- Nitrate (NO<subscript>3</subscript><superscript>−</superscript>), which exists in both surface water and underground water, is harmful to the environment and human body. Ammonia (NH<subscript>3</subscript>) is a kind of necessary produced chemical for industry and daily life. Electrochemical NO<subscript>3</subscript><superscript>−</superscript> reduction can eliminate hazardous NO<subscript>3</subscript><superscript>−</superscript> and produce value-added NH<subscript>3</subscript> at the same time under ambient conditions but requires efficient catalysts for the NO<subscript>3</subscript><superscript>−</superscript> reduction reaction (NO<subscript>3</subscript>RR) with high selectivity. Herein, we report on the development of FeS<subscript>2</subscript> nanoparticles on TiO<subscript>2</subscript> nanobelt array (FeS<subscript>2</subscript>@TiO<subscript>2</subscript>) as an earth-abundant NO<subscript>3</subscript>RR electrocatalyst. It shows superior electrocatalytic performance with a large NH<subscript>3</subscript> yield of 860.3 μmol h<superscript>−1</superscript> cm<superscript>−2</superscript> at −0.7 V and a high faradaic efficiency of 97.0% at −0.4 V versus reversible hydrogen electrode in 0.1 M NaOH with 0.1 M NO<subscript>3</subscript><superscript>−</superscript>. The theoretical calculations reveal the mechanisms of the enhanced NO<subscript>3</subscript>RR performance of FeS<subscript>2</subscript>@TiO<subscript>2</subscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 10
- Issue :
- 46
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 160486664
- Full Text :
- https://doi.org/10.1039/d2ta07475c