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Ambient ammonia production via electrocatalytic nitrite reduction catalyzed by a CoP nanoarray.
- Source :
- Nano Research; Feb2022, Vol. 15 Issue 2, p972-977, 6p
- Publication Year :
- 2022
-
Abstract
- Industrial-scale ammonia (NH<subscript>3</subscript>) production mainly relies on the energy-intensive and environmentally unfriendly Haber-Bosch process. Such issue can be avoided by electrocatalytic N<subscript>2</subscript> reduction which however suffers from limited current efficiency and NH<subscript>3</subscript> yield. Herein, we demonstrate ambient NH<subscript>3</subscript> production via electrochemical nitrite (NO<subscript>2</subscript><superscript>−</superscript>) reduction catalyzed by a CoP nanoarray on titanium mesh (CoP NA/TM). When tested in 0.1 M PBS (pH = 7) containing 500 ppm NO<subscript>2</subscript><superscript>−</superscript>, such CoP NA/TM is capable of affording a large NH<subscript>3</subscript> yield of 2,260.7 ± 51.5 µg·h<superscript>−1</superscript>·cm<superscript>−2</superscript> and a high Faradaic efficiency of 90.0 ± 2.3% at −0.2 V vs. a reversible hydrogen electrode. Density functional theory calculations reveal that the potential-determining step for NO<subscript>2</subscript><superscript>−</superscript> reduction over CoP (112) is *NO<subscript>2</subscript> → *NO<subscript>2</subscript>H. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19980124
- Volume :
- 15
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Nano Research
- Publication Type :
- Academic Journal
- Accession number :
- 154042970
- Full Text :
- https://doi.org/10.1007/s12274-021-3583-9