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Biomass-derived oxygen-doped hollow carbon microtubes for electrocatalytic N2-to-NH3 fixation under ambient conditions.
- Source :
- Chemical Communications; 3/4/2019, Vol. 55 Issue 18, p2684-2687, 4p
- Publication Year :
- 2019
-
Abstract
- Electrocatalytic N<subscript>2</subscript> reduction as an alternative approach to the energy-intensive and large CO<subscript>2</subscript>-producing Haber–Bosch process for NH<subscript>3</subscript> synthesis under mild conditions has attracted extensive attention. Current research efforts on N<subscript>2</subscript> reduction have mainly focused on metal-based catalysts, but metal-free alternatives can avoid the issue of metal ion release. In this work, oxygen-doped hollow carbon microtubes (O-KFCNTs) derived from natural kapok fibers are reported as a metal-free NRR electrocatalyst for N<subscript>2</subscript>-to-NH<subscript>3</subscript> conversion with excellent selectivity. In 0.1 M HCl, the O-KFCNTs achieve a high faradaic efficiency of 9.1% at −0.80 V vs. a reversible hydrogen electrode (RHE) and a NH<subscript>3</subscript> yield rate of 25.12 μg h<superscript>−1</superscript> mg<subscript>cat.</subscript><superscript>−1</superscript> at −0.85 V vs. RHE under ambient conditions. Notably, this catalyst also demonstrates high stability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13597345
- Volume :
- 55
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Chemical Communications
- Publication Type :
- Academic Journal
- Accession number :
- 134929397
- Full Text :
- https://doi.org/10.1039/c8cc09867k