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Title: Synthesis, surface chemistry and pseudocapacitance mechanisms of VN nanocrystals derived by a simple two-step halide approach

Abstract

Chloroamide precursors generated via a simple two-step ammonolysis reaction of transition metal chloride in the liquid phase at room temperature were heat treated in ammonia at moderate temperature to yield nano-sized VN crystallites. Grain growth inhibited by lowering the synthesis temperature (≈400°C) yielded agglomerated powders of spherical crystallites of cubic phase of VN with particle sizes as small as 6nm in diameter. X-ray diffraction, FTIR, mass spectroscopy (MS), and nuclear magnetic resonance (NMR) spectroscopy assessed the ammonolysis and nitridation reaction of the VCl 4-NH 3 system. X-ray Rietveld refinement, the BET technique and high-resolution transmission microscopy (HRTEM), energy dispersive x-ray (EDX) and thermogravimetric analysis (TGA) helped assess the crystallographic and microstructural nature of the VN nanocrystals. The surface chemistry and redox reaction leading to the gravimetric pseudo-capacitance value of (≈855 F/g) measured for the VN nanocrystals was determined and validated using FTIR, XPS and cyclic voltammetry analyses.

Authors:
ORCiD logo; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1455260
Report Number(s):
PNNL-SA-129110
Journal ID: ISSN 0921-5107; TE1400000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Science and Engineering. B, Solid-State Materials for Advanced Technology; Journal Volume: 230; Journal Issue: C
Country of Publication:
United States
Language:
English

Citation Formats

Choi, Daiwon, Jampani, Prashanth H., Jayakody, J. R. P., Greenbaum, Steven G., and Kumta, Prashant N.. Synthesis, surface chemistry and pseudocapacitance mechanisms of VN nanocrystals derived by a simple two-step halide approach. United States: N. p., 2018. Web. doi:10.1016/j.mseb.2017.12.017.
Choi, Daiwon, Jampani, Prashanth H., Jayakody, J. R. P., Greenbaum, Steven G., & Kumta, Prashant N.. Synthesis, surface chemistry and pseudocapacitance mechanisms of VN nanocrystals derived by a simple two-step halide approach. United States. doi:10.1016/j.mseb.2017.12.017.
Choi, Daiwon, Jampani, Prashanth H., Jayakody, J. R. P., Greenbaum, Steven G., and Kumta, Prashant N.. Sun . "Synthesis, surface chemistry and pseudocapacitance mechanisms of VN nanocrystals derived by a simple two-step halide approach". United States. doi:10.1016/j.mseb.2017.12.017.
@article{osti_1455260,
title = {Synthesis, surface chemistry and pseudocapacitance mechanisms of VN nanocrystals derived by a simple two-step halide approach},
author = {Choi, Daiwon and Jampani, Prashanth H. and Jayakody, J. R. P. and Greenbaum, Steven G. and Kumta, Prashant N.},
abstractNote = {Chloroamide precursors generated via a simple two-step ammonolysis reaction of transition metal chloride in the liquid phase at room temperature were heat treated in ammonia at moderate temperature to yield nano-sized VN crystallites. Grain growth inhibited by lowering the synthesis temperature (≈400°C) yielded agglomerated powders of spherical crystallites of cubic phase of VN with particle sizes as small as 6nm in diameter. X-ray diffraction, FTIR, mass spectroscopy (MS), and nuclear magnetic resonance (NMR) spectroscopy assessed the ammonolysis and nitridation reaction of the VCl4-NH3 system. X-ray Rietveld refinement, the BET technique and high-resolution transmission microscopy (HRTEM), energy dispersive x-ray (EDX) and thermogravimetric analysis (TGA) helped assess the crystallographic and microstructural nature of the VN nanocrystals. The surface chemistry and redox reaction leading to the gravimetric pseudo-capacitance value of (≈855 F/g) measured for the VN nanocrystals was determined and validated using FTIR, XPS and cyclic voltammetry analyses.},
doi = {10.1016/j.mseb.2017.12.017},
journal = {Materials Science and Engineering. B, Solid-State Materials for Advanced Technology},
number = C,
volume = 230,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2018},
month = {Sun Apr 01 00:00:00 EDT 2018}
}