New kinetic insight into the spontaneous oxidation process of lithium in air by EPMA

Otero, Manuel; Lener, Germán; Trincavelli, J.; Barraco, Daniel E.; Nazzarro, M.; Furlong, Octavio Javier; Leiva, E.P.M.

doi:10.1016/j.apsusc.2016.04.060

Cited by 4 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the air ambient exposure of the NbS 2 -based electrodes, Li-TFSI can also diffuse outward, as also observed in Li-TFSI-doped organic semiconducting lms commonly exploited in perovskite solar cells. 128,129 In addition, Li 2 O or LiOH can also be formed by exposing Li-TFSI-treated electrodes to air or water, 130,131 resulting in H 2 gas evolution. Therefore, the water dragging, the outward diffusion of Li-TFSI and the H 2 evolution may drive the reorientation and nanostructuring (i.e., exfoliation and lateral dimension reduction) of the NbS 2 akes (Fig.…”

Section: Fabrication and Electrochemical Characterization Of Nbs 2bas...mentioning

confidence: 99%

Niobium disulphide (NbS₂)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction

et al. 2019

View full text Add to dashboard Cite

The design of efficient and cost-effective catalysts for the hydrogen evolution reaction (HER) is the key for molecular hydrogen (H 2 ) production from electrochemical water splitting. Transition metal dichalcogenides (MX 2 ), most notably group-6 MX 2 (e.g., MoS 2 and WS 2 ), are appealing catalysts for the HER alternative to the best, but highly expensive, Pt-group elements. However, their HER activity is typically restricted to their edge sites rather than their basal plane. Furthermore, their semiconducting properties hinder an efficient electron transfer to the catalytic sites, which impedes a high rate of H 2 production. Herein, we exploit liquid-phase exfoliation-produced metallic (1H, 2H and 3R) NbS 2 nanoflakes, belonging to the class of metallic layered group-5 MX 2 , to overcome the abovementioned limitations. Both chemical treatment with hygroscopic Li salt and electrochemical in operando self-nanostructuring are exploited to improve the NbS 2 nanoflake HER activity. The combination of NbS 2 with other MX 2 , in our case MoSe 2 , also provides heterogeneous catalysts accelerating the HER kinetics of the individual counterparts. The designed NbS 2 -based catalysts exhibit an overpotential at a cathodic current of 10 mA cm À2 (h 10 ) as low as 0.10 and 0.22 V vs. RHE in 0.5 M H 2 SO 4 and 1 M KOH, respectively. In 0.5 M H 2 SO 4 , the HER activity of the NbS 2 -based catalysts is also superior to those of the Pt/C benchmark at current densities higher than 80 mA cm À2 . Our work provides general guidelines for a scalable and cost-effective exploitation of NbS 2 , as well as the entire MX 2 portfolio, for attaining a viable H 2 production through electrochemical routes.

show abstract

Section: Fabrication and Electrochemical Characterization Of Nbs 2bas...mentioning

confidence: 99%

Niobium disulphide (NbS₂)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction

et al. 2019

View full text Add to dashboard Cite

show abstract

Electron probe microanalysis: A review of recent developments and applications in materials science and engineering

Llovet

Moy

Pinard

et al. 2021

Progress in Materials Science

View full text Add to dashboard Cite

Reprint of: Electron probe microanalysis: A review of recent developments and applications in materials science and engineering

Llovet

Moy

Pinard

et al. 2021

Progress in Materials Science

View full text Add to dashboard Cite

New kinetic insight into the spontaneous oxidation process of lithium in air by EPMA

Cited by 4 publications

References 19 publications

Niobium disulphide (NbS₂)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction

Niobium disulphide (NbS₂)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction

Electron probe microanalysis: A review of recent developments and applications in materials science and engineering

Reprint of: Electron probe microanalysis: A review of recent developments and applications in materials science and engineering

Contact Info

Product

Resources

About

New kinetic insight into the spontaneous oxidation process of lithium in air by EPMA

Cited by 4 publications

References 19 publications

Niobium disulphide (NbS2)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction

Niobium disulphide (NbS2)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction

Electron probe microanalysis: A review of recent developments and applications in materials science and engineering

Reprint of: Electron probe microanalysis: A review of recent developments and applications in materials science and engineering

Contact Info

Product

Resources

About

Niobium disulphide (NbS₂)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction

Niobium disulphide (NbS₂)-based (heterogeneous) electrocatalysts for an efficient hydrogen evolution reaction