Active nano-CuPt3 electrocatalyst supported on graphene for enhancing reactions at the cathode in all-vanadium redox flow batteries

Flox, Cristina; Rubio-García, Javier; Nafria, Raquel; Zamani, Reza; Skoumal, Marcel; Andreu, Teresa; Arbiol, Jordi; Cabot, Andreu; Morante, J.R.

doi:10.1016/j.carbon.2012.01.060

Cited by 127 publications

(74 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, MWCNTs [5], graphene nanosheets and carbon nanofibers [6,7], functionalization of carbon surface as N-and Ocontaining groups [8], metals such as Pt [6], Ir [9] and Bi [10] and metal oxides Mn 3 O 4 [11,12], WO 3 [13,14], TiO 2 [15], CeO 2 [16], PbO 2 [17], and Nb 2 O 5 [18] were deposited onto the CF supports to prepare modified electrodes. However, although all this research demonstrated an improvement in electrochemical kinetics, the enhanced power density is rarely discussed in the literature as a complementary performance evaluation to the charge/discharge experiments.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

Hosseini

Mousavihashemi

Murcia-López

et al. 2018

Carbon

Self Cite

View full text Add to dashboard Cite

Although Vanadium Redox Flow Battery (VRFB) is well suitable for grid-scale application, their power-related cost must be reduced in order to boost the technology to the market, allowing their widespread commercialization. One effective way to make the VRFB a competitive and viable solution could be through the new strategies for improving the electrocatalytic activity of the electrodes with enhanced electrolyte/electrode interface characteristics. The greatly effective and enhanced-electron transfer could increase the current density with the decrement of the stack size. Herein, we report the synergistic effect demonstrated by N-and WO 3 -decorated carbon-based positive electrode, named HTNW electrode, which demonstrates the feasibility of achieving: i) enhanced electrocatalytic activity, indicating high rate towards VO 2+ /VO 2 + couple (promotion of oxygen and electron transfer processes), ii) decrement of the electron-transfer resistance from 75.62 Ω to 12.4 Ω for the pristine electrode and HTNW electrodes, respectively; iii) 51% of the electrolyte utilization ratio at high rates (i.e. 200 mA cm -2 ) with 70% of energy efficiency ; iv) increment of more than 50% of the power-peak in comparison with HT electrode.

show abstract

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

Hosseini

Mousavihashemi

Murcia-López

et al. 2018

Carbon

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is consistent with the picture of organic spacer as effective structural directors. Owing to its largest surface area, we selected the catalyst Au@TiO 2 (b), prepared using 1,3,5-tris(4-carboxyphenyl)benzene 5 acid as spacer, to compare the catalytic activity of embedded Au@TiO 2 materials with that of impregnated samples. The impregnated Au/TiO 2 sample was prepared by impregnating a mesoporous TiO 2 materials obtained using the 1,3,5-tris(4-carboxyphenyl)benzene spacer with 1% of Au: Au/TiO 2 (b).…”

Section: Resultsmentioning

confidence: 99%

“…A solution towards optimizing nanoparticle properties can be found in colloidal synthesis routes, 35 which have been demonstrated successful in preparing nanoparticles with a high level of control over size, geometry, phase, and composition. [1][2][3][4][5] However, the dispersion of these nanoparticles over oxide supports, especially those with large surface areas and small pores is an extremely challenging task. 40 Recently, a new synthetic strategy to produce mesoporous silica matrices with embedded but accessible gold nanoparticles has been reported.…”

mentioning

confidence: 99%

“…molar ratio = 2.6) and balanced with Ar was feed into reactor, using a GHSV =9965 h -1 . The CO oxidation reaction was monitored by means of diffuse reflectance infrared spectroscopy (DRIFT) in a Nicolet Magna-IR 750 FTIR spectrometer equipped with a liquid-nitrogen-cooled 5 MCT detector and a Spectra Tech Inc. catalytic DRIFT chamber. The outlet of the DRIFT chamber was connected on-line through a capillary tube to a Balzers instrument (QME 200) equipped with a quadrupole mass spectrometer, which had been previously calibrated to monitor the evolution of the different potential 10 products.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Embedding catalytic nanoparticles inside mesoporous structures with controlled porosity: Au@TiO2

et al. 2013

Self Cite

View full text Add to dashboard Cite

Royal Society of Chemistry Nafria, R.; Ramirez De La Piscina, P.; Homs, N.; Ramon Morante, J.; Cabot, A.; Díaz Morales, UM.; Corma Canós, A. (2013) The hability to produce catalytic nanoparticles with controlled properties is key to develop and produce heterogeneous catalysts with optimized activity and selectivity. Not less important is to maximize the nanoparticle dispersion over high area supports maintaining their optimized properties. Here we detail a general procedure to produce heterogeneous 10 catalysts containing a large surface area mesoporuos support and highly dispersed catalytic nanoparticles with controlled properties. We exemplify the developed method using colloidal gold nanocrystals as the catalytically active phase and titanium oxide as the paradigmatic support. Our synthetic strategy is based on the formation of an inorganicorganic hybrid mesoporous material from the surface of the colloidal nanocrystals. A 15 variety of organic spacers allows tuning the final porosity of the support. The good accessibility of the active catalytic sites in these materials is demonstrated by high CO oxidation conversion values.

show abstract

“…The main objective is to introduce oxygenated functional groups onto the fiber surface, to increase the active sites and improve the hydrophilicity of the fiber in the electrolyte. In recent years, it is found that depositing electro-catalyst such as metals (Ir, Bi) [13,14], alloys (CuPt 3 ) [15] and mental oxides (Mn 3 O 4 ) [16] onto the fiber surface can greatly enhance the electrochemical performance of CF. However, the poor mechanical stability hampers their practical application [16].…”

Section: Introductionmentioning

confidence: 99%

Cell architecture upswing based on catalyst coated membrane (CCM) for vanadium flow battery

Yao¹,

Zhang²,

Liu³

et al. 2013

Journal of Power Sources

View full text Add to dashboard Cite

Active nano-CuPt3 electrocatalyst supported on graphene for enhancing reactions at the cathode in all-vanadium redox flow batteries

Cited by 127 publications

References 6 publications

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

High-power positive electrode based on synergistic effect of N- and WO3 -decorated carbon felt for vanadium redox flow batteries

Embedding catalytic nanoparticles inside mesoporous structures with controlled porosity: Au@TiO2

Cell architecture upswing based on catalyst coated membrane (CCM) for vanadium flow battery

Contact Info

Product

Resources

About