Influence of the surface morphology of smooth platinum electrodes for the sodium borohydride oxidation reaction

2014 ◽  
Vol 43 ◽  
pp. 47-50 ◽  
Author(s):  
Pierre-Yves Olu ◽  
Bruno Gilles ◽  
Nathalie Job ◽  
Marian Chatenet
Keyword(s):  
Surface Morphology ◽  
Sodium Borohydride ◽  
Oxidation Reaction ◽  
Platinum Electrodes ◽  
Borohydride Oxidation

scholarly journals Surfactant-free synthesis of carbon-supported silver (Ag/C) nanobars as an efficient electrocatalyst for alcohol tolerance and oxidation of sodium borohydride in alkaline medium

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
Santanu Dey ◽  
Pradipta Chakraborty ◽  
Dhiraj Kumar Rana ◽  
Subhamay Pramanik ◽  
Soumen Basu
Keyword(s):  
Cyclic Voltammetry ◽  
Ethylene Glycol ◽  
Alkaline Medium ◽  
Sodium Borohydride ◽  
Metallic Silver ◽  
Alcohol Tolerance ◽  
Current Ratio ◽  
X Ray ◽  
Scan Rate ◽  
Borohydride Oxidation

AbstractWe have synthesized carbon-supported silver (Ag/C) nanobars by a simple surfactant-free hydrothermal method using glucose as the reducing reagent as well as the source of carbon in Ag/C nanobars. Physicochemical characterization of the materials was performed by X-ray Diffraction (XRD), field emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The XRD pattern confirmed the presence of a pure metallic silver phase. No carbon phase was detected, which indicates that the carbon exists mainly in the amorphous form. The electrocatalytic activity of Ag/C in different electrolyte solutions such as 0.5 M NaOH, 0.5 M NaOH + 1 M ethanol (EtOH), 0.5 M NaOH + 1 M ethylene glycol (EG), and 0.5 M NaOH + 0.01 M NaBH4 (sodium borohydride) was studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA) study. Alcohol tolerance of the catalysts was also established in the presence of ethanol and ethylene glycol. The forward-to-backward current ratio from cyclic voltammetry (CV) study of Ag/C-20 (20 h) in 0.5 M NaOH + 1 M ethanol solution at 100 mV s−1 scan rate is 4.13 times higher compared to that of Ag/C-5 (5 h). Hence, Ag/C-20 is a better candidate for the tolerance of ethanol. In the presence of ethylene glycol (1 M) in 0.5 M NaOH solution, it is obtained that the forward-to-backward current ratio at the same scan rate for Ag/C-20 is lower than that in the presence of ethanol. The durability of the catalyst was studied by chronoamperometry measurement. We studied the electrochemical kinetics of Ag/C catalysts for borohydride oxidation in an alkaline medium. The basic electrochemical results for borohydride oxidation show that Ag/C has very well strength and activity for direct borohydride oxidation in an alkaline medium. The reaction of borohydride oxidation with the contemporaneous BH4−. hydrolysis was noticed at the oxidized silver surface. Among all the synthesized Ag/C catalysts, Ag/C-20 exhibited the best electrocatalytic performance for borohydride oxidation in an alkaline medium. The activation energy and the number of exchange electrons at Ag/C-20 electrode surface for borohydride electro-oxidation were estimated as 57.2 kJ mol−1 and 2.27, respectively.

Borohydride Oxidation on Platinum Electrodes - Is Platinum Really a Faradaic Inefficient BOR Electrocatalyst

2019 ◽  
Vol 41 (1) ◽  
pp. 1719-1727 ◽  
Author(s):  
M. Belen Molina Concha ◽  
KÊnia Freitas ◽  
Aniélli Martini Pasqualeti ◽  
Marian Chatenet ◽  
Fabio H. B. Lima ◽  
...  
Keyword(s):  
Platinum Electrodes ◽  
Borohydride Oxidation

Improvement of the Borohydride Oxidation Reaction by Electrocatalysis on Pt/[TaOPO4/VC]

2018 ◽  
Vol 86 (13) ◽  
pp. 659-670 ◽  
Author(s):  
Rachel Marielle Emily Hjelm ◽  
Yannick Garsany ◽  
Clémence Lafforgue ◽  
Marian Chatenet ◽  
Karen Swider-Lyons
Keyword(s):  
Oxidation Reaction ◽  
Borohydride Oxidation

Arginine-assisted synthesis of palladium nanochain networks and their enhanced electrocatalytic activity for borohydride oxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 18111-18115 ◽  
Author(s):  
Geng-Tao Fu ◽  
Rui Wu ◽  
Chang Liu ◽  
Jun Lin ◽  
Dong-Mei Sun ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electrocatalytic Activity ◽  
Oxidation Reaction ◽  
Three Dimensional ◽  
Assembly Process ◽  
Electrocatalytic Performance ◽  
Borohydride Oxidation

Three-dimensional Pd nanochain networks (Pd-NCNs) were prepared by an arginine-assisted self-assembly process, exhibiting excellent electrocatalytic performance towards the borohydride oxidation reaction.

A Pt/MnV2O6 nanocomposite for the borohydride oxidation reaction

2021 ◽  
Vol 55 ◽  
pp. 428-436
Author(s):  
Jadranka Milikić ◽  
Marta Martins ◽  
Ana S. Dobrota ◽  
Gamze Bozkurt ◽  
Gulin S.P. Soylu ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Borohydride Oxidation

scholarly journals Formic acid oxidation on platinum electrodes: a detailed mechanism supported by experiments and calculations on well-defined surfaces

2017 ◽  
Vol 5 (41) ◽  
pp. 21773-21784 ◽  
Author(s):  
A. Ferre-Vilaplana ◽  
J. V. Perales-Rondón ◽  
C. Buso-Rogero ◽  
J. M. Feliu ◽  
E. Herrero
Keyword(s):  
Formic Acid ◽  
Oxidation Reaction ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Platinum Electrodes ◽  
Direct Path ◽  
Detailed Mechanism ◽  
Active Intermediate ◽  
Formic Acid Oxidation Reaction

The key elements in the mechanism of the formic acid oxidation reaction on platinum have been completely elucidated, not only for the direct path through an active intermediate, but also for the CO formation route.

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