Electrocatalysis of oxygen reduction at electrodeposited molybdenum phosphate-based films

Luque, Gisela C.; Fernández, José Luis Fernández

doi:10.1016/j.jpowsour.2011.11.083

Cited by 9 publications

(2 citation statements)

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“…Moreover, nowadays, the most promising materials are based on transition metals (Fe, Co, Mo, Ag…) 14,15 . and phosphate-based compounds 14,16 . For example, silver phosphate electrodes showed strong electrocatalytic activity [17][18][19] .…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic properties of hydroxyapatite thin films electrodeposited on stainless steel substrates

et al. 2017

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In this work, we have investigated the structural, microstructural, and electrocatalytic properties of hydroxyapatite (HAp) thin films. The HAp films were electrodeposited on stainless-steel (SS) substrates by chronopotentiometry mode from an electrolytic solution. The HAp films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray energy dispersion spectroscopy (EDS). The electrodeposition and electrochemical processes of the hydroxyapatite (HAp) phase were studied by cyclic voltammetry. This HAp/SS system acting as an anode was used for the first time to electrodegrade Rhodamine B (RhB) in aqueous solutions. To follow the degradation kinetics, we used UV-visible spectroscopy. Several parameters such as the current density and the initial concentration of electrolytic solution were determined to optimize the electrodegradation of RhB. The decrease of RhB concentration followed pseudo-first order kinetics law. The rate of RhB degradation in presence of HAp/SS electrode can reach interesting high performance, depending on the electrocatalysis experimental conditions.

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Section: Introductionmentioning

confidence: 99%

Electrocatalytic properties of hydroxyapatite thin films electrodeposited on stainless steel substrates

et al. 2017

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“…133.9 eV, which is typical of the pentavalent oxidation state (P 5+ ). 11 While the undoped H 2 MoO 5 naturally shows only negligible contributions. The results show that P 2p 3/2 of doped H 2 MoO 5 is higher than that of pure H 3 PO 4 (133.0 eV).…”

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Efficient photochemical oxygen generation from water by phosphorus-doped H₂MoO₅

et al. 2014

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Size‐Dependent Enhancement of Electrocatalytic Oxygen‐Reduction and Hydrogen‐Evolution Performance of MoS₂ Particles

Wang

Gao

Zhuo

et al. 2013

Chemistry A European J

242

199

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MoS2 particles with different size distributions were prepared by simple ultrasonication of bulk MoS2 followed by gradient centrifugation. Relative to the inert microscale MoS2, nanoscale MoS2 showed significantly improved catalytic activity toward the oxygen-reduction reaction (ORR) and hydrogen-evolution reaction (HER). The decrease in particle size was accompanied by an increase in catalytic activity. Particles with a size of around 2 nm exhibited the best dual ORR and HER performance with a four-electron ORR process and an HER onset potential of -0.16 V versus the standard hydrogen electrode (SHE). This is the first investigation on the size-dependent effect of the ORR activity of MoS2, and a four-electron transfer route was found. The exposed abundant Mo edges of the MoS2 nanoparticles were proven to be responsible for the high ORR catalytic activity, whereas the origin of the improved HER activity of the nanoparticles was attributed to the plentiful exposed S edges. This newly discovered process provides a simple protocol to produce inexpensive highly active MoS2 catalysts that could easily be scaled up. Hence, it opens up possibilities for wide applications of MoS2 nanoparticles in the fields of energy conversion and storage.

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Electrocatalysis of oxygen reduction at electrodeposited molybdenum phosphate-based films

Cited by 9 publications

References 40 publications

Electrocatalytic properties of hydroxyapatite thin films electrodeposited on stainless steel substrates

Electrocatalytic properties of hydroxyapatite thin films electrodeposited on stainless steel substrates

Efficient photochemical oxygen generation from water by phosphorus-doped H₂MoO₅

Size‐Dependent Enhancement of Electrocatalytic Oxygen‐Reduction and Hydrogen‐Evolution Performance of MoS₂ Particles

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Electrocatalysis of oxygen reduction at electrodeposited molybdenum phosphate-based films

Cited by 9 publications

References 40 publications

Electrocatalytic properties of hydroxyapatite thin films electrodeposited on stainless steel substrates

Electrocatalytic properties of hydroxyapatite thin films electrodeposited on stainless steel substrates

Efficient photochemical oxygen generation from water by phosphorus-doped H2MoO5

Size‐Dependent Enhancement of Electrocatalytic Oxygen‐Reduction and Hydrogen‐Evolution Performance of MoS2 Particles

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Product

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Efficient photochemical oxygen generation from water by phosphorus-doped H₂MoO₅

Size‐Dependent Enhancement of Electrocatalytic Oxygen‐Reduction and Hydrogen‐Evolution Performance of MoS₂ Particles