Synthesis and characterization of LaNiO3-based platinum catalyst for methanol oxidation

Balasubramanian, A.S.; Karthikeyan, N.; Giridhar, V.V.

doi:10.1016/j.jpowsour.2008.08.096

Cited by 17 publications

(6 citation statements)

References 12 publications

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“…15 Composite catalysts containing the perovskite lanthanum nickelate and platinum supported on carbon has been tried as anode material from the author's lab for methanol oxidation. 16 Here, a synergestic effect of increase in oxidation current is observed when perovskite is added to the Pt/C catalyst. However, there are practically no papers dealing with the use of perovskites as anode material for borohydride oxidation and hence the rationality of this work.…”

Section: Introductionmentioning

confidence: 87%

Borohydride electro-oxidation by Ag-doped lanthanum chromites

2014

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The electrocatalytic activity of Ag-doped lanthanum chromites electrode materials viz., LaCr 0.4 Ag 0.6 O 3 and LaCr 0.7 Ag 0.3 O 3 prepared by decomposing the precursor complex is studied. Pure LaCrO 3 is synthesized by combustion route using oxalic acid as a fuel. The decomposition behaviour of the assynthesized powder obtained in the latter method is characterized by TGA-DTA and XRD. Both the precursor complex and the as-synthesized powder are calcined at 900 • C for 7 and 10 h, respectively. XRD of the final product after calcinations indicated the formation of perovskite phase with minor amounts of impurity phases of component oxides in the Ag-doped lanthanum chromites and pure perovskite phase in the undoped one. The surface morphology of the perovskites is studied by SEM. The electrocatalytic activity of the perovskite powders for borohydride oxidation is studied by using cyclic voltammetry (CV) at a catalyst loading of 0.7 mgcm −2 for both Ag-doped and undoped LaCrO 3 coated on glassy carbon substrate. Calibration plots are obtained by plotting the anodic peak current versus concentration of borohydride in the range of 20-100 mM. The sensitivities of the three perovskites towards borohydride oxidation indicated that LaCr 0.4 Ag 0.6 O 3 is the best among all the perovskites studied giving a value of 1.395 µA/mM.

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Section: Introductionmentioning

confidence: 87%

Borohydride electro-oxidation by Ag-doped lanthanum chromites

2014

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“…The physical and chemical properties and the catalytic activities of these perovskites are greatly affected by the nature, oxidation states and the stochiometry of the elements of A and B . Their compositions, with different combinations of charged cations in the A and B sites (A cation can be mono, di or trivalent, whereas B can be a di, tri, tetra, penta or hexavalent cation) , can be varied over a wide range by partial or total substitutions with a great range of metal cations, the resulting formula is in

{{A A}^{^{'}} B B}^{^{'}} O_{3}

form (

A^{^{'}} a n d B^{^{'}}

are substituted cations) . Conventionally in the literature, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3‐δ perovskites oxides containing barium (Ba), strontium (Sr), Cobalt (Co) and iron (Fe) are labeled by BSCF symbol.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore it is a promising source of electrochemical activity [4]. It is reported by oxidation literature [5], noble metals such as Pt and PtÀRu bimetallic system are very efficient materials for methanol electro-oxidation in acid and alkaline media. However, the use of these noble metals suffers a loss in activity with time due to the poisoning of the catalyst by the CO intermediate formed during the oxidation reaction that decreases the anode reactivity rapidly [1].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Ba_0.5Sr_0.5Ni_xCo_0.8‐xFe_0.2O_3‐δ (x=0 and 0.2) Perovskites as Electro‐catalysts for Methanol Oxidation in Alkaline Media

Fares

Barama

et al. 2017

Electroanalysis

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In this study, the perovskite‐type oxides Ba0.5Sr0.5Ni0.2Co0.6Fe0.2O3‐δ (BSNCF) with different B‐site transition metal elements were investigated as a new catalyst for methanol oxidation. They were prepared by the partial substitution of cobalt by nickel in Ba0.5Sr0.5Co0.8Fe0.2O3‐δ (BSCF) sample. Both materials prepared using a combined citrate/EDTA complexing method and their catalytic activitiesfor methanol oxidation were comparativelystudied using cyclic‐voltammetry (CV) and chronoamperometry (CA) in alkaline media at room temperature. Structural, textural, morphological and redox properties of the synthesized solids were investigated by several physicochemical methods such as XRD, FTIR, LRS, SEM‐EDX, BET and H2‐TPR. The as‐prepared materials were obtained with high purity and high crystallinity. The partial substitution of cobalt by nickel in BSCF perovskite changes the structure of the solid which pass from cubic structure to a mixture of cubic and hexagonal forms. This change is accompanied by an increase in BET surface area and a decrease in crystalline size. For the electro‐catalysis measurements, results demonstrated that partially substituting of Co by Ni in BSCF structure enhance the electro‐catalytical activity towards the oxidation of methanol under alkaline conditions, making it an electro‐catalyst candidate for practical utilization in DMFCs.

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“…Method of synthesis may greatly influence the physical characteristics of the powder and the performance of the material whether used directly as catalyst, or subsequently processed into sintered forms [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of Cobalt and Nickel Substitution οn Physical Properties of Perovskite Type Oxides Prepared by the Sol-Gel Citrate Method

2012

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In this study, lanthanum and Co-, Ni-based oxides at different compositions were prepared by the sol-gel citrate method. Ammonium carbonate and citric acid were used as complexing agent and solvent. The oxides were characterized by scanning electron microscopy-energy-dispersive spectroscopy, X-ray diffraction, and the Brunauer-Emmett-Teller method. Surface area analysis was carried out and the effects of substitution of cobalt and nickel on the physical properties of the synthesized oxides were investigated.

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Synthesis and characterization of LaNiO3-based platinum catalyst for methanol oxidation

Cited by 17 publications

References 12 publications

Borohydride electro-oxidation by Ag-doped lanthanum chromites

Borohydride electro-oxidation by Ag-doped lanthanum chromites

Synthesis and Characterization of Ba_0.5Sr_0.5Ni_xCo_0.8‐xFe_0.2O_3‐δ (x=0 and 0.2) Perovskites as Electro‐catalysts for Methanol Oxidation in Alkaline Media

Effects of Cobalt and Nickel Substitution οn Physical Properties of Perovskite Type Oxides Prepared by the Sol-Gel Citrate Method

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Synthesis and characterization of LaNiO3-based platinum catalyst for methanol oxidation

Cited by 17 publications

References 12 publications

Borohydride electro-oxidation by Ag-doped lanthanum chromites

Borohydride electro-oxidation by Ag-doped lanthanum chromites

Synthesis and Characterization of Ba0.5Sr0.5NixCo0.8‐xFe0.2O3‐δ (x=0 and 0.2) Perovskites as Electro‐catalysts for Methanol Oxidation in Alkaline Media

Effects of Cobalt and Nickel Substitution οn Physical Properties of Perovskite Type Oxides Prepared by the Sol-Gel Citrate Method

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Synthesis and Characterization of Ba_0.5Sr_0.5Ni_xCo_0.8‐xFe_0.2O_3‐δ (x=0 and 0.2) Perovskites as Electro‐catalysts for Methanol Oxidation in Alkaline Media