Cover Page December-2018-Advanced Materials Letters

Advanced Materials Letters

Volume 9, Issue 12, Pages 895-901, December 2018
About Cover

Researcher of the Year 2018 - Professor T. Venkatesan. The advanced materials community would like to take this opportunity to pay rich tributes to Professor T. Venkatesan for his pioneering research and notable contributions to nanoscience and nanotechnology. Advanced Materials Letters have been selected his photo for the cover of this special year-end issue.


PtSn/C electrocatalysts modified with Ni and Ga for the ethanol electrooxidation   

Giordano T. Paganoto, Josimar Ribeiro*

Departamento de Química, Centro de Ciências Exatas, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, CEP.: 29075-910, Vitória, Espírito Santo, Brazil

Adv. Mater. Lett., 2018, 9 (12), pp 895-901

DOI: 10.5185/amlett.2018.1875

Publication Date (Web): Sep 14, 2018

E-mail: joagrothur@yahoo.com.br

Abstract

Ni and Ga elements are inexpensive compared to the Pt. Ni and NiOx have been recognized to have potential applications in ethanol electrooxidation. For these reasons and based on previous results obtained with Ga addition on Pt-based electrocatalysts we have investigated the PtSn/C electrocatalysts modified with Ni and Ga. The PtSnNiGa/C electrocatalysts were characterized in acidic medium by electrochemical techniques and by physicochemical techniques such as: X-ray diffraction; Energy dispersive X-ray spectroscopy; Transmission electron microscopy. Based on the TEM analyses, the PtSnNiGa/C electrocatalysts show average particle sizes range between 3.6 – 5.5 nm, which is consistent with XRD data. The ethanol oxidation on the PtSnNiGa/C electrocatalysts occurs at lower potentials as compared to the Pt/C. The higher current normalized by Pt mass (2.62 Ag-1Pt), lower susceptibility to poisoning anodic and charge transfer resistance (245 Ω) were obtained for the Pt45Sn22Ni21Ga12/C electrocatalyst.The current normalized by Pt mass: Pt50Sn26Ni12Ga12/C (2.8 Ag-1Pt); Pt45Sn22Ni21Ga12/C (2.62 Ag-1Pt); Pt52Sn21Ni18Ga9/C (1.63 Ag-1Pt) and Pt43Sn23Ni11Ga22/C (1.27 Ag-1Pt) electrocatalysts are higher compared to binary catalysts with high Pt content. The promotion effect of PtSnNiGa/C to ethanol electrooxidation can be explained by the modification structural of Pt by incorporation of Sn, Ni and/or Ga to the face-centered cubic crystalline of Pt.

Keywords

Ethanol oxidation reaction, gallium, platinum, fuel cells, quaternary electrocatalysts.

Current Issue

Tech-footprints for virtual medicine


Advances in corrosion inhibition materials and technologies: A review


Ring models of atoms, molecules and nanomaterials


(FeCo/Ppy@C): Pt-free FeCo-Polypyrrole Nanocomposites Supported on Porous Carbon for Electrochemical Application


Physical and mechanical properties of microwave absorber material containing micro and nano barium ferrite  


Formation of nano-dispersed Cu particles during aging of a Fe-Cu alloy and dislocation effect


Preparation of novel tragacanth gum-entrapped lecithin nanogels 


Modulation of optical properties with multilayer thickness in antimonene and indiene   


Bi-doped CH3NH3PbI3 effective masses and electronic properties research: A theoretical study using VASP


Novel synthesis of Pd nanosheets used as highly sensitive SERS substrate for trace fluorescent dye detection 


Silver nanoparticles mediated by extract of Guar plant (Cyamopsis tetragonoloba), and evaluation of their photocatalytic and antibacterial properties


Study of TiO2 nanofibers prepared by electrospinning technique


Determination of leachate pollution content in soil using in-situ dielectric measurement  


Previous issues

Intelligent healthcare for future medicine

Review of nanoscale layered transition metal chalcogenide superconductors

Evaluation of NSAIDs antioxidant activity on lipid peroxidation in splenocyte membranes

Morphological, structural, thermal and degradation properties of polylactic acid-waxy maize starch nanocrystals based nanocomposites prepared by melt processing

Influence of surfactant on the patterning behavior of nanosilver within polyacrylamide nanogels

Cell study of the biomimetic modifications on a CoCrMo alloy for biomedical applications

SPIONs and curcumin co-encapsulated mixed micelles based nanoformulation for biomedical applications

Fabrication of Y2O3 coatings by cold-spray

Triclinic LiVPO4F/C cathode for aqueous rechargeable lithium-ion batteries

PRAP-CVD: Up-scalable process for the deposition of PEDOT thin films

Effect of storage time, plasticizer formulation and extrusion parameters on the performance of thermoplastic starch films

Effect of silver nanoparticles on the ammonia gas sensing behavior in diphenylamine based conjugated polymer

Study the possibility of using sisal fibres in building applications

Upcoming Congress

Knowledge Experience at Sea TM