In the present work, carbon-supported Pt-Ru, Pt-Ni and Pt-Ru-Ni electrocatalysts with different atomic ratios were synthesized by NaBH 4 reduction method. The synthesized electrocatalysts were characterized by TEM, EDX and XRD analyses. The Pt metal was the predominant material in all the samples, with peaks attributed to the face-centered cubic (fcc) crystalline structure. The TEM analysis indicated that the prepared catalysts had similar particle morphology, and their particle sizes were 3-5 nm. The electrocatalytic activities of the synthesized electrocatalysts were characterized by cyclic voltammetry (CV) and chronoamperometry (CA). During the experiments performed on single membraneless fuel cells, Pt 50 Ru 40 Ni 10 /C performed better among all the catalysts prepared with power density of 38.2 mW cm À2 . The enhanced methanol oxidation activity by Ni in Pt 50 Ru 40 Ni 10 /C can be attributed to the electronic effect as the result of the modification of electronic properties of Pt and the various oxidation states of Ni.In this work, for the first-time carbon-supported binary Pt-Ru, Pt-Ni and ternary Pt-Ru-Ni anode catalysts were successfully tested in a single membraneless fuel cell using 1.0 M methanol as the fuel and 0.1 M sodium perborate as the oxidant in the presence of 0.5 M H 2 SO 4 as the electrolyte at room temperature.

No abstract

This paper presents the continuous flow operation of membraneless sodium percarbonate fuel cell using acid/alkaline bipolar electrolyte. In this membraneless fuel cell, methanol is used as a fuel and sodium percarbonate is used as an oxidant for the first time under "multi-media" configuration. Sodium percarbonate affords hydrogen peroxide in aqueous medium. At room temperature, the laminar flow based microfluidic membraneless fuel cell can reach a maximum power density of 22.25 mW cm −2 with a fuel mixture flow rate of 0.3 mL min −1 . The developed fuel cell features no proton exchange membrane. The simple planar structured membraneless sodium percarbonate fuel cell enables high design flexibility and easy integration of the microscale fuel cell into actual microfluidic systems and portable power applications.

This paper presents the continuous flow operation of membraneless sodium percarbonate fuel cell (MLSPCFC) using acid/alkaline bipolar electrolyte. In the acid/alkaline bipolar electrolyte, percarbonate works both as an oxidant as well as reductant. Sodium percarbonate affords hydrogen peroxide in aqueous medium. The cell converts the energy released by H2O2 decomposition with H+ and OH− ions into electricity and produces water and oxygen. At room temperature, the laminar flow based microfluidic membraneless fuel cell can reach a maximum power density of 28 mW/cm2 with the molar ratio of [Percarbonate]/[NaOH] = 1 as fuel and [Percarbonate]/[H2SO4] = 2 as oxidant. The paper reports for the first time the use of sodium percarbonate as the oxidant and reductant. The developed fuel cell emits no CO2 and features no proton exchange membrane, inexpensive catalysts, and simple planar structure, which enables high design flexibility and easy integration of the microscale fuel cell into actual microfluidic systems and portable power applications.

No abstract