jESE - Abstracts

Journal of Electrochemical Science and Engineering – jESE
J. Electrochem. Sci. Eng.

	Open Access Journal
	ISSN: 1847-9286 Imprint Information \| Call for papers \| IAPC

Home

	Last Issue: Vol 3 No 2 >>
Articles in Press	Previous Issues >>

Electrochemical behaviour of PES ionomer and Pt-free catalyst for PEMFCs

STEFANIA GIORDANO^*, MARIANGELA LONGHI, LEONARDO FORMARO,

HERMES FARINA and GIUSEPPE DI SILVESTRO

Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133, Milano, Italy; ^*stefania.giordano@unimi.it

doi: 10.5599/jese.2013.0035 Accepted: 12.04.2013 Available OnLine: 24.04.2013

Abstract: Proton Exchange Membrane Fuel Cells (PEMFCs) represent promising technologies to the world economy, with many applications and low environmental impact. A most important aspect concerning their widespread implementation is the cost of polymeric membranes, typically perfluorinated membranes and platinum-based catalytic electrode materials, all of which are necessary to promote electrode reactions, thus increasing fuel cell energy efficiency. In this work, we present some data about non-fluorinated polyetheresulphone (PES) membranes and Pt-free catalysts, as possible substitutes of the above materials. Their electrochemical behaviour in oxygen reduction reaction in acidic media are investigated and compared with available reference materials.

Keywords: ORR, Pt-free catalyst, PES, PEMFC

Full Article PDF 1,281

Electrochemical treatment of leachates from sanitary landfills

ANNABEL FERNANDES^*, EDITE CATALÃO, LURDES CIRÍACO, MARIA J PACHECO and ANA LOPES

UMTP and Department of Chemistry, University of Beira Interior, 6201-001 Covilhã, Portugal; ^*annabelf@ubi.pt

doi: 10.5599/jese.2013.0034 Accepted: 24.03.2013 Available OnLine: 27.03.2013

Abstract: The electrochemical treatment of leachate samples from a Portuguese intermunicipal sanitary landfill was carried out using anodic oxidation. The treatment was performed in a pilot plant that possesses an electrochemical cell, with boron-doped diamond electrodes, working in batch mode with recirculation. The influence of the applied current density and the flow rate on the performance of the electrochemical oxidation was investigated. Current density was decreased by steps, during the degradation, in order to study this effect on the efficiency of the process. For the assays run at equal flow rate and initial current intensity, chemical oxygen demand (COD) removal seems to depend mainly on the charge passed and the variation of the current density during the anodic oxidation process can reduce the energetic costs. An increase in the recirculation flow rate leads to an increase in the organic load removal rate and a consequent decrease in the energetic costs, but it decreases the nitrogen removal rate. Also, the bias between dissolved organic carbon and COD removals increases with flow rate, indicating that an increase in recirculation flow rate decreases the mineralization index.

Keywords: Landfill leachate treatment; BDD; anodic oxidation

Full Article PDF 1,377

Review

A review of liquid metal anode solid oxide fuel cells

ALIYA TOLEUOVA*^,**, VLADIMIR YUFIT***, STEFAAN SIMONS*^,****, WILLIAM C. MASKELL*^,***
and DANIEL J. L. BRETT*^,^*

*Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK; **School of Engineering, Nazarbayev University, 53 Kabanbay Batyr Ave, Astana 010000, Republic of Kazakhstan; ***Department of Earth Science and Engineering, Imperial College London, London SW7 2AZ, UK; ****International Energy Policy Institute, UCL Australia, 220 Victoria Square, Adelaide, Australia; ^*d.brett@ucl.ac.uk

doi: 10.5599/jese.2013.0032 Accepted: 14.03.2013 Available OnLine: 17.03.2013

Abstract: This review discusses recent advances in a solid oxide fuel cell (SOFC) variant that uses liquid metal electrodes (anodes) with the advantage of greater fuel tolerance and the ability to operate on solid fuel. Key features of the approach are discussed along with the technological and research challenges that need to be overcome for scale-up and commercialisation.

Keywords: Solid oxide fuel cell; liquid metal anode; direct carbon fuel cell

Full Article PDF 2,065 kB

A multichannel frequency response analyser for impedance spectroscopy on power sources

QUENTIN MEYER, SIMON BARASS, OLIVER CURNICK*, TOBIAS REISCH*, DANIEL J. L. BRETT^*

Electrochemical Innovation Laboratory, Centre for CO₂Technology, Department of Chemical Engineering, University College London, UK; *Intelligent Energy Ltd, Loughborough, Leicestershire, UK; ^*d.brett@ucl.ac.uk

doi: 10.5599/jese.2013.0033 Accepted: 06.03.2013 Available OnLine: 15.03.2013

Abstract: A low-cost multi-channel frequency response analyser (FRA) has been developed based on a DAQ (data acquisition)/LabVIEW interface. The system has been tested for electric and electrochemical impedance measurements. This novel association of hardware and software demonstrated performance comparable to a commercial potentiostat / FRA for passive electric circuits. The software has multichannel capabilities with minimal phase shift for 5 channels when operated below 3 kHz. When applied in active (galvanostatic) mode in conjunction with a commercial electronic load (by discharging a lead acid battery at 1.5 A) the performance was fit for purpose, providing electrochemical information to characterize the performance of the power source.

Keywords: LabVIEW, multi-channel impedance, electrical circuit, fuel cell, lead acid battery

Full Article PDF 1,731 kB

Aims and Scope

Open Access Concept

Information

Policy

Article Publishing Charge (APC)

Editorial Board

Indexing & Abstracting

Readers

→

Contents & Abstracts