Two modifications to a reference direct methanol fuel-cell (DMFC) system are considered to improve methanol fuel utilisation. Fuel utilisation can be optimised by minimising the parasitic methanol crossover by manipulating methanol concentration in the fuel cells. Simulations of the two systems indicate that there is considerable potential to increase fuel utilisation for dynamic concentration ...

O2 reduction by ferrocene and its derivatives in organic media in the presence of an acid, such as trichloroacetic and trifluoroacetic acids and perchloric acid, has been known for many years. Recently, O2 reduction has also been studied in biphasic systems composed of an organic solvent containing a ferrocene derivative in contact with an aqueous inorganic acid solution containing a very lipop...

10 Article history: 11 Received 30 September 2010 12 Revised 23 November 2010 13 Accepted 6 December 2010 14 Available online xxxx 1567 18 19 The dorsal medial frontal cortex (dMFC) is highly active during choice behavior. Though many models have 20 been proposed to explain dMFC function, the conflict monitoring model is the most influential. It posits that 21 dMFC is primarily involved in dete...

In this paper, a special micro DMFC using MEMS technology is designed to work in a circumrotating condition, which providing power using inertia over-load. The designed cell is a cylinder, anode channel is inside, cathode is outside and exposes to the air. When the overload exceeds the critical value, the liquid inside reserve tank will splash and comes into the two electrodes, and then the cel...

1572-6657/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.jelechem.2009.11.029 * Corresponding author. Fax: +41 21 6933667. E-mail address: [email protected] (H.H. Girau 1 Present address: Institute of Microanalytical Syste Zhejiang University, 310058 Hangzhou, China. Molecular oxygen (O2) reduction by decamethylferrocene (DMFc) was investigated at a polarized water/ 1,2-dichloroetha...

Polymer electrolyte membranes (PEMs) for direct methanol fuel cell (DMFC) applications were prepared from a graft-copolymer (PSF-g-PSSA) consisting of a polysulfone (PSF) main chain and poly(styrene sulfonic acid) (PSSA) side chains with various average distances between side chains (Lav) and side chain lengths (Lsc). The polymers were synthesized by grafting ethyl p-styrenesulfonate (EtSS) on ...

This work describes for the first time a paper-based direct methanol fuel cell platform (PB-DMFC) that functions as an energy source and biosensor, assembled on simple paper substrate point-of-care (POC) applications, targeting sarcosine proof-of-concept. Specifically, strip was developed from square of Whatman paper, acting substrate. The treated with impermeable agent (paraffin solution) supp...

The effect of the Au coated printed circuit board (PCB) as a current collector on performance fuel cells is demonstrated. In this study, optimized pulse electroplating was introduced, which found to be much more effective compared direct (DC) plating for PCB fabrication based passive area from potentiodynamic polarization scan. Variable electrochemical parameters such applied potential and freq...

A modified 3D numerical model on the energy conversion process in the anode side of a Direct Methanol Fuel Cell (DMFC) system was constructed and validated to published experimental results. Systematic simulations were performed to investigate the underlying mechanisms of the energy conversion process, and the combined effects of inlet flow rate and input methanol concentration were summarized ...

1. Abstract Pt-Ru/C catalyst has been applied extensively in direct methanol fuel cells for methanol electrochemical oxidation. In this study, a model for electrochemical kinetics of methanol has been developed for electrocatalyst Pt-Ru/C. The single cell performance of DMFC and AC impedance analysis were measured. The methanol crossover problem still remains a challenge for the applications of...