Raney-platinum film electrodes for potentially implantable glucose fuel cells. Part 2: Glucose-tolerant oxygen reduction cathodes

Kerzenmacher, Sven; Kräling, U.; Schroeder, M.; Brämer, Regina; Zengerle, Roland; Stetten, Felix von

doi:10.1016/j.jpowsour.2010.04.049

Cited by 38 publications

(44 citation statements)

References 22 publications

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“…The observed decrease in OCP at 1 ppm DO is about 14 mV for the electrodes with 100 nm pores and about 8 mV for the electrodes with 200 nm pores. These values are smaller than those reported for the Pt-Al cathode (measured without a Nafion diffusion barrier) under similar conditions [22].…”

Section: Electrode Performancecontrasting

confidence: 69%

“…Although the potential drift rates of the electrodes with 100 and 200 nm pores was measured to be 1.57 mV h −1 and 1.45 mV h −1 respectively after the first hour, this decreased to 0.13 mV h −1 and 0.6 mV h −1 during the last 3 hours. This shows that the Pd catalyst stabilize under load with time compared to the Pt-Raney electrodes (0.9 mV h −1 for the electrodes without the diffusion barrier) [22]. The explanation for the reduction in electrode potential may result from the adsorption of reaction intermediates gradually deactivating the active surface.…”

Section: Electrode Stabilitymentioning

confidence: 86%

“…According to [22], DO consumption at the outer region of the electrode could trigger oxygen depletion in the pores where the local potential is dominated by the presence of glucose. This effect would be dependent on the electrode geometry and the substrate with 200 nm pores could be more susceptible if the catalytic active material (Pd) had penetrated deep into the pores during fabrication.…”

Section: Electrode Performancementioning

confidence: 99%

“…Obtaining an adequate efficiency of the fuel cell acquires the use of both a glucose selective anode as well as an oxygen selective cathode. Considering the latter, common catalyst material such as platinum (Pt) or Raney-Pt alloy offers both good catalytic properties towards DO reduction and glucose oxidation [20,22,23], and is therefore not a perfect material if both analytes are present. Activated carbon may represent an alternative but has a lower overall catalytic activity compared to the RaneyPt alloy in the presence of glucose [24,25].…”

Section: Introductionmentioning

confidence: 99%

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Thin film nanoporous electrodes for the selective catalysis of oxygen in abiotically catalysed micro glucose fuel cells

et al. 2016

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Selective reduction of oxygen is an important property of fuel cells designed to operate in a mixed fuel environment containing both oxidizing and reducing reactants. This would be of particular importance in the design of a long lasting energy supply unit powering implantable microsystems and running from exogeneous chemicals that is abundant in the body (such as glucose and oxygen). This paper presents the development of a nanoporous electrode for oxygen reduction in the presence of glucose. The electrode was fabricated by e-beam deposition of palladium thin films on porous ceramic aluminium oxide (AAO) substrates with a pore size of 100 and 200 nm respectively. The porous nature of the electrodes improved the catalytic properties by increasing the real surface area close to 100 times the geometric surface area. At a dissolved physiological oxygen (DO) concentration of 2 ppm, the maximum exchange current density was found to be 2.9×10 −3 ± 0.5×10 −3 µA cm −2 whereas the potential reduction due to the addition of 5 mM glucose was about 20.6 ± 16.1 mV. The Tafel slopes were measured to be about 60 mV per decade. After running for 21 hours in a physiological saline solution with 2 ppm DO and 3 mM glu- cose, the reduction in the electrode operational potential was -0.13 mV h −1 under a load current density of 4.4 µA cm −2 . These results suggest that nanoporous AAO cathodes coated with palladium offers a reasonable catalytic performance with a good selectivity towards oxygen in the presence of glucose.

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Section: Electrode Performancecontrasting

confidence: 69%

Section: Electrode Stabilitymentioning

confidence: 86%

Section: Electrode Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thin film nanoporous electrodes for the selective catalysis of oxygen in abiotically catalysed micro glucose fuel cells

et al. 2016

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“…Raney-platinum film cathodes were fabricated from 500 nm of each platinum and aluminium successively evaporated onto a silicon substrate (1.7 × 1.7 cm 2 ) with 20 nm of titanium as adhesion layer [27]. Aluminium as sacrificial alloy partner was removed after annealing (1 h, 300°C) in 1 mol L -1 NaOH, leaving behind a rough Pt-Al catalyst, as described in [27,28].…”

Section: Electrode Fabricationmentioning

confidence: 99%

A Single Layer Glucose Fuel Cell Intended as Power Supplying Coating for Medical Implants

et al. 2011

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We present a novel type of abiotically catalysed implantable glucose fuel cell with anode and cathode placed side by side, using a Raney‐platinum glucose oxidation anode with high tolerance towards oxygen. In contrast to conventional assembly designs used for implantable glucose fuel cells, no permeable cathode mounted in front of the anode to effect oxygen depletion is required. At 2.2 ± 0.1 μW cm–2 the single layer fuel cell exhibits only half the maximum power density of the conventional fuel cell, which solely stems from the doubled total fuel cell area demand. Nevertheless, the novel single layer design is advantageous in terms of simplified fabrication and reduced overall thickness, facilitating implementation of the fuel cell as a power supplying coating directly on the surface of medical implants. Furthermore, the single layer design offers an attractive possibility to diminish the reduction of power density by limited oxygen mass transfer to the cathode by increasing the cathode to anode area proportion. With doubled cathode area proportion a by 36% higher power density can be reached. To calculate the optimum cathode to anode area proportions, we introduced an analytical model based on the experimentally determined polarisation resistances of the individual electrodes.

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Abiotic (Nonenzymatic) Implantable Biofuel Cells

Kerzenmacher

2014

Implantable Bioelectronics

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Raney-platinum film electrodes for potentially implantable glucose fuel cells. Part 2: Glucose-tolerant oxygen reduction cathodes

Cited by 38 publications

References 22 publications

Thin film nanoporous electrodes for the selective catalysis of oxygen in abiotically catalysed micro glucose fuel cells

Thin film nanoporous electrodes for the selective catalysis of oxygen in abiotically catalysed micro glucose fuel cells

A Single Layer Glucose Fuel Cell Intended as Power Supplying Coating for Medical Implants

Abiotic (Nonenzymatic) Implantable Biofuel Cells

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