Characterization and performance evaluation of Pt Ru/C TiO2 anode electrocatalyst for DMFC applications

Ercelik, Mustafa; Ozden, Adnan; Şeker, Erol; Çolpan, C. Özgür

doi:10.1016/j.ijhydene.2016.12.020

Cited by 37 publications

(16 citation statements)

References 55 publications

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“…236,237 When a Pt-Ru/C anode electrocatalyst was supported on TiO 2 , Pt became more effective in terms of oxidation activity. 238 The highest power densities were found to be 705.12 W/m 2 and 709.32 W/m 2 at 80 C and 1 M for DMFCs based on Pt-Ru/C-TiO 2 anode electrocatalysts containing 5 wt % of commercial and inhouse TiO 2 , respectively. 238 Methanol crossover through perfluorosulfonic polymers such as Nafion is another major problem affecting the long-term performance of DMFC systems, precluding their practical application, because it leads to cathode catalyst poisoning and a consequent drop in OCV values.…”

Section: Direct Methanol Fuel Cellmentioning

confidence: 91%

“…238 The highest power densities were found to be 705.12 W/m 2 and 709.32 W/m 2 at 80 C and 1 M for DMFCs based on Pt-Ru/C-TiO 2 anode electrocatalysts containing 5 wt % of commercial and inhouse TiO 2 , respectively. 238 Methanol crossover through perfluorosulfonic polymers such as Nafion is another major problem affecting the long-term performance of DMFC systems, precluding their practical application, because it leads to cathode catalyst poisoning and a consequent drop in OCV values. [233][234][235][236] Much effort has been made to develop alternative proton exchange membranes for DMFCs with improved functionality and low cost.…”

Section: Direct Methanol Fuel Cellmentioning

confidence: 91%

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Production of Liquid Solar Fuels and Their Use in Fuel Cells

Fukuzumi

2017

Joule

173

116

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This review focuses on the production of liquid fuels using solar energy combined with their use in direct liquid fuel cells. The production of formic acid, which is the two-electron reduced product of CO 2 , as a solar liquid fuel as well as a hydrogen storage material is discussed together with its use in direct formate fuel cells. Other CO 2 reduction products such as methanol and formaldehyde as solar liquid fuels as well as hydrogen storage materials are reviewed with the performance of the corresponding fuel cells. The production of nitrogen fixation products such as ammonia and hydrazine is also reviewed together with their fuel cells. Finally, the production of hydrogen peroxide from not only pure water but also seawater and dioxygen in the air using solar energy is discussed and combined with the recent development of one-compartment hydrogen peroxide fuel cells.

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Section: Direct Methanol Fuel Cellmentioning

confidence: 91%

Section: Direct Methanol Fuel Cellmentioning

confidence: 91%

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Fukuzumi

2017

Joule

173

116

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“…Hence, the use of an active system enhances fluid mass transport and electrochemical activity, and so a higher performance of power output can be achieved. 8 In the literature, there are many studies on the development and performance improvement of single DMFCs or DMFC stacks, which include examining the effect of operating parameters, [9][10][11][12][13][14] the effect of methanol permeation, 15,16 the materials used in membrane electrode assemblies (MEAs), 17,18 and the flow field and manifold design in cell and stack levels. 19,20 Gwak et al 21 investigated the methanol crossover and cell voltage of a hightemperature DMFC using a one-dimensional model.…”

Section: Introductionmentioning

confidence: 99%

Semiempirical thermodynamic modeling of a direct methanol fuel cell system

et al. 2019

Self Cite

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Summary In this study, a thermodynamic model of an active direct methanol fuel cell (DMFC) system, which couples in‐house experimental data for the DMFC with the mass and energy balances for the system components (condenser, mixing vessel, blower, and pumps), is formed. The modeling equations are solved using the Engineering Equation Solver (EES) program. This model gives the mass fluxes and thermodynamic properties of fluids for each state, heat and work transfer between the components and their surroundings, and electrical efficiency of the system. The effect of the methanol concentration (between 0.5 and 1.25 M) and air flow rate (between 20 and 30 mL cm−2 min−1) on the net power output and electrical efficiency of the system and the condenser outlet temperature is investigated. The results essentially showed that the highest value for the electrical efficiency of the system is 23.6% when the current density, methanol concentration, and air flow rate are taken as 0.2 A cm−2, 0.75 M, and 20 mL cm−2 min−1, respectively. In addition, the air flow rate was found to be the most significant parameter affecting the condenser outlet temperature.

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“…H2 gas, liquid alcohol) at the anode side, where the electrons produced during the process is transmitted via an external circuit to generate electrical current before it is intercepted by oxygen at the cathode side [4]. A number of researches were focused on optimizing the electro-oxidation of the fuel at the anode side [5]. However, attention must also be directed in improving the oxygen reduction reaction (ORR) at the cathode compartment, which is controlled by slow reaction kinetics and high over potential that in turn limits the overall performance of the fuel cell [6].…”

Section: Introductionmentioning

confidence: 99%

“…However, attention must also be directed in improving the oxygen reduction reaction (ORR) at the cathode compartment, which is controlled by slow reaction kinetics and high over potential that in turn limits the overall performance of the fuel cell [6]. Due to these limitations, researchers seek to develop novel electrocatalysts that are highly active towards the ideal four-electron route of the ORR [5,7].…”

Section: Introductionmentioning

confidence: 99%

Platinum-Free Electrocatalyst for Oxygen Reduction Reaction Derived from the Direct Pyrolysis of Watermelon Peels

Matibag

Geronimo

Garcia

et al. 2019

IJIE

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Carbon-based nanomaterials derived from the pyrolysis of heteroatom-containing carbonaceous precursor was shown to exhibit significant electrocatalytic activity towards oxygen reduction reaction (ORR). Biomass from agricultural waste could be seen as possible low-cost precursor for the preparation of carbon-based ORR electrocatalysts. In this study, watermelon peels (WP) were directly pyrolyzed under N2 atmosphere to produce novel carbon-based ORR electrocatalysts. WP were oven-dried and pulverized using a mechanical grinder to produce WP powder. A weighed amount of the resulting powder was then transferred into a ceramic boat and inside a quartz tube furnace. The WP powder was pyrolyzed from room temperature to pyrolysis temperature T at a rate of 5 °C/min under N2 atmosphere. The temperature was held at T for an hour, followed by natural cooling back to room temperature. The pyrolysis temperature was optimized, with T = 800 °C, 900 °C, and 1000 °C. The resulting pyrolysis products were characterized using cyclic voltammetry (CV), rotating disc electrode voltammetry (RDE), and scanning electron microscopy-energy dispersive x-ray spectroscopy (SEM-EDX). CV revealed that WP pyrolyzed at 1000 °C gave the most positive onset potential (Eonset = 0.40 V) and highest current density (j = 10.79 mA/cm 2), compared to those pyrolyzed at 800 °C (Eonset = 0.30 V; j = 2.047 mA/cm 2) and 900 °C (Eonset = 0.30 V; j = 3.494 mA/cm 2). Levich analysis from RDE data showed that the electrocatalysts prepared at 1000 °C proceeded closest to the ideal four-electron route, compared to those prepared at 800 °C and 900 °C. SEM-EDX analysis showed the changes WP underwent in terms of surface morphology and elemental composition, which are then correlated with the apparent electrocatalytic activities of pyrolyzed WP. These findings present the feasibility of using WP as low-cost precursor for ORR electrocatalysts, which could be utilized in fuel cells.

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Characterization and performance evaluation of Pt Ru/C TiO2 anode electrocatalyst for DMFC applications

Cited by 37 publications

References 55 publications

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Semiempirical thermodynamic modeling of a direct methanol fuel cell system

Platinum-Free Electrocatalyst for Oxygen Reduction Reaction Derived from the Direct Pyrolysis of Watermelon Peels

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