Studies of the methanol crossover and cell performance behaviors of high temperature-direct methanol fuel cells (HT-DMFCs)

Gwak, Geonhui; Kim, Dowhan; Lee, Suwon; Ju, Hyunchul

doi:10.1016/j.ijhydene.2017.11.029

Cited by 27 publications

(5 citation statements)

References 26 publications

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“…On the other hand, in order to reduce the CO poisoning and effective conversation of CO to CO 2 adsorbed on the layer of catalyst, a catalytic material or higher amount of catalyst loading is requird [11]. Several numerical and experimental studies have been conducted for the synthesis of catalyst materials, ink preparation, Membrane Electrode Assembly (MEA) fabrication and operating parameters to improve the performance of the DMFC [12][13][14][15][16][17][18]. It is well understood that the performance of the DMFCs are greatly dependent on the anode catalyst material, which should have high activity, stability and durability.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Thiagarajan

Karthikeyan

Thanarajan

et al. 2019

International Journal of Hydrogen Energy

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In this present work, the effect of anode electrocatalyst materials is investigated by adding NiTiO 3 with Pt/C and Pt-Ru/C for the performance enhancement of direct methanol fuel cells (DMFCs). The supportive material NiTiO 3 /C has been synthesized first by wet chemical method followed by incorporation of Pt and Pt-Ru separately. Experiments are conducted with the combination of four different electrocatalyst materials on the anode side (Pt/C, Pt-NiTiO 3 /C, PtRu/C, Pt-Ru-NiTiO 3 /C) and with commercial 20 wt. % Pt/C on the cathode side; 0.5 mg pt /cm 2 loading is maintained on both sides. The performance tests of the above catalysts are conducted on 5 cm 2 active area with various operating conditions like cell operating temperatures, methanol/water molar concentrations and reactant flow rates. Best performing operating conditions have been optimized. The maximum peak power densities attained are 13.30 mW/cm 2 (26.6 mW/mg pt) and 14.60 mW/cm 2 (29.2 mW/mg pt) for Pt-NiTiO 3 /C and Pt-Ru-NiTiO 3 /C at 80 , respectively, with 0.5 M concentration of methanol and fuel flow rate of 3 ml/min (anode) and oxygen flow rate of 100 ml/min (cathode). Besides, 5 h short term stability tests have been conducted for PtRu/C and Pt-NiTiO 3 /C. The overall results suggest that the incorporation of NiTiO 3 /C supportive material to Pt and Pt-Ru appears to make a promising anode electrocatalysts for the enhanced DMFC performances.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Thiagarajan

Karthikeyan

Thanarajan

et al. 2019

International Journal of Hydrogen Energy

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“…Penelitian yang telah dilakukan hingga saat ini untuk mengganti nafion dengan PEEK masih belum memenuhi karakteristik konduktifitas proton yang tinggi dan permeabilitas metanol sekecil mungkin. Sehingga masih perlu dilakukan modifikasi membran PEEK (Gwak, Kim, Lee, & Ju, 2018 (Noor & Hartoto, 2011). Siklodekstrin merupakan suatu material yang memiliki potensi digunakan sebagai pengisi pada membran sPEEK dengan harapan dapat meningkatkan nilai konduktivitas proton dikarenakan sifat siklodekstrin yang merupakan konduktif polimer dengan struktur berbentuk toroid (kerucut terpotong), permukaan luar bersifat hidrofilik dan permukaan dalam yang bersifat hidrofobik sehingga mampu melakukan penyerapan air secara stabil (Peng et al, 2016).…”

Section: Pendahuluanunclassified

Pengaruh Metode Sulfonasi dan Penambahan Pengisi pada Membran Direct Metanol Fuel Cell

Hakim

Kusworo

2018

JRST

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Penggunaan polieter-eter keton (PEEK) sebagai membran pengganti nafion pada aplikasi direct methanol fuel cell (DMFC) menjadi penelitian yang terus dikembangkan, Penyempurnaan PEEK menuju karakteristik nafion juga terus dilakukan dengan berbagai metode, baik itu dengan penambahan pengisi maupun pengembangan metode baru dalam proses pembuatan membran PEEK. Methanol crossover dan rendahnya nilai konduktifitas menjadi salah satu kelemahan membran PEEK yang masih perlu di selesaikan dengan cara yang solutif. Tujuan percobaan ini adalah melakukan pengembangan metode pembuatan membran serta menambahkan bahan pengisi untuk memperbaiki karakteristik membran PEEK. Dengan metode A yaitu penambahan pengisi siklodekstrin 10% sebelum proses sulfonasi, metode B yaitu penambahan pengisi siklodekstrin dan silika dilakukan setelah proses sulfonasi pada suhu dan waktu tetap 700C selama 4 jam, hasil karakteristik terbaik diantara dua metode tersebut kemudian ditambahakan pengisi silika untuk meningkatkan sifat hidrofilik membran. Hasil percobaan menunjukkan hasil terbaik pada membran sPEEK-siklodekstrin-silika 10% dengan metode A, penambahan pengisi dilakukan sebelum sulfonasi, dengan nilai swelling degree 140% dan hasil analisa FTIR gugus sulfonat pada membran sPEEK-siklodekstrin-silika 10% yaitu terdapat pada rentang panjang gelombang 1153-1155 cm-1 dan 1217 cm-1 (vibrasi stretching simmetrik dan assimetrik O=S=O).

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“…Эти проблемы актуальны как для анодного катализатора окисления метанола [1], так и для катодного катализатора восстановления кислорода. При этом еще одной важной проблемой катодных катализаторов является кроссовер метанола в катодное пространство [2]. Наночастицы Pt, нанесенные на высокодисперсный углеродный носитель, являются одним из наиболее распространенных катализаторов, однако, довольно высокая стоимость этого металла в сочетании с низкой толерантностью к промежуточным продуктам окисления остаются главной проблемой, мешающей широкому использованию Pt в качестве анода и/ или катода в ПМТЭ.…”

Section: Introductionunclassified

Effect of the morphology and composition of trimetallic PtCuAu/C catalysts on the activity and stability of the methanol oxidation reaction

Menshchikov¹,

Беленов

Никулин

2022

kcmf

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A study on the influence of the method for obtaining trimetallic PtCuAu/C catalysts on their activity in the oxidation of methanol has been carried out. The structural characteristics of the obtained trimetallic catalysts have been studied by X-ray diffraction and transmission electron microscopy. The nanoparticles of the material obtained by the galvanic synthesis method had a size twice as large (~ 6 nm) than the nanoparticles of the material obtained by the co-deposition of metal precursors. According to the results from the accelerated stress testing of catalysts, it was found that the material obtained by the galvanic method of substitution of copper atoms with gold had a higher residual activity in the oxidation of methanol than the commercial Pt/C analogue. This study shows the potential of obtaining and using multicomponent platinum-containing nanoparticles deposited on a carbon carrier as effective catalysts for use in methanol fuel cells.

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Studies of the methanol crossover and cell performance behaviors of high temperature-direct methanol fuel cells (HT-DMFCs)

Cited by 27 publications

References 26 publications

Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Experimental investigation on DMFCs using reduced noble metal loading with NiTiO3 as supportive material to enhance cell performances

Pengaruh Metode Sulfonasi dan Penambahan Pengisi pada Membran Direct Metanol Fuel Cell

Effect of the morphology and composition of trimetallic PtCuAu/C catalysts on the activity and stability of the methanol oxidation reaction

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