Murat FARSAK, Gülfeza KARDAŞ

100116

Enhanced electrocatalytic efficiency of C/MWNTs for methanol oxidation using Ni deposited on MWNTs

The power density of direct methanol fuel cells (DMFCs) can be changed by using different anode materials. Especially porous materials are preferred for the anode. In the present study, multiwall carbon nanotubes were first injected into graphite. Then, by depositing nickel, a catalyst was prepared for use as the anode material of the DMFC. This catalyst was named Ni@MWNTs. The oxidation of methanol and some kinetic parameters were investigated in KOH solution. Cyclic voltammetry was used for the electrochemical measurements. Kinetic parameters of the methanol oxidation were determined at different temperatures, scan rates, and concentrations of methanol. The surface morphologies and nickel deposition amounts of the Ni@MWNTs and Ni-C (nickel deposited graphite) electrodes were characterized with scanning electron microscope (SEM), atomic force microscope (AFM), and energy-dispersive X-ray (EDX) spectroscope. It was found that the Ni@MWNTs electrode was more active than the Ni-C electrode. The activation energy of the Ni@MWNTs electrode was calculated as 19.52 kJ mol$^{-1}$ for the methanol oxidation process.
Anahtar Kelimeler:

Fuel cells, nanostructured materials, catalyst, composite materials, anode

Enhanced electrocatalytic efficiency of C/MWNTs for methanol oxidation using Ni deposited on MWNTs

The power density of direct methanol fuel cells (DMFCs) can be changed by using different anode materials. Especially porous materials are preferred for the anode. In the present study, multiwall carbon nanotubes were first injected into graphite. Then, by depositing nickel, a catalyst was prepared for use as the anode material of the DMFC. This catalyst was named Ni@MWNTs. The oxidation of methanol and some kinetic parameters were investigated in KOH solution. Cyclic voltammetry was used for the electrochemical measurements. Kinetic parameters of the methanol oxidation were determined at different temperatures, scan rates, and concentrations of methanol. The surface morphologies and nickel deposition amounts of the Ni@MWNTs and Ni-C (nickel deposited graphite) electrodes were characterized with scanning electron microscope (SEM), atomic force microscope (AFM), and energy-dispersive X-ray (EDX) spectroscope. It was found that the Ni@MWNTs electrode was more active than the Ni-C electrode. The activation energy of the Ni@MWNTs electrode was calculated as 19.52 kJ mol$^{-1}$ for the methanol oxidation process.
Keywords:

Fuel cells, nanostructured materials, catalyst, composite materials, anode,

PDF

___

  • solution and a current density of 100 mA cm −2
  • was applied to the electrolysis at different times (50, 80, 100, 200, 300 s) and at 298 K to prepare the Ni@MWNTs catalyst.
Turkish Journal of Chemistry-Cover
  • ISSN: 1300-0527
  • Yayın Aralığı: 6
  • Yayıncı: TÜBİTAK
Arşiv
Sayıdaki Diğer Makaleler

Three-component synthesis of cyclic $\beta $-aminoesters using CeO$_{2}$ nanoparticles as an efficient and reusable catalyst

Javad Safaei GHOMI, Sima KALHOR, Hossein SHAHBAZI-ALAVI, Mehrnoosh ASGARI-KHEIRABADI

Synthesis of 5-aryl-$N$-(trichloroacetyl)-1,3,4-oxadiazole-2-carboxamide via three-component reaction of trichloroacetyl isocyanate, ($N$-isocyanimino)triphenylphosphorane, and benzoic acid derivatives

NAHID SHAJARI, ALI REZA KAZEMIZADEH, ALI RAMAZANI

Palladium nanoparticles supported on modified polystyrene resin as a polymeric catalyst for Sonogashira-Hagihara coupling reactions

BAHMAN TAMAMI, FATEMEH NOWROOZI DODEJI, SOHEILA GHASEMI

A comparative study on fabrication of Cu2ZnSnS4 (CZTS) nanofibers using acetate and chloride metal precursors

Mahmut KUŞ, Halit ÇAVUŞOĞLU, Faruk ÖZEL, Mustafa ERSÖZ, Burak Zafer BÜYÜKBEKAR, Hüseyin ŞAKALAK, Mustafa Selman YAVUZ

Microwave-assisted synthesis of novel 8-chloro-[1,2,4]triazolo[4,3-a]pyridine derivatives

Ming-Yan YANG, Lin-Jiong ZHANG, Zhao-Hui SUN, Xing-Hai LIU, Jian-Quan WENG, Cheng-Xia TAN, Bei-Zhen HU

Simultaneous analysis of losartan, its active metabolite, and hydrochlorothiazide in human plasma by a UPLC-MS/MS method

Priyanka A. SHAH, Primal SHARMA, Jaivik V. SHAH, Mallika SANYAL, Pranav S. SHRIVASTAV

Enhanced electrocatalytic efficiency of C/MWNTs for methanol oxidation using Ni deposited on MWNTs

Murat FARSAK, Gülfeza KARDAŞ

A comparative study on fabrication of Cu$_{2}$ZnSnS$_{4}$ (CZTS) nanofibers using acetate and chloride metal precursors

BURAK ZAFER BÜYÜKBEKAR, FARUK ÖZEL, HÜSEYİN ŞAKALAK, HALİT ÇAVUŞOĞLU, MUSTAFA ERSÖZ, MAHMUT KUŞ, MUSTAFA SELMAN YAVUZ

Three-component synthesis of cyclic β -aminoesters using CeO2 nanoparticles as an efficient and reusable catalyst

Javad GHOMI SAFAEI, Sima KALHOR, Hossein ALAVI SHAHBAZI, Mehrnoosh KHEIRABADI ASGARI

Conversion of racemic allylic hydroperoxides into corresponding chiral 1/2,3-triols by using catalytic OsO4 and chiral cinchona ligands in the absence of co-oxidant

Mehmet Serdar GÜLTEKİN, Haydar GÖKSU