Estimation of the chemical specific surface area of catalytic nanoparticles by TEM images analysis

• Autorzy: Pawlyta M. , Sobel B. , Liszka B.

Identyfikatory

DOI

10.5604/01.3001.0012.0733

• Języki publikacji: EN

Abstrakty

EN

Purpose: The purpose of this article is the development of quantitative methods for assessing the quality of nanocomposite materials used in fuel cells. Design/methodology/approach: latinum is the most commonly used catalyst in fuel cells, commonly in the form of nanoparticles deposited on the surface of carbon black. Due to the nanometric size of platinum particles, transmission electron microscopy can be applied to evaluate the produced catalysts. TEM image also allow to determinate the approximate value of the chemical specific surface area) of platinum nanoparticles, but only in case of spherical particles. Findings: In present work, taking into account additional assumptions resulting directly from the analysis of microscopic images, the method of estimation of the particle diameter and the chemical specific surface area for nonsymmetrical (elongated) nanoparticles is present. Research limitations/implications: The presented work presents a method for determining the specific surface of platinum, when their shape is elongated. It is worth noting that the modified formulas for determining the particle diameter and the value of the chemically active specific surface of the platinum nanoparticles of the elongated shape are equivalent to the formulas previously given for spherical particles, if the particle length and its diameter are equal. In this case, patterns for symmetric particles and more general (modified) patterns can be used interchangeably. Practical implications: Development of new and more effective catalysts for fuel cells. Originality/value: The significance of the presented work results from the possibility of using the described method in the catalyst studies during real catalytic processes. It allows comparing catalytic activity after the process, also in unusual conditions and in an aggressive environment, using minimal amounts of material.

Słowa kluczowe

EN

TEM; nanocomposite; fuel cells; carbon black; platinum

PL

TEM; nanokompozyt; ogniwa paliwowe; sadza; platyna

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2018
• Tom: Vol. 87, nr 1
• Strony: 5--12
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Pawlyta M.

• Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Sobel B.

• Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Liszka B.

• Faculty of Earth Sciences, University of Silesia, ul. Będzińska 60, 41-200 Sosnowiec, Poland

Bibliografia

• [1] W.S. Rasband. lmageJ: Image processing and analysis in Java, Astrophysics Source Code Library, 2012.
• [2] L.E. Murr, Nanoparticulate minerials in antiquity: The good, the bad and the ugly, Materials Characterization 60/4 (2009) 261-270.
• [3] J.B. Donnet (Ed. ), Carbon black: science and technology, CRC Press, 1993.
• [4] A.T. Bell, The impact of nanoscience on heterogeneous catalysis, Science 299/5613 (2003) 1688-1691.
• [5] A. Małek, M. Wendeker, PEM fuel cells: theory and practice, Lublin University of Technology Publishing House, 2010 (in Polish).
• [6] M. Carmo, A.R. Dos Santos, J.G.R. Poco, M. Linardi, Physical and electrochemical evaluation of commercial carbon black as clectrocatalysts supports for DMFC applications, Journal of Power Sources 173/2 (2007) 860-866.
• [7] E. Antolini, Carbon supports for low-temperature fuel cell catalysts, Applied Catalysis B: Environmental 88/1 (2009) 1-24.
• [8] M. Uchida, Y. Aoyama, M. Tanabe, N. Yanagihara, N. Eda, A. Ohta, Influences of both carbon supports and heat-treatment of supported catalyst on electrochemical oxidation of methanol, Journal of the Electrochemical Society 142/8 ( 1995) 2572-2576.
• [9] X. Yu, S. Ye, Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC: Part I. Physico-chemical and electronic interaction between Pt and carbon support, and activity enhancement of Pt/C catalyst, Journal of Power Sources 172/1 (2007) 133-144.
• [10] K. Sohlberg, T.J. Pennycook, W. Zhou, S.J. Pennycook, Insights into the physical chemistry of materials from advances in HAADF-STEM, Physical Chemistry Chemical Physics 17/6 (2015) 3982-4006.
• [11] S.J. Pennycook, N.D. Browning, M.M. McGibbon, A.J. McGibbon, D.E. Jesson, M.F. Chisholm, Direct determination of interface structure and bonding with the scanning transmission electron microscope, Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences 354/1719 (1996) 2619-2634.
• [12] Y. Shao, G. Yin, Y. Gao, P. Shi, Durability Study of Pt/C and Pt/CNTs Catalysts under Simulated PEM Fuel Cell Conditions, Journal of the Electrochcmical Society 153/6 (2006) A1093-A1097.
• [13] L.H. Li, W.D. Zhang, Preparation of carbon nanotubes supported platinum nanoparticles by an organic colloidal process for nonenzymatic glucose sensing, Microchimica Acta 163/3-4 (2008) 305-311.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).