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A Novel Method for Synthesis of OMC ...

Worku, Dereje G.

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A Novel Method for Synthesis of OMC and M-OMC for PEM Fuel Cell Pt-electrocatalyst.

Record Type:	Electronic resources : Monograph/item
Title/Author:	A Novel Method for Synthesis of OMC and M-OMC for PEM Fuel Cell Pt-electrocatalyst./
Author:	Worku, Dereje G.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	45 p.
Notes:	Source: Masters Abstracts International, Volume: 56-02.
Contained By:	Masters Abstracts International56-02(E).
Subject:	Chemical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10167862
ISBN:	9781369221909

A Novel Method for Synthesis of OMC and M-OMC for PEM Fuel Cell Pt-electrocatalyst.
Worku, Dereje G.

A Novel Method for Synthesis of OMC and M-OMC for PEM Fuel Cell Pt-electrocatalyst. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 45 p.

Source: Masters Abstracts International, Volume: 56-02.

Thesis (M.S.)--North Carolina Agricultural and Technical State University, 2016.

Abstract Commercialization of polymer electrolyte membrane fuel cell (PEMFC) has become an important challenge since platinum (Pt), which is being used as the primary catalyst is highly expensive and susceptible to CO poisoning. Thus improving the catalytic efficiency and increase CO tolerance of the electrocatalyst is vital for commercialization of PEMFC. The aim of this research is to synthesize ordered mesoporous carbon (OMC) and modified ordered mesoporous carbon (mOMC) supports with high surface area that will allow low platinum loading minimizing the cost. OMC is synthesized using house made SBA-15 as a template whereas the mOMC is synthesized using 10%M/SBA-15 (M: Ni, Co, Fe, W) as templates and sugar as a carbon source prepared via impregnation method that is optimized through different techniques such as selection of precursor, precursor solvent, and its pH medium. The mOMCs with high surface area and improved electrical conductivity, and durability are obtained by optimizing the parameters employed in the synthesis processes of mOMC such as carbonization temperature. The objective of using mOMC as catalyst support is but not limited to enhance the transport of reactant gases by providing uniform interconnected pores and higher uniform Pt dispersion. The catalysts were tested for performance and polarization on 5 cm 2 membrane electrode assembly (MEAs) for 20 wt% Pt loading under controlled experimental conditions using well equipped Fuel Cell Testing Station (Model 850, Scribner Associates Inc.). The synthesized OMC and mOMC were also characterized by nitrogen adsorption desorption analysis (BET), and x-ray diffraction (XRD) to determine the pore size, specific surface area, and the ordered structure. BET analysis of the OMC and mOMC synthesized shows a specific surface area and pore size of 1239 m2/g (3.73 nm), 1228 m2/g (3.67nm) ,1321 m2/g (3.73 nm) and 1367 m2/g (3.59 nm) for Co, Ni, Fe, and W respectively with OMC being the highest with specific surface area of 1629 m2/g and pore size of 3.44 nm.

ISBN: 9781369221909Subjects--Topical Terms:

560457
Chemical engineering.

A Novel Method for Synthesis of OMC and M-OMC for PEM Fuel Cell Pt-electrocatalyst.
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245 1 2 $a A Novel Method for Synthesis of OMC and M-OMC for PEM Fuel Cell Pt-electrocatalyst.
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300 $a 45 p.
500 $a Source: Masters Abstracts International, Volume: 56-02.
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520 $a Abstract Commercialization of polymer electrolyte membrane fuel cell (PEMFC) has become an important challenge since platinum (Pt), which is being used as the primary catalyst is highly expensive and susceptible to CO poisoning. Thus improving the catalytic efficiency and increase CO tolerance of the electrocatalyst is vital for commercialization of PEMFC. The aim of this research is to synthesize ordered mesoporous carbon (OMC) and modified ordered mesoporous carbon (mOMC) supports with high surface area that will allow low platinum loading minimizing the cost. OMC is synthesized using house made SBA-15 as a template whereas the mOMC is synthesized using 10%M/SBA-15 (M: Ni, Co, Fe, W) as templates and sugar as a carbon source prepared via impregnation method that is optimized through different techniques such as selection of precursor, precursor solvent, and its pH medium. The mOMCs with high surface area and improved electrical conductivity, and durability are obtained by optimizing the parameters employed in the synthesis processes of mOMC such as carbonization temperature. The objective of using mOMC as catalyst support is but not limited to enhance the transport of reactant gases by providing uniform interconnected pores and higher uniform Pt dispersion. The catalysts were tested for performance and polarization on 5 cm 2 membrane electrode assembly (MEAs) for 20 wt% Pt loading under controlled experimental conditions using well equipped Fuel Cell Testing Station (Model 850, Scribner Associates Inc.). The synthesized OMC and mOMC were also characterized by nitrogen adsorption desorption analysis (BET), and x-ray diffraction (XRD) to determine the pore size, specific surface area, and the ordered structure. BET analysis of the OMC and mOMC synthesized shows a specific surface area and pore size of 1239 m2/g (3.73 nm), 1228 m2/g (3.67nm) ,1321 m2/g (3.73 nm) and 1367 m2/g (3.59 nm) for Co, Ni, Fe, and W respectively with OMC being the highest with specific surface area of 1629 m2/g and pore size of 3.44 nm.
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