An overview on electrochemical and spectroscopic investigation of nanodispersed fuel cell catalyst activity and durability
Author
Source
The Arabian Journal for Science and Engineering. Section C, Theme issues
Issue
Vol. 35, Issue 1C(s) (30 Jun. 2010), pp.118-124, 7 p.
Publisher
King Fahd University of Petroleum and Minerals
Publication Date
2010-06-30
Country of Publication
Saudi Arabia
No. of Pages
7
Main Subjects
Topics
Abstract AR
تتعرض حفازات خلايا الوقود تحت جهد دوري لخسائر كبيرة في النشاط نتيجة تأكلها و تغير سطحها و انحلالها.
و يشير المجهر الإلكتروني النافذ (TEM) في الدورات المبكرة للجهد إلى احتمال تدخل آليتين، هما نمو جسيمات pt و انحلاله.
و قد ذكرنا أن حامل الحفاز يلعب دورا رئيسيا في تعزيز النشاط المحفز و استدامته.
كما أن حامل المحفز المكون من الماس المنشط بالبورون يمتلك مقاومة ممتازة ضد التآكل في بيئة حمضية و تحت جهد عال.
و بالتالي فإن الماس المنشط بالبورون يمكنه أن يكون بديلا جيدا للكربون.
كما أن مواد السيراميك، مثل أكاسيد المعادن يمكنها أن تكون حوامل جيدة لحفازات خلايا الوقود.
و يمكن لهذه المواد تحسين مردود تفاعل اختزال الأوكسجين و استدامه الحفاز نتيجة ارتباطه بحامله.
و قد أظهرنا على سبيل المثال تأثير حامل الحفازات على مردود اختزال الأوكسجين لكلا النظامين pd / Cو pd / TiO2.
Abstract EN
Under potential cycling, fuel cell catalysts undergo dramatic losses in activity as a result of corrosion and catalyst surface change and dissolution.
As transmission electron microscopy indicates, in the early potential cycles, two mechanisms are likely involved ; namely, Pt particles growth and Pt dissolution.
We reported that catalyst support plays a key role in enhancing catalyst activity and durability.
Support based on boron doped diamond (DD) has an excellent corrosion resistance in an acidic environment and at high potential.
Hence, BDD could be a good alternative to carbon.
Also, ceramic materials, such as metal oxides, are promising candidates as catalyst supports.
These materials can improve the oxygen reduction reaction (ORR) activity and durability due to possible interaction between catalyst and support.
We have shown, as an example, the effect of support on ORR activity for two systems, Pd / C and Pd / TiO2.
American Psychological Association (APA)
Merzougui, Belabbes. 2010. An overview on electrochemical and spectroscopic investigation of nanodispersed fuel cell catalyst activity and durability. The Arabian Journal for Science and Engineering. Section C, Theme issues،Vol. 35, no. 1C(s), pp.118-124.
https://search.emarefa.net/detail/BIM-308334
Modern Language Association (MLA)
Merzougui, Belabbes. An overview on electrochemical and spectroscopic investigation of nanodispersed fuel cell catalyst activity and durability. The Arabian Journal for Science and Engineering. Section C, Theme issues Vol. 35, no. 1C(s) (Jun. 2010), pp.118-124.
https://search.emarefa.net/detail/BIM-308334
American Medical Association (AMA)
Merzougui, Belabbes. An overview on electrochemical and spectroscopic investigation of nanodispersed fuel cell catalyst activity and durability. The Arabian Journal for Science and Engineering. Section C, Theme issues. 2010. Vol. 35, no. 1C(s), pp.118-124.
https://search.emarefa.net/detail/BIM-308334
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 123-124
Record ID
BIM-308334