Fundamental Mechanistic Understanding of Electrocatalysis of Oxygen Reduction on Pt and Non-Pt Surfaces : Acid versus Alkaline Media
المؤلفون المشاركون
Mukerjee, Sanjeev
Ramaswamy, Nagappan
المصدر
Advances in Physical Chemistry
العدد
المجلد 2012، العدد 2012 (31 ديسمبر/كانون الأول 2012)، ص ص. 1-17، 17ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2012-03-20
دولة النشر
مصر
عدد الصفحات
17
التخصصات الرئيسية
الملخص EN
Complex electrochemical reactions such as Oxygen Reduction Reaction (ORR) involving multi-electron transfer is an electrocatalytic inner-sphere electron transfer process that exhibit strong dependence on the nature of the electrode surface.
This criterion (along with required stability in acidic electrolytes) has largely limited ORR catalysts to the platinum-based surfaces.
New evidence in alkaline media, discussed here, throws light on the involvement of surface-independent outer-sphere electron transfer component in the overall electrocatalytic process.
This surface non-specificity gives rise to the possibility of using a wide-range of non-noble metal surfaces as electrode materials for ORR in alkaline media.
However, this outer-sphere process predominantly leads only to peroxide intermediate as the final product.
The importance of promoting the electrocatalytic inner-sphere electron transfer by facilitation of direct adsorption of molecular oxygen on the active site is emphasized by using pyrolyzed metal porphyrins as electrocatalysts.
A comparison of ORR reaction mechanisms between acidic and alkaline conditions is elucidated here.
The primary advantage of performing ORR in alkaline media is found to be the enhanced activation of the peroxide intermediate on the active site that enables the complete four-electron transfer.
ORR reaction schemes involving both outer- and inner-sphere electron transfer mechanisms are proposed.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Ramaswamy, Nagappan& Mukerjee, Sanjeev. 2012. Fundamental Mechanistic Understanding of Electrocatalysis of Oxygen Reduction on Pt and Non-Pt Surfaces : Acid versus Alkaline Media. Advances in Physical Chemistry،Vol. 2012, no. 2012, pp.1-17.
https://search.emarefa.net/detail/BIM-475869
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Ramaswamy, Nagappan& Mukerjee, Sanjeev. Fundamental Mechanistic Understanding of Electrocatalysis of Oxygen Reduction on Pt and Non-Pt Surfaces : Acid versus Alkaline Media. Advances in Physical Chemistry No. 2012 (2012), pp.1-17.
https://search.emarefa.net/detail/BIM-475869
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Ramaswamy, Nagappan& Mukerjee, Sanjeev. Fundamental Mechanistic Understanding of Electrocatalysis of Oxygen Reduction on Pt and Non-Pt Surfaces : Acid versus Alkaline Media. Advances in Physical Chemistry. 2012. Vol. 2012, no. 2012, pp.1-17.
https://search.emarefa.net/detail/BIM-475869
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-475869
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر