کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1285640 1497928 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Palladium/nickel bifunctional electrocatalyst for hydrogen oxidation reaction in alkaline membrane fuel cell
ترجمه فارسی عنوان
الکتروکاتالیست بیفکنی پالادیوم / نیکل برای واکنش اکسیداسیون هیدروژن در سلول سوختی قلیایی
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Best reported power in AMFCs for non-Pt catalyst (anode and cathode).
• Detailed structural characterization (HRTEM and EDS mapping).
• Electrochemical measurements in RDE and AMFCs to propose a mechanism.

Investigation of the hydrogen oxidation reaction (HOR) in alkaline media has been pursued in the past few years side by side with the development of alkaline membrane fuel cells (AMFCs), also called anion exchange membrane fuel cells (AEM-FCs). In this communication, we present the synthesis, electrochemistry and AMFC test of a platinum-free HOR catalyst. The anode catalyst is prepared by growing palladium nanoparticles onto nanoparticles of an oxophilic metal (nickel), resulting in nano-dispersed, interconnected crystalline phases of Ni and Pd. When used in the anode of a hydrogen/air AMFC, such Pd/Ni catalyst exhibits high HOR activity, resulting in record high performance for a platinum-free AMFC (0.4 A cm−2 at 0.6 V vs RHE). The enhancement of HOR catalytic activity vs. that observed at Pd (or Ni) alone is revealed directly in rotating disc electrode tests of this Pd/Ni catalyst that shows a significant negative shift (200 mV) of the onset potential for the HOR current vs. the case of Pd.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 304, 1 February 2016, Pages 332–339
نویسندگان
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