کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
185360 459596 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Increased Electrochemical Oxidation Rate of Alcohols in Alkaline Media on Palladium Surfaces Electrochemically Modified by Antimony, Lead, and Tin
ترجمه فارسی عنوان
افزایش میزان اکسیداسیون الکتروشیمیایی آلکال ها در رسانه های قلیایی بر روی سطوح پالادیوم توسط الکتروشیمیایی آنتیموان، سرب و قلع
کلمات کلیدی
اکسیداسیون الکل، افزایش میزان اکسیداسیون، اکسیداسیون پلی اتیلن، اکسیداسیون الکل چند الیه، اکسیداسیون الکل در مواد قلیایی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

Several adatoms (M = Sb, Sn, or Pb) were added to Pd nanoparticles and examined for the electrochemical oxidation of ethanol, 1-propanol, 2-propanol, ethylene glycol, propylene glycol, and glycerol. We observed a significant increase in oxidation rate on Pd-M for each of the adatoms in each of the fuels. For example, the oxidation rate of ethanol was 1.5 times greater on Pd-Pb and Pd-Sn as compared with the oxidation rate on Pd after 10 minutes of oxidation. However, even more notable is the behavior observed by the polyhydric alcohols that exhibit sluggish reaction kinetics even in alkaline media. For example, the oxidation rate of propylene glycol on Pd-Pb was observed to be 21 times greater than the oxidation rate on Pd after 10 minutes, and it was still 7.1 times greater after 12 hours. These results show particular promise for the potential of efficiently oxidizing bulkier and higher energy density alcohols in the alkaline direct liquid fuel cell. All three bimetallic surfaces induced an increase in oxidation rate with all alcohols as compared to the monometallic Pd. Based on analysis of our results, we attribute a significant amount of the increase in oxidation rate to the bifunctional effect and suggest a lesser role is played by the electronic effect.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 139, 1 September 2014, Pages 302–307
نویسندگان
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