کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
217896 463172 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
SECM screening of the catalytic activities of AuPd bimetallic patterns fabricated by electrochemical wet-stamping technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
SECM screening of the catalytic activities of AuPd bimetallic patterns fabricated by electrochemical wet-stamping technique
چکیده انگلیسی

Electrocatalyst arrays with various AuPd compositions have been deposited onto an indium tin oxide (ITO) surface by an electrochemical wet-stamping (EWETS) technique. Micropatterned high-strength agarose containing different solutions of chloroauric acid and chloropalladic acid has been used to electrodeposit and generate patterns of AuPd nanoparticle arrays on ITO. The compositions of the AuPd catalysts prepared by EWETS have been determined through a combination of energy-dispersive X-ray analysis (EDX) and X-ray diffraction spectroscopy (XRD). Field-emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM) have been employed to characterize their morphology. The electrochemical activities of the AuPd alloys for H2O2 and FcMeOH+ reduction reactions have been investigated in both redox-competition and feedback modes by means of scanning electrochemical microscopy (SECM). The results obtained from SECM images were well corroborated by calculated heterogeneous electron transfer (HET) rates for the respective AuPd electrodes, demonstrating that the SECM was applicable for the screening of multicomponent alloy catalysts and determining the optimal composition for electrocatalytic reactions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 772, 1 July 2016, Pages 96–102
نویسندگان
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