کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6601342 | 459332 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effective bioelectrocatalysis of bilirubin oxidase on electrochemically reduced graphene oxide
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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![عکس صفحه اول مقاله: Effective bioelectrocatalysis of bilirubin oxidase on electrochemically reduced graphene oxide Effective bioelectrocatalysis of bilirubin oxidase on electrochemically reduced graphene oxide](/preview/png/6601342.png)
چکیده انگلیسی
Graphene oxide (GO) was applied for construction of an effective biocathode based on bilirubin oxidase (BOD). Separation of small-sized GO sheets together with the BOD immobilisation protocol has detrimental effects on the bioelectrocatalytic reduction of oxygen. When BOD was deposited on electrochemically reduced GO (ErGO) only a negligible current density j = 2.6 μA cmâ 2 was observed. Current density dramatically increased to a value of 46 μA cmâ 2 once BOD was in-situ mixed with as-received GO directly on a glassy carbon electrode (GCE) with subsequent electrochemical reduction of the BOD/GO composite. When this protocol was tested with small-sized GO flakes separated simply using centrifugation, the fabricated biocathode exhibited j = 120 μA cmâ 2. A current density further increased to j = 280 μA cmâ 2 when BOD and purified GO were incubated ex-situ for 4 h, followed by the BOD/GO composite collection by centrifugation, its deposition on the GCE and electrochemical reduction. Moreover, oxygen reduction current increased steeply with a steady-state current density achieved at high potential (â 500 mV), close to the onset potential of oxygen reduction (â 580 mV).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 49, December 2014, Pages 70-74
Journal: Electrochemistry Communications - Volume 49, December 2014, Pages 70-74
نویسندگان
Jaroslav Filip, Jan Tkac,