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Pt-decorated nanoporous gold for glucose electrooxidation in neutral and alkaline solutions.

Yan X, Ge X, Cui S - Nanoscale Res Lett (2011)

Bottom Line: Pt-decorated nanoporous gold (NPG-Pt), created by depositing a thin layer of Pt on NPG surface, was proposed as an active electrode for glucose electrooxidation in neutral and alkaline solutions.The electrocatalytic activity toward glucose oxidation in neutral and alkaline solutions was evaluated, which was found to depend strongly on the surface structure of NPG-Pt.A direct glucose fuel cell (DGFC) was performed based on the novel membrane electrode materials.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China. xiuling1212@gmail.com.

ABSTRACT
Exploiting electrocatalysts with high activity for glucose oxidation is of central importance for practical applications such as glucose fuel cell. Pt-decorated nanoporous gold (NPG-Pt), created by depositing a thin layer of Pt on NPG surface, was proposed as an active electrode for glucose electrooxidation in neutral and alkaline solutions. The structure and surface properties of NPG-Pt were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and cyclic voltammetry (CV). The electrocatalytic activity toward glucose oxidation in neutral and alkaline solutions was evaluated, which was found to depend strongly on the surface structure of NPG-Pt. A direct glucose fuel cell (DGFC) was performed based on the novel membrane electrode materials. With a low precious metal load of less than 0.3 mg cm-2 Au and 60 μg cm-2 Pt in anode and commercial Pt/C in cathode, the performance of DGFC in alkaline is much better than that in neutral condition.

No MeSH data available.


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Typical SEM (a) and TEM (b) images of the NPG-Pt 64 sample.
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Figure 1: Typical SEM (a) and TEM (b) images of the NPG-Pt 64 sample.

Mentions: NPG-Pt samples were fabricated by chemical plating a thin layer of Pt on NPG ligament surfaces. Figure 1a shows the wide scan SEM image of the as prepared NPG-Pt, which exhibits a three-dimensional continuous nanoporous structure, similar to the reported NPG [20]. Such structure is highly desirable in electrocatalysis because of its structural integrity and electron conductivity. TEM observation (Figure 1b) clearly reveals that for heavily plated samples, the deposited Pt form nanoislands uniformly coating on NPG surface. Previous studies have proved that these Pt islands adopt a conformal and epitaxial relationship to the NPG substrate [24]. The amount and size of the Pt islands are controlled by varying the reaction time. According to ICP-AES results, plating for 8 and 64 min (signed as NPG-Pt 8 and NPG-Pt 64, respectively) resulted in a Pt loading of approximately 6 and 20 μg cm-2 in the final products, respectively.


Pt-decorated nanoporous gold for glucose electrooxidation in neutral and alkaline solutions.

Yan X, Ge X, Cui S - Nanoscale Res Lett (2011)

Typical SEM (a) and TEM (b) images of the NPG-Pt 64 sample.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211400&req=5

Figure 1: Typical SEM (a) and TEM (b) images of the NPG-Pt 64 sample.
Mentions: NPG-Pt samples were fabricated by chemical plating a thin layer of Pt on NPG ligament surfaces. Figure 1a shows the wide scan SEM image of the as prepared NPG-Pt, which exhibits a three-dimensional continuous nanoporous structure, similar to the reported NPG [20]. Such structure is highly desirable in electrocatalysis because of its structural integrity and electron conductivity. TEM observation (Figure 1b) clearly reveals that for heavily plated samples, the deposited Pt form nanoislands uniformly coating on NPG surface. Previous studies have proved that these Pt islands adopt a conformal and epitaxial relationship to the NPG substrate [24]. The amount and size of the Pt islands are controlled by varying the reaction time. According to ICP-AES results, plating for 8 and 64 min (signed as NPG-Pt 8 and NPG-Pt 64, respectively) resulted in a Pt loading of approximately 6 and 20 μg cm-2 in the final products, respectively.

Bottom Line: Pt-decorated nanoporous gold (NPG-Pt), created by depositing a thin layer of Pt on NPG surface, was proposed as an active electrode for glucose electrooxidation in neutral and alkaline solutions.The electrocatalytic activity toward glucose oxidation in neutral and alkaline solutions was evaluated, which was found to depend strongly on the surface structure of NPG-Pt.A direct glucose fuel cell (DGFC) was performed based on the novel membrane electrode materials.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China. xiuling1212@gmail.com.

ABSTRACT
Exploiting electrocatalysts with high activity for glucose oxidation is of central importance for practical applications such as glucose fuel cell. Pt-decorated nanoporous gold (NPG-Pt), created by depositing a thin layer of Pt on NPG surface, was proposed as an active electrode for glucose electrooxidation in neutral and alkaline solutions. The structure and surface properties of NPG-Pt were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and cyclic voltammetry (CV). The electrocatalytic activity toward glucose oxidation in neutral and alkaline solutions was evaluated, which was found to depend strongly on the surface structure of NPG-Pt. A direct glucose fuel cell (DGFC) was performed based on the novel membrane electrode materials. With a low precious metal load of less than 0.3 mg cm-2 Au and 60 μg cm-2 Pt in anode and commercial Pt/C in cathode, the performance of DGFC in alkaline is much better than that in neutral condition.

No MeSH data available.


Related in: MedlinePlus