Au decorated core-shell structured Au@Pt for the glucose oxidation reaction

Shim, Kyubin; Lee, Won‐Chul; Park, Min; Shahabuddin, Mohammed; Yamauchi, Yusuke; Hossain, Md. Shahriar A.; Shim, Yoon‐Bo; Kim, Jung Ho

doi:10.1016/j.snb.2018.09.048

Cited by 84 publications

(44 citation statements)

References 42 publications

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“…Among the oxidoreductase nanozymes, peroxidase-and oxidase-mimicking nanomaterials are mostly explored for electrochemical biosensors (Table 1). The common nanomaterials with peroxidase mimetics includes metal nanoparticles (AuNPs, 50 PdNPs 51 ), metal oxides (Fe2O3, 52,53 Au-NPFe2O3NC, 54,55 Fe3O4 MNP, 56 CeO2/NiO, 57 and CuO 58 ), core-shell nanostructure(Au@Pt 59 ), dendrite (dealloyed-AuNi@pTBA, 60 Cu-Co alloy dendrite 61 ), carbonbased composite(GO-AuNP, 62 His@AuNCs/rGO, 63 PtNPs decorated CNT 64 ), and metal-organic frameworks (MOFs). Unlike other nanomaterials, MOFs have drawn enormous interest as a new class of nanozymes due to their uniform cavities which are likely to provide biomimetic active centers and enzyme-like pseudo-substrate-binding pockets.…”

Section: Common Nanozymes For Electrochemical Biosensorsmentioning

confidence: 99%

Nanozyme-based electrochemical biosensors for disease biomarker detection

Mahmudunnabi

Farhana

Kashaninejad

et al. 2020

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Section: Common Nanozymes For Electrochemical Biosensorsmentioning

confidence: 99%

Nanozyme-based electrochemical biosensors for disease biomarker detection

Mahmudunnabi

Farhana

Kashaninejad

et al. 2020

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“…In particular, the catalytic efficiency can be easily improved through a large surface-to-volume ratio. In addition to these methods, composition changes to partially replace the Pt by the addition of carbon and/or metals (Fe, Co, Ni, Pd, Au, and Ag) have also been accelerated for greater catalytic activity and durability 10–18 .…”

Section: Introductionmentioning

confidence: 99%

Rationally designed bimetallic Au@Pt nanoparticles for glucose oxidation

Shim

Lee

Heo

et al. 2019

Sci Rep

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Bimetallic nanoparticles (NPs) have aroused interest in various fields because of their synergetic and unique properties. Among those nanoparticles, we strategically approached and synthesized Au@Pt NPs via the sonochemical method with different molar ratios (e.g. 3:7, 5:5, and 7:3) of Au to Pt precursors. The particle structure was confirmed to be core-shell, and the size was estimated to be 60, 52, and 47 nm, respectively, for 3:7, 5:5, and 7:3 ratios of Au to Pt. The detailed structure and crystallinity of as-prepared Au@Pt NPs were further studied by scanning electron microscopy, transmission electron microscopy with element mapping, and X-ray diffraction. It should be noted that thickness of the dendritic Pt shell in the core-shell structure can be easily tuned by controlling the molar ratio of Au to Pt. To explore the possibility of this material as glucose sensor, we confirmed the detection of glucose using amperometry. Two dynamic ranges in a calibration plot were displayed at 0.5–50.0 µM and 0.05–10.0 mM, and their detection limit as glucose sensor was determined to be 319.8 (±5.4) nM.

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“…The surface Pt-rich bimetallic nanocatalysts with different Au/Pt atomic ratios have demonstrated enhanced hydrogenation selectivity or activity than AuPt alloys and monometallic Pt nanomaterials [20,21]. In addition, Au@Pt NPs showed the highest response current for the catalytic oxidation of glucose solution compared with those of Pt and Au NPs [22,23]. Recent theoretical predictions showed that the PtAu surface avoids the CO formation and apparently exhibits higher CO-poisoning tolerance when compared with the Pt@Pd surface [24].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Au@Pt Core—Shell Nanoparticles as Efficient Electrocatalyst for Methanol Electro-Oxidation

et al. 2019

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Bimetallic Au@Pt nanoparticles (NPs) with Pt monolayer shell are of much interest for applications in heterogeneous catalysts because of enhanced catalytic activity and very low Pt-utilization. However, precisely controlled synthesis with uniform Pt-monolayers and stability on the AuNPs seeds remain elusive. Herein, we report the controlled deposition of Pt-monolayer onto uniform AuNPs seeds to obtain Au@Pt core–shell NPs and their Pt-coverage dependent electrocatalytic activity for methanol electro-oxidation. The atomic ratio between Au/Pt was effectively tuned by varying the precursor solution ratio in the reaction solution. The morphology and atomic structure of the Au@Pt NPs were analyzed by high-resolution scanning transmission electron microcopy (HR-STEM) and X-ray diffraction (XRD) techniques. The results demonstrated that the Au@Pt core–shell NPs with Pt-shell thickness (atomic ratio 1:2) exhibit higher electrocatalytic activity for methanol electro-oxidation reaction, whereas higher and lower Pt ratios showed less overall catalytic performance. Such higher catalytic performance of Au@Pt NPs (1:2) can be attributed to the weakened CO binding on the Pt/monolayers surface. Our present synthesis strategy and optimization of the catalytic activity of Au@Pt core–shell NPs catalysts provide promising approach to rationally design highly active catalysts with less Pt-usage for high performance electrocatalysts for applications in fuel cells.

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Au decorated core-shell structured Au@Pt for the glucose oxidation reaction

Cited by 84 publications

References 42 publications

Nanozyme-based electrochemical biosensors for disease biomarker detection

Nanozyme-based electrochemical biosensors for disease biomarker detection

Rationally designed bimetallic Au@Pt nanoparticles for glucose oxidation

Synthesis of Au@Pt Core—Shell Nanoparticles as Efficient Electrocatalyst for Methanol Electro-Oxidation

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