Dealloyed AuNi Dendrite Anchored on a Functionalized Conducting Polymer for Improved Catalytic Oxygen Reduction and Hydrogen Peroxide Sensing in Living Cells

Naveen, M.; Gurudatt, N.G.; Noh, Hui-Bog; Shim, Yoon‐Bo

doi:10.1002/adfm.201504506

Cited by 87 publications

(43 citation statements)

References 38 publications

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“…The pH value turns out to be an important parameters for real samples and for in vivo experiments. The detection of trace H 2 O 2 released from cancer and normal cells obtained a very low detection limit of 5 nM with no interference from typical biomolecules (Figure ) …”

Section: Free‐standing 3d Electrodesmentioning

confidence: 99%

“…The detection of trace H 2 O 2 released from cancer and normal cells obtained a very low detection limit of 5 nM with no interference from typical biomolecules ( Figure 2). [123] Metal nanomaterials provide efficient detection with high sensitivity, good stability and excellent reproducibility. To further reduce the cost and avoid rare metal, future work would see more noble-metal free nanomaterials for the detection of…”

Section: Metal Based 3d Free-standing Electrodesmentioning

confidence: 99%

“…In addition, the solvent based preparation method with homogeneous composition is very promising for free-standing 3D electrode. [131] [123] . Copyright (2016)…”

Section: Metal Oxides Based Free-standing 3d Electrodesmentioning

confidence: 99%

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Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

et al. 2019

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Electrochemical detection of hydrogen peroxide has achieved rapid development, due to the wide presence in industrial production, everyday life, bioprocess and green energy chemistry, etc. Many three‐dimensional structures have emerged as state‐of‐the‐art electrocatalysts due to their fascinating structures and electrochemical properties. This review summarizes free‐standing three‐dimensional electrocatalysts based on metal, metal oxide, carbon & silicon, and unconventional materials for detection of hydrogen peroxide with low limit of detection, wide range and fast response. The work also highlights their applications in near neutral conditions, especially their ability for single cell detection and mapping in biological environment. Further exploration into these materials together with devices design will facilitate the development of next‐generation detection technologies toward in situ and real‐time detection and contribute to wearable/portable smart detection electronics.

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Section: Free‐standing 3d Electrodesmentioning

confidence: 99%

Section: Metal Based 3d Free-standing Electrodesmentioning

confidence: 99%

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Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

et al. 2019

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“…With the aim to engineer metal–air batteries with high specific energy and energy density, many alloy catalysts with high activity and stability have been widely studied, such as Pt‐based alloys, Pd‐based alloys, and Au‐based alloys . To date, the Pt‐M alloys have been known as the best catalysts for oxygen reduction reaction (ORR).…”

Section: Introductionmentioning

confidence: 99%

Engineering Bimetallic Ag–Cu Nanoalloys for Highly Efficient Oxygen Reduction Catalysts: A Guideline for Designing Ag‐Based Electrocatalysts with Activity Comparable to Pt/C‐20%

Chen

Zhang

et al. 2017

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Development of highly active and stable Pt-free oxygen reduction reaction catalysts from earth-abundant elements remains a grand challenge for highly demanded metal-air batteries. Ag-based alloys have many advantages over platinum group catalysts due to their low cost, high stability, and acceptable oxygen reduction reaction (ORR) performance in alkaline solutions. Nevertheless, compared to commercial Pt/C-20%, their catalytic activity still cannot meet the demand of commercialization. In this study, a kind of catalysts screening strategy on Ag Cu nanoalloys is reported, containing the surface modification method, studies of activity enhancement mechanism, and applied research on zinc-air batteries. The results exhibit that the role of selective dealloying (DE) or galvanic displacement (GD) is limited by the "parting limitation", and this "parting limitation" determines the surface topography, position of d-band center, and ORR performance of Ag Cu alloys. The GD-Ag Cu and DE-Ag Cu catalysts alloys present excellent ORR performance that is comparable to Pt/C-20%. The relationship between electronic perturbation and specific activity demonstrates that positive shift of the d-band center (≈0.12 eV, relative to Ag) for GD-Ag Cu is beneficial for ORR, which is contrary to Pt-based alloys (negative shift, ≈0.1 eV). Meanwhile, extensive electrochemical and electronic structure characterization indicates that the high work function of GD-Ag Cu (4.8 eV) is the reason behind their excellent durability for zinc-air batteries.

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“…Shim and co-workers anchored dealloyed AuNi dendrite to carboxyl-functionalized polyterthiophene and demonstrated the complex for ORR catalysis. [45] The negatively charged carboxyl groups stabilized the catalytic metals through complexation with positively charged metal ions. The resultant material was highly stable and had a high catalytic activity toward the ORR.…”

Section: Transition-metal Dopingmentioning

confidence: 99%

Conducting‐Polymer‐Based Materials for Electrochemical Energy Conversion and Storage

Wang

Kong

et al. 2017

Advanced Materials

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and poly(3,4-ethylenedioxythiophene) (PEDOT). The highly conjugated polymer chains can be reversibly assigned electrochemical properties by a doping/dedoping process. [9][10][11] By regulating and controlling the level of doping, their conductivities can be tuned in a wide range, from 10 −10 to 10 4 S cm, spanning the entire range from insulators to semiconductors, to conductors. [12,13] Additionally, these conducting polymers retain the advantages of traditional polymers, such as low cost, convenient preparation, good affinity to many other materials, and high flexibility and durability. Recently, great efforts have been made to exploit the applications of conducting polymers as electrocatalysts for fuel cells and as electrode materials for supercapacitors. Considering the rapidly booming efforts undertaken in this cutting-edge research area, it is necessary to highlight the new discoveries and achievements in the past several years. Here, we introduce the latest advances in conducting-polymer-based materials for fuel cells and supercapacitors, and focus on the strategies employed to improve their electrocatalytic and electrochemical performance. Conducting-Polymer-Based Catalysts for Fuel CellsFuel cells are promising green energy-conversion devices that convert chemical energy of various fuels directly into electric energy under electrochemical redox reactions. This technology provides intriguing applications in portable energy sources [14,15] and has attracted increasing attention in recent years. [16][17][18][19] Such energy-conversion systems require highly efficient electrocatalysts to trigger the oxygen reduction reaction (ORR) that occurs at the fuel cell's cathode. Platinum/ carbon (Pt/C) composite is demonstrated to be the most efficient catalyst used for fuel cells. [20][21][22] However, high price, scarcity, poor utilization efficiency, and easy carbon monoxide poisoning greatly limit its commercial applications. [23] Therefore, development of low-cost, stable, and efficient electrocatalysts for ORR is a major challenge in the field of fuel cells. [24][25][26][27][28] Owing to their highly tunable conductivity, good electrocatalytic activity, and satisfactory electrochemical stability, conducting polymers are considered to be promising electrocatalyst materials for the ORR. [29] Initially, conducting-polymer-based electrodes were fabricated through direct casting of neutral To alleviate the current energy crisis and environmental pollution, sustainable and ecofriendly energy conversion and storage systems are urgently needed. Due to their high conductivity, promising catalytic activity, and excellent electrochemical properties, conducting polymers have been attracting intense attention for use in electrochemical energy conversion and storage. Here, the latest advances regarding the utilization of conducting polymers for fuel cells and supercapacitors are introduced. The strategies employed to improve the electrocatalytic and electrochemical performances of conducting-polymerbased materials are prese...

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Dealloyed AuNi Dendrite Anchored on a Functionalized Conducting Polymer for Improved Catalytic Oxygen Reduction and Hydrogen Peroxide Sensing in Living Cells

Cited by 87 publications

References 38 publications

Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

Engineering Bimetallic Ag–Cu Nanoalloys for Highly Efficient Oxygen Reduction Catalysts: A Guideline for Designing Ag‐Based Electrocatalysts with Activity Comparable to Pt/C‐20%

Conducting‐Polymer‐Based Materials for Electrochemical Energy Conversion and Storage

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