Electrocatalytic activity of a novel titanium-supported nanoporous gold catalyst for glucose oxidation

Yi, Qingfeng; Yu, Wenqiang

doi:10.1007/s00604-009-0148-0

Cited by 36 publications

(30 citation statements)

References 34 publications

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“…Two cathodic reduction peaks (r1, r2) at ca. 0.082 V and À 0.135 V are registered, which is similar to the observation at a polycrystalline Au and Au nanoparticle catalysts [12]. With the increase of ruthenium contents in the bimetallic Au À Ru catalysts, the anodic currents in the potential range of ca.…”

Section: Resultssupporting

confidence: 75%

“…3a) showing a low electrooxidation current of glucose. In our previous papers, we reported the successful preparation of nanoporous gold particles using the hydrothermal process [12]. It was found that nanoporous gold particles were stably immobilized on the Ti substrate by using polyethylene glycol (PEG) as the reduction agent.…”

Section: Resultsmentioning

confidence: 99%

“…In our recent papers, we reported the preparation of a titanium-supported nanoporous gold electrode which presented high electroactivity for the electrochemical oxidation of glucose and hydrazine in alkaline solutions [12,42]. The purpose of this work is to fabricate binary gold-ruthenium nanoparticles in order to develop novel electrocatalysts applied to the glucose electro oxidation.…”

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confidence: 99%

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Novel Nanoporous Binary AuRu Electrocatalysts for Glucose Oxidation

Niu

2010

Electroanalysis

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In this work, we study the fabrication, structural characterization, and electrochemical activity of titanium-supported binary AuÀRu catalysts for glucose oxidation. The catalysts including Au 99 Ru 1 , Au 95 Ru 5 , Au 93 Ru 7 and Au 88 Ru 12 were prepared by a hydrothermal method using formaldehyde as a reduction agent. The morphologies of the prepared AuÀRu catalyst structures are characterized by porous dendritic particles with roughened surfaces with nano-sized flakes. Electrochemical catalytic activity of the binary AuÀRu catalysts towards glucose oxidation in alkaline solutions was investigated using cyclic voltammetry and chronoamperometry. All binary AuÀRu catalysts facilitate glucose oxidation at the lower potentials and deliver higher anodic oxidation currents compared to pure Au catalyst. Among them, the binary Au 95 Ru 5 catalyst presents the most negative onset potential of À 0.872 V (vs. Ag/AgCl, 3 M KCl) for glucose oxidation in 0.1 M NaOH solution. For the Au 95 Ru 5 catalyst, chronoamperometric data at the potential step of À 0.65 V (vs. Ag/AgCl,3 M KCl) exhibit a well linear dependence of the anodic oxidation current density on glucose concentration in the range of 0 to 15 mM glucose.

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Novel Nanoporous Binary AuRu Electrocatalysts for Glucose Oxidation

Niu

2010

Electroanalysis

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“…In this method, a fairly high concentration of HAuCl 4 was mixed with a reducing agent (e.g., ammonium formate, formaldehyde, and polyethylene glycol) and heated in an autoclave at 180 ∘ C for 8-10 hr. The Au-coated substrates were then annealed at 200-250 ∘ C under argon for several hours [174,[180][181][182]. The structure of these materials is a bit different than those formed by dealloying consisting of an aggregate network of gold nanoparticles that range in size of 50-500 nm forming pores/openings that are 10s to 100s of nanometers in size.…”

Section: Other Nanoporous Gold Sensorsmentioning

confidence: 99%

“…as a nonenzymatic sensor to detect glucose with a reported detection limit of 14.8 M [181], glucose-oxidase-based sensor to detect glucose with a reported detection limit of 2.5 M [180], horseradish-peroxidase-immobilized sensor to detect hydrogen peroxide (detection limit of 2 × 10 −8 M) [182], and in the detection of cholesterol [174]. A roughness factor of 5.9 [174] and 19 [181] has been reported.…”

Section: Other Nanoporous Gold Sensorsmentioning

confidence: 99%

Nanoporous Gold Electrodes and Their Applications in Analytical Chemistry

Collinson

2013

ISRN Analytical Chemistry

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Nanoporous gold prepared by dealloying Au:Ag alloys has recently become an attractive material in the field of analytical chemistry. This conductive material has an open, 3D porous framework consisting of nanosized pores and ligaments with surface areas that are 10s to 100s of times larger than planar gold of an equivalent geometric area. The high surface area coupled with an open pore network makes nanoporous gold an ideal support for the development of chemical sensors. Important attributes include conductivity, high surface area, ease of preparation and modification, tunable pore size, and a bicontinuous open pore network. In this paper, the fabrication, characterization, and applications of nanoporous gold in chemical sensing are reviewed specifically as they relate to the development of immunosensors, enzyme-based biosensors, DNA sensors, Raman sensors, and small molecule sensors.

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Analyzing Electrochemical Sensing Fundamentals for Health Applications

Alam,

Mitea,

Howlader

et al. 2023

Advanced Sensor Research

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Humans continuously interact with physical, chemical, and biological environments that influence their health, safety, and quality of life. Sensing devices, such as electrochemical sensors that translate environmental qualities into electrical signals, are crucial for detecting biomarker concentrations in various biofluids. However, the understanding of electrochemical sensing is often incomplete, necessitating further study of chemical reactions and sensor‐electrode interactions for healthcare applications. This review analyzes crucial topics in chemical reactions in electrochemical sensing environments. First, the dynamics of chemical energy, the roles of acidic and alkaline fluids, chemical reaction tendencies, thermodynamic equilibria, Gibbs free energy, water dissociation, and the pH scale are discussed. Sensor materials or biomarkers undergo oxidation and reduction reactions in electrochemical sensing. Oxygen‐derived radicals and nonradical reactive species significantly influence biochemical reactions, cellular responses, and clinical outcomes. Then, the review delves into the impact of oxidation reduction reactions on human pathophysiology, redox reactions in hemoglobin, redox environments in human serum albumin and cells/tissues, and thermodynamics of biological redox reactions. Finally, recent advances in electrochemical techniques are presented and research challenges and future perspectives in electrochemical sensing for health applications are addressed.

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Electrocatalytic activity of a novel titanium-supported nanoporous gold catalyst for glucose oxidation

Cited by 36 publications

References 34 publications

Novel Nanoporous Binary AuRu Electrocatalysts for Glucose Oxidation

Novel Nanoporous Binary AuRu Electrocatalysts for Glucose Oxidation

Nanoporous Gold Electrodes and Their Applications in Analytical Chemistry

Analyzing Electrochemical Sensing Fundamentals for Health Applications

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