Effect of Electrolyte and Adsorbates on Charging Rates in Mesoporous Gold Electrodes

Robinson, David B.; Wu, Chung-An Max; Ong, Markus D.; Jacobs, Benjamin W.; Pierson, Bonnie E.

doi:10.1021/la903816f

Cited by 19 publications

(20 citation statements)

References 65 publications

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“…Nanoporous electrodes have also be entermed "microporous" or "mesoporous" electrodes [18,[32][33][34][35][36] as this is the IUPAC definition of a material with 0.2-2 nm and 2-50 nm pores, respectively. They may also be referred to as nanoporous foams [37], particularly when they are in a monolithic form.…”

Section: What Are Nanoporous Gold Electrodes?mentioning

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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Section: What Are Nanoporous Gold Electrodes?mentioning

confidence: 99%

Nanoporous Gold Electrodes and Their Applications in Analytical Chemistry

Collinson

2013

ISRN Analytical Chemistry

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“…Porous nanostructures have received great attention because of their wide-ranging applications, such as in lithium-ion batteries [1][2][3], ion exchange membranes [4], catalysis supports [5][6][7][8], solar cells [9], and supercapacitor electrodes [10][11][12][13][14] due to their high surface area and enhanced interaction with the environment [15]. In the case of charge storage applications, transition metal oxide nanostructures are attractive candidates by virtue of their excellent pseudocapacitive behavior and high electrical conductivity [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes

et al. 2010

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We report a facile way to grow various porous NiO nanostructures including nanoslices, nanoplates, and nanocolumns, which show a structure-dependence in their specific charge capacitances. The formation of controllable porosity is due to the dehydration and re-crystallization of β-Ni(OH) 2 nanoplates synthesized by a hydrothermal process. Thermogravimetric analysis shows that the decomposition temperature of the β-Ni(OH) 2 nanostructures is related to their morphology. In electrochemical tests, the porous NiO nanostructures show stable cycling performance with retention of specific capacitance over 1000 cycles. Interestingly, the formation of nanocolumns by the stacking of β-Ni(OH) 2 nanoslices/plates favors the creation of small pores in the NiO nanocrystals obtained after annealing, and the surface area is over five times larger than that of NiO nanoslices and nanoplates. Consequently, the specific capacitance of the porous NiO nanocolumns (390 F/g) is significantly higher than that of the nanoslices (176 F/g) or nanoplates (285 F/g) at a discharge current of 5 A/g. This approach provides a clear illustration of the process-structure-property relationship in nanocrystal synthesis and potentially offers strategies to enhance the performance of supercapacitor electrodes.

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“…The common electrode materials which are recently use in electrochemical capacitors are carbon, transition metal oxides and conducting polymers. Nanostructured materials are gaining a great interest due to their wide applications in various fields such as lithium-ion batteries [3][4][5], ion exchange membranes [6], catalysis supports [7][8][9][10], solar cells [11] and supercapacitor electrodes [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Phase Pure NiO Nanoparticles via the Combustion Route using Different Organic Fuels for Electrochemical Capacitor Applications

Srikesh¹,

Nesaraj²

2015

Journal of Electrochemical Science and Technology

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Transition metal oxide nanocrystalline materials are playing major role in energy storage application in this scenario. Nickel oxide is one of the best antiferromagnetic materials which is used as electrodes in energy storage devices such as, fuel cells, batteries, electrochemical capacitors, etc. In this research work, nickel oxide nanoparticles were synthesized by combustion route in presence of organic fuels such as, glycine, glucose and and urea. The prepared nickel oxide nanoparticles were calcined at 600 o C for 3 h to get phase pure materials. The calcined nanoparticles were preliminarily characterized by XRD, particle size analysis, SEM and EDAX. To prepare nickel oxide electrode materials for application in supercapacitors, the calcined NiO nanoparticles were mixed with di-methyl-acetamide and few drops of nafion solution for 12 to 16 h. The above slurry was coated in the graphite sheet and dried at 50 o C for 2 to 4 h in a hot air oven to remove organic solvent. The dried sample was subjected to electrochemical studies, such as cyclic voltammetry, AC impedance analysis and chrono-coulometry studies in KOH electrolyte medium. From the above studies, it was found that nickel oxide nanoparticles prepared by combustion synthesis using glucose as a fuel exhibited resulted in low particle diameter (42.23 nm). All the nickel oxide electrodes have shown better good capacitance values suitable for electrochemical capacitor applications.

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Effect of Electrolyte and Adsorbates on Charging Rates in Mesoporous Gold Electrodes

Cited by 19 publications

References 65 publications

Nanoporous Gold Electrodes and Their Applications in Analytical Chemistry

Nanoporous Gold Electrodes and Their Applications in Analytical Chemistry

Synthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes

Synthesis and Characterization of Phase Pure NiO Nanoparticles via the Combustion Route using Different Organic Fuels for Electrochemical Capacitor Applications

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