Microstructure and electrocatalytic performance of nanoporous gold foils decorated by TiO2 coatings

Chen, Ay Y.; Shi, S. S.; Wang, Jw W.; Liu, F.; Wang, F.; Wang, Y.; Ruan, Haihui; Xie, Xiaofeng

doi:10.1016/j.surfcoat.2015.10.014

Cited by 10 publications

(3 citation statements)

References 38 publications

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“…NPG-based electrocatalysts for the GOR have emerged in recent years [23][24][25][26] and are promising owing to their porous morphology, better anti-poisoning of carbon monoxide, good biological compatibility and high catalytic activity for some oxidation reactions. 27,28 However, the current methods for preparing NPG have clear limitations and cannot satisfy the requirements for integrated preparation of electrocatalysts on functional substrates and further fabrication of the DGFC.…”

mentioning

confidence: 99%

Enhancing the Glucose Oxidation on Nanocrystalline Au Thin-Films by Integrating Nanoporous Framework and Structural Defects

Zhang

Yang

Chen

et al. 2019

J. Electrochem. Soc.

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To realize the commercial feasibility of nanoporous metal-based electrocatalysts in fuel cells, there is a need for a rapid and viable integrated process for fabricating membrane electrodes assemblies (MEAs). Herein, we report a type of electrocatalyst design for the glucose electro-oxidation reaction (GOR) based on a solid-phase reaction method. In the proposed design, structural defects and a nanoporous framework were integrated in a nanoporous gold (NPG) thin-film electrocatalyst to effectively boost the electrocatalytic behaviors for the GOR in an alkaline solution. The fabricated NPG thin-film catalyst was shown to exhibit a specific activity ca. 1.6 and 25.0 times higher than those of conventional NPG and polycrystalline Au and remarkably higher long-term cyclic stability. Hence, the proposed approach is a promising strategy for the integrated preparation of NPG-based MEAs, which are expected to ultimately promote the commercial applicability of fuel cells.

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mentioning

confidence: 99%

Enhancing the Glucose Oxidation on Nanocrystalline Au Thin-Films by Integrating Nanoporous Framework and Structural Defects

Zhang

Yang

Chen

et al. 2019

J. Electrochem. Soc.

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“…Moreover, TEM is ideal for studying NPG decorated with nanoparticles or thin films [ 23 ]. In addition to elemental data, thinly prepared samples can reveal the dimension of the nanoparticles scattered across the NPG’s surface [ 87 , 149 ]. An example is shown in Figure 15 , which shows NPG decorated with Pt nanoparticles formed after deposition for different lengths of time.…”

Section: Characterizationmentioning

confidence: 99%

Recent Advances in Bimetallic Nanoporous Gold Electrodes for Electrochemical Sensing

Islam,

Banik,

Collinson

2023

Nanomaterials

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Bimetallic nanocomposites and nanoparticles have received tremendous interest recently because they often exhibit better properties than single-component materials. Improved electron transfer rates and the synergistic interactions between individual metals are two of the most beneficial attributes of these materials. In this review, we focus on bimetallic nanoporous gold (NPG) because of its importance in the field of electrochemical sensing coupled with the ease with which it can be made. NPG is a particularly important scaffold because of its unique properties, including biofouling resistance and ease of modification. In this review, several different methods to synthesize NPG, along with varying modification approaches are described. These include the use of ternary alloys, immersion–reduction (chemical, electrochemical, hybrid), co-electrodeposition–annealing, and under-potential deposition coupled with surface-limited redox replacement of NPG with different metal nanoparticles (e.g., Pt, Cu, Pd, Ni, Co, Fe, etc.). The review also describes the importance of fully characterizing these bimetallic nanocomposites and critically analyzing their structure, surface morphology, surface composition, and application in electrochemical sensing of chemical and biochemical species. The authors attempt to highlight the most recent and advanced techniques for designing non-enzymatic bimetallic electrochemical nanosensors. The review opens up a window for readers to obtain detailed knowledge about the formation and structure of bimetallic electrodes and their applications in electrochemical sensing.

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“…With the rapid development of the modern industry, the SO 2 content in the air has gradually increased. It is easy to form acid in a humid environment that corrodes environmental facilities, especially metal products [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the Purity of Gold Leaf in a SO2 Atmosphere at Ambient Temperature

Huang

Liu

2021

Materials

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Gold leaf samples of different purities were corroded in a SO2 atmosphere at three different relative humidities (30%, 60%, 90%) at ambient temperature, and the effects on color, gloss, and morphology were studied. Results showed that a corrosion rate of 0.0898 g/cm2 could be attained after 6 weeks at high humidity. Color changes also occurred during the gold leaf corrosion process, and many thin pits formed on the surfaces, as shown by SEM. EDX results showed that these pits contained C, O, and S compounds. By comparing the results of different gold purity samples and different relative humidity conditions, it could be concluded that both gold content and humidity play an important role in SO2 atmosphere corrosion. These conclusions are helpful for the conservation of gold leaf decorative cultural relics.

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Microstructure and electrocatalytic performance of nanoporous gold foils decorated by TiO2 coatings

Cited by 10 publications

References 38 publications

Enhancing the Glucose Oxidation on Nanocrystalline Au Thin-Films by Integrating Nanoporous Framework and Structural Defects

Enhancing the Glucose Oxidation on Nanocrystalline Au Thin-Films by Integrating Nanoporous Framework and Structural Defects

Recent Advances in Bimetallic Nanoporous Gold Electrodes for Electrochemical Sensing

Study on the Purity of Gold Leaf in a SO2 Atmosphere at Ambient Temperature

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