Lightweight, flexible, nanorod electrode with high electrocatalytic activity

Tang, Youqi; Ng, Khee Chaw; Chen, Yi; Cheng, Wenlong

doi:10.1016/j.elecom.2012.11.016

Cited by 12 publications

(14 citation statements)

References 24 publications

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“…Silver paste was from Dupont (Dupont 4929 N, DuPont Corporation, Wilmington, DE, USA). Aqueous CNT solutions (1 mg ml À 1 ) with sodium dodecylbenzenesulphonate (SDBS) (1:10 in quality ratio) as a surfactant were prepared according to the Hu et al 40 Gold nanorods were synthesized in accordance with our previous work 41 ).…”

Section: Methodsmentioning

confidence: 99%

A wearable and highly sensitive pressure sensor with ultrathin gold nanowires

et al. 2014

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Ultrathin gold nanowires are mechanically flexible yet robust, which are novel building blocks with potential applications in future wearable optoelectronic devices. Here we report an efficient, low-cost fabrication strategy to construct a highly sensitive, flexible pressure sensor by sandwiching ultrathin gold nanowire-impregnated tissue paper between two thin polydimethylsiloxane sheets. The entire device fabrication process is scalable, enabling facile large-area integration and patterning for mapping spatial pressure distribution. Our gold nanowires-based pressure sensors can be operated at a battery voltage of 1.5 V with low energy consumption (o30 mW), and are able to detect pressing forces as low as 13 Pa with fast response time (o17 ms), high sensitivity (41.14 kPa À 1 ) and high stability (450,000 loading-unloading cycles). In addition, our sensor can resolve pressing, bending, torsional forces and acoustic vibrations. The superior sensing properties in conjunction with mechanical flexibility and robustness enabled real-time monitoring of blood pulses as well as detection of small vibration forces from music.

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Section: Methodsmentioning

confidence: 99%

A wearable and highly sensitive pressure sensor with ultrathin gold nanowires

et al. 2014

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“…In comparison with other Pd catalysts33 and Pt‐based alloy catalysts,34 the EASA of Pd nanotubes with 150 nm wall thickness is even better. It is also about four times that of gold nanorod electrodes 35…”

Section: Resultsmentioning

confidence: 91%

“…The EASAs of Pd nanotubes with 77, 101, and 150 nm wall thickness are 6.5, 10.6, and 83.2 m 2 g À1 ,r espectively.T he thicker wall probably makes the tube surfacer ougher, and therefore enables them to have ab iggerE ASA. [35] The electrochemical stability of Pd nanotubes for C 2 H 5 OH electrooxidation wasi nvestigated by chronoamperometric experiments at À0.1 Vv ersus SCE in as olution containing C 2 H 5 OH (1.0 m) andK OH (1.0 m) at room temperature (Figure 4b). [35] The electrochemical stability of Pd nanotubes for C 2 H 5 OH electrooxidation wasi nvestigated by chronoamperometric experiments at À0.1 Vv ersus SCE in as olution containing C 2 H 5 OH (1.0 m) andK OH (1.0 m) at room temperature (Figure 4b).…”

Section: Electrocatalytic Performance Of Pd Nanotubesmentioning

confidence: 99%

Palladium Nanotubes Formed by Lipid Tubule Templating and Their Application in Ethanol Electrocatalysis

Wang

et al. 2015

Chemistry A European J

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Palladium nanotubes were fabricated by using lipid tubules as templates for the first time in a controlled manner. The positively charged lipid 1,2-dioleoyl-3-trimethylammoniumpropane (DOTAP) was doped into lipid tubules to adsorb PdCl4 (2-) on the tubule surfaces for further reduction. The lipid tubule formation was optimized by studying the growing dynamics and ethanol/water ratio. The DOTAP-doped tubules showed pH stability from 0 to 14, which makes them ideal templates for metal plating. The Pd nanotubes are open-ended with a tunable wall thickness. They exhibited good electrocatalytic performance in ethanol. Their electrochemically active surface areas were 6.5, 10.6, and 83.2 m(2) g(-1) for Pd nanotubes with 77, 101, and 150 nm wall thickness, respectively. These Pd nanotubes have great potential in fuel cells. The method demonstrated also opens up a way to synthesize hollow metal nanotubes.

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“…The oxidation peak current density for tail‐side exposed electrode is also found to be much higher than head‐side exposed electrode (Figure F), and both of them exhibited a good linear relationship between the oxidation peak current densities and scan rate, indicating that the reactions for C 2 H 5 OH electro‐oxidation on these two kinds of electrodes are surface‐controlled processes . In addition, the ratio of anodic oxidation peak current density to cathodic reduction peak current density ( I pa / I pc ) for both electrodes decreased upon increasing of scan rate (Figure S2, Supporting Information), while the ratio for head‐side exposed electrode is significantly smaller than that of tail‐side exposed electrode, confirming that both two electrodes have good electro‐oxidation abilities, and surface Au oxides contributed mainly to the oxidation of C 2 H 5 OH …”

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confidence: 90%

Intrinsically Stretchable Fuel Cell Based on Enokitake‐Like Standing Gold Nanowires

Zhai

Liu

Wang

et al. 2019

Advanced Energy Materials

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Depending on the scale involved, there are different challenges in contemporary energy research. At the large scale, the main challenge lies in the environmental issues involved in powering cities in a sustainable manner; at the medium scale, the main challenge lies at simultaneously high energy and power density to drive electrical vehicles; at the small scale, the main challenge is how to power wearable and implantable devices anytime and anywhere without the need of external power supply of bulky connecting wires. To realize this latter goal, energy conversion/storage devices need to be ultrathin yet highly functional when being bent, twisted, and stretched. [1][2][3][4][5] However, current energy devices remain bulky and rigid. Despite the development of commercial paper batteries, these devices are not stretchable. [6,7] Therefore, it is highly desirable to develop thinner, softer, more biocompatible, and skin-conformal energy technologies to power future medical devices.It is encouraging to witness recent growing interest in stretchable devices including battery, [8,9] photovoltaics, [10,11] triboelectric generator, [12,13] supercapacitor, [14,15] and fuel cells. [16,17] To date, some biofuel cell based stretchable energy devices have been developed to power wearable electronic devices. [16][17][18][19] Nevertheless, their performance depends largely on the enzyme or bacteria, [16,[19][20][21] and their activity is affected by many factors, including the temperature and pH. [22,23] In contrast, methanol or ethanol based fuel cells have been shown to offer a much higher efficiency and reliability [24] because they are not influenced by external biological environments. To fabricate flexible fuel cells, specially designed electrodes or catalysts are required. In this context, carbon fiber paper or carbon cloth, [25,26] graphene paper, [27] and nickel foam [28] have been successfully utilized to fabricate flexible methanol or ethanol fuel cells. It is possible to design bendable on-chip fuel cells by imprinting Au on cycloolefin polymer films. [29] Ultralong Ag nanowires have been deposited onto polydimethylsiloxane (PDMS) forming percolation network, which can be used as current collectors for bendable fuel cells. [30] Despite the encouraging progress made so far, it remains highly challenging to fabricate stretchable fuel cells, which require new design of the electrodes and electro-catalysts. Conventional fuel cells are based on rigid electrodes, limiting their applications in wearable and implantable electronics.Here, it is demonstrated that enokitake-like vertically-aligned standing gold nanowires (v-AuNWs) can also serve as powerful platform for stretchable fuel cells by using ethanol as model system. Unlike traditional fuel cell electrodes, the v-AuNWs have "Janus Morphology" on both sides of the film and also are highly stretchable. The comparative studies demonstrate that tail side exposed v-AuNWs based stretchable electrodes outperform the head-side exposed v-AuNWs toward the electro-oxidation of eth...

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Lightweight, flexible, nanorod electrode with high electrocatalytic activity

Cited by 12 publications

References 24 publications

A wearable and highly sensitive pressure sensor with ultrathin gold nanowires

A wearable and highly sensitive pressure sensor with ultrathin gold nanowires

Palladium Nanotubes Formed by Lipid Tubule Templating and Their Application in Ethanol Electrocatalysis

Intrinsically Stretchable Fuel Cell Based on Enokitake‐Like Standing Gold Nanowires

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