Palladium/cobalt nanowires with improved hydrogen sensing stability at ultra-low temperatures

Du, Lingling; Feng, Dongliang; Xing, Xiaxia; Yang, Fu; Fonseca, Luis F.; Yang, Dachi

doi:10.1039/c9nr07834g

Cited by 30 publications

(19 citation statements)

References 42 publications

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“…Pd-based hydrogen sensors have been widely investigated because of their safety, room temperature response, and low power consumption . Such sensors can be divided into two main categories: Pd-film, and Pd-nanostructure sensors including those based on Pd nanoparticles, nanowires, and nanocomposites . Pd-film sensors generally exhibit slow response at low concentrations, and can be unreliable at high concentrations due to the volume expansion of PdH x , leading to film deformation .…”

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confidence: 99%

Hydrogen Sensing at Room Temperature Using Flame-Synthesized Palladium-Decorated Crumpled Reduced Graphene Oxide Nanocomposites

et al. 2020

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We present a unique three-dimensional palladium (Pd)-decorated crumpled reduced graphene oxide ball (Pd-CGB) nanocomposite for hydrogen (H 2 ) detection in air at room temperature. Pd-CGB nanocomposites were synthesized using a rapid continuous flame aerosol technique. Graphene oxide reduction and metal decoration occurred simultaneously in a high-temperature reducing jet (HTRJ) process to produce Pd nanoparticles that were below 5 nm in average size and uniformly dispersed in the crumpled graphene structure. The sensors made from these nanocomposites were sensitive over a wide range of H 2 concentrations (0.0025−2%) with response value, response time, and recovery time of 14.8%, 73 s, and 126 s, respectively, at 2% H 2 . Moreover, they were sensitive to H 2 in both dry and humid conditions. The sensors were stable and recoverable after 20 cycles at 2% H 2 with no degradation associated with volume expansion of Pd. Unlike two-step methods for fabricating Pd-decorated graphene sensors, the HTRJ process enables single-step formation of Pd-and other metal-decorated graphene nanocomposites with great potential for creating various gas sensors by simple drop-casting onto low-cost electrodes.

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confidence: 99%

Hydrogen Sensing at Room Temperature Using Flame-Synthesized Palladium-Decorated Crumpled Reduced Graphene Oxide Nanocomposites

et al. 2020

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“…33 The double peak at 69 corresponds to (220) planes reection of CoPd alloy. 34,35 As the next step, the particles were suspended in deionized water. The z-potential measurements on the rodlike particles showed À35.1 AE 7.3 mV (5 measurements), while the average value of z-potential on the microspheres was À45.6 AE 2.7 mV (3 measurements).…”

Section: Resultsmentioning

confidence: 99%

Sensitivity of PS/CoPd Janus particles to an external magnetic field

et al. 2021

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“…Du et al investigated PdCo NW sensors for hydrogen gas sensing over a wide range of temperatures [64]. As shown in Figure 10, the PdCo NW (diameter 60 nm) was fabricated by electrodeposition within an anode aluminium oxide (AAO) nanochannel and further integrated on the test interdigital electrodes (IDE).…”

Section: H → 2hmentioning

confidence: 99%

Recent Advances and Challenges of Nanomaterials-Based Hydrogen Sensors

et al. 2021

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Safety is a crucial issue in hydrogen energy applications due to the unique properties of hydrogen. Accordingly, a suitable hydrogen sensor for leakage detection must have at least high sensitivity and selectivity, rapid response/recovery, low power consumption and stable functionality, which requires further improvements on the available hydrogen sensors. In recent years, the mature development of nanomaterials engineering technologies, which facilitate the synthesis and modification of various materials, has opened up many possibilities for improving hydrogen sensing performance. Current research of hydrogen detection sensors based on both conservational and innovative materials are introduced in this review. This work mainly focuses on three material categories, i.e., transition metals, metal oxide semiconductors, and graphene and its derivatives. Different hydrogen sensing mechanisms, such as resistive, capacitive, optical and surface acoustic wave-based sensors, are also presented, and their sensing performances and influence based on different nanostructures and material combinations are compared and discussed, respectively. This review is concluded with a brief outlook and future development trends.

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Palladium/cobalt nanowires with improved hydrogen sensing stability at ultra-low temperatures

Abstract: The advanced PdCo NW sensors developed for the detection of hydrogen at a wide temperature range showed excellent low-temperature stability.

Cited by 30 publications

References 42 publications

Hydrogen Sensing at Room Temperature Using Flame-Synthesized Palladium-Decorated Crumpled Reduced Graphene Oxide Nanocomposites

Hydrogen Sensing at Room Temperature Using Flame-Synthesized Palladium-Decorated Crumpled Reduced Graphene Oxide Nanocomposites

Sensitivity of PS/CoPd Janus particles to an external magnetic field

Recent Advances and Challenges of Nanomaterials-Based Hydrogen Sensors

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