High H2 sensing performance in hydrogen trititanate-derived TiO2

Kim, Hyun-Su; Moon, Won-Taek; Jun, Youn-Ki; Hong, Sung Je

doi:10.1016/j.snb.2006.01.043

Cited by 28 publications

(11 citation statements)

References 14 publications

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“…Le Bail et al [25] found the coexistence of three phases between 100 and 400 °C, which finally transformed to TiO 2 rutile at 400 °C. H.-S. Kim et al [27] found that at 400 °C only β-TiO 2 existed in the sample, at 600 °C the presence of TiO 2 anatase was observed, while rutile began to appear at 800 °C. S. Papp et al [32] observed the collapse of the layered structure of H 2 Ti 3 O 7 after heating the sample to temperatures between 250 and 700 °C, while above 700 °C a phase transformation to a mixture of anatase and rutile TiO 2 was observed.…”

Section: Introductionmentioning

confidence: 97%

“…Hydrogen trititanate in the form of crystalline powder with a ramsdellite-type structure [25] can be synthesized from layered crystalline Na 2 Ti 3 O 7 by the ion exchange of the interlayer sodium cations with H 3 O + ions [24]. Because of the high proton conductivity of H 2 Ti 3 O 7 , this material has been studied as a potential solid-oxide electrolyte for fuel cells [26] and as sensing material in hydrogen sensors [27].…”

Section: Introductionmentioning

confidence: 99%

“…The influence of temperature on the structure and phase transitions of titanate nanotubes [11,[27][28][29][30][31] and crystalline hydrogen trititanate [25, 27, and 32] is well understood. The thermal behavior of crystalline H 2 Ti 3 O 7 has been studied by A.…”

Section: Introductionmentioning

confidence: 99%

“…The thermal behavior of crystalline H 2 Ti 3 O 7 has been studied by A. Le Bail et al, H.-S. Kim et al, and S. Papp et al [25,27,32]. A.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The mechanochemical stability of hydrogen titanate nanostructures

Plodinec¹,

Friščić²,

Iveković³

et al. 2010

Journal of Alloys and Compounds

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The structural stability of some nanostructured titanates was investigated in terms of their subsequent processing and possible applications. With the aim to investigate their mechanochemical stability, we applied high-energy ball milling and studied the resulting induced phase transitions. Hydrogen titanates with two different morphologies, microcrystals and nanotubes, were taken into consideration. The phase-transition sequence was studied by Raman spectroscopy and X-ray powder diffraction, while the morphology and crystal structure, on the nanoscale, were analyzed by high-resolution transmission electron microscopy. During the mechanochemical treatment of both morphologies, the phase transitions from hydrogen titanate to TiO2 anatase and subsequently to TiO2 rutile were observed. In the case of hydrogen trititanate crystals, the phase transition to anatase starts after a longer milling time than in the case of the titanate nanotubes, which is explained by the larger particle size of the crystalline powder. However, the phase transition from anatase to rutile occurred more quickly in the crystalline powder than in the case of the nanotubes.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The thermal behavior of crystalline H 2 Ti 3 O 7 has been studied by A. Le Bail et al, H.-S. Kim et al, and S. Papp et al [25,27,32]. A.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The mechanochemical stability of hydrogen titanate nanostructures

Plodinec¹,

Friščić²,

Iveković³

et al. 2010

Journal of Alloys and Compounds

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show abstract

“…When the sensor is exposed to a reducing gas such as hydrogen, the hydrogen reacts with the absorbed oxygen species to form water and the electron is re-injected into the semiconductor to reduce the resistance. Several metal-oxide semiconductors have been used as gas-sensing materials such as tin oxide (SnO 2 ) (Korotcenko et al, 2001), tungsten trioxide (WO 3 ) (Kim et al, 2006), titanium oxide (TiO 2 ) (Smith et al, 1993) and zinc oxide (ZnO) (Tomchenko et al, 2003). In order to accelerate the reaction rate and increase the sensitivity, a catalyst Pd or Pt is usually deposited on the surface of the oxide semiconductor.…”

Section: Semiconductor Sensormentioning

confidence: 99%

A Study on Hydrogen Reaction Kinetics of Pt/HfO2/SiC Schottky-Diode Hydrogen Sensors

Tang¹,

Leung²,

Lai³

2012

Stoichiometry and Materials Science - When Numbers Matter

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Engineering Electronic Structures of Nickel Cobalt Phosphide via Iron Doping for Efficient Overall Water Splitting

et al. 2020

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Efficient and low‐cost bifunctional OER/HER electrocatalysts are important for overall water splitting. Herein, three‐dimensional self‐supported Fe‐doped NiCo‐based phosphide nanosheets arrays are in‐situ grown on carbon fiber paper. The catalyst shows superior bifunctional activity, with an OER overpotential of 230 mV and an HER overpotential of 95 mV at 10 mA cm−2 in alkaline electrolyte. It is evidenced that the Fe doping facilitates electron transfer from Co/Ni to P, thus optimizing the electronic structures of both Ni and Co active sites, in turn greatly enhancing intrinsic OER and HER activities. The OER and HER turnover frequency are largely improved after Fe doping. When used as both anode and cathode for water splitting, the catalyst enables the electrolyzer to achieve 10 mV cm−2 at a low cell voltage of 1.59 V with a long‐term stability up to 35 h. This work highlights the synergy effect of multi‐metal‐based phosphides for efficient water electrocatalysis.

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High H2 sensing performance in hydrogen trititanate-derived TiO2

Cited by 28 publications

References 14 publications

The mechanochemical stability of hydrogen titanate nanostructures

The mechanochemical stability of hydrogen titanate nanostructures

A Study on Hydrogen Reaction Kinetics of Pt/HfO2/SiC Schottky-Diode Hydrogen Sensors

Engineering Electronic Structures of Nickel Cobalt Phosphide via Iron Doping for Efficient Overall Water Splitting

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