Platinum nanoparticles on electrospun titania nanofibers as hydrogen sensing materials working at room temperature

Nanoscale ◽  
2014 ◽  
Vol 6 (15) ◽  
pp. 9177-9184 ◽  
Author(s):  
Ilaria Fratoddi ◽  
Antonella Macagnano ◽  
Chiara Battocchio ◽  
Emiliano Zampetti ◽  
Iole Venditti ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Room Temperature ◽  
High Response ◽  
Hydrogen Sensing ◽  
Titania Nanofibers

Pt–TiO2 were prepared as hydrogen sensing materials showing (at room temperature, under UV) enhancement of photoconductivity and high response.

scholarly journals Grain-boundary-rich Pt nanoparticle assembly for catalytic hydrogen sensing at room temperature

2021 ◽  
Author(s):  
LONG LUO ◽  
Xin Geng ◽  
Shuwei Li ◽  
Jaeyoung Heo ◽  
Yi Peng ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Platinum Nanoparticles ◽  
High Performance ◽  
Room Temperature ◽  
Hydrogen Oxidation ◽  
Water Electrolysis ◽  
Nanoparticle Assembly ◽  
Platinum Nanoparticle ◽  
Hydrogen Sensing ◽  
Catalytic Hydrogen

We report a facile method of synthesizing grain-boundary(GB)-rich platinum nanoparticle assembly. GBs are formed between platinum nanoparticles during their random collision and attachment in solution driven by water electrolysis. The GB-rich nanoparticle assembly exhibits ~400-fold higher catalytic hydrogen oxidation rate than platinum nanoparticles before assembly, enabling catalytic hydrogen sensing at room temperature without external heating. Our sensor also demonstrates fast response/recovery (~7 s at >1% H2), nearly no signal variation during a 280-hour-long stability test, and high selectivity toward hydrogen over 36 interference gases. Furthermore, this sensor can be easily fabricated from commercial thermometers at a low cost (< $5 per unit). Theoretical calculation results reveal that the high performance of GB-rich platinum nanoparticle assembly arises from tensile strain at the GBs.

Pd Nanocluster/Monolayer MoS2 Heterojunctions for Light-Induced Room-Temperature Hydrogen Sensing

2021 ◽  
Author(s):  
Hien Duy Mai ◽  
Sangmin Jeong ◽  
Tri Khoa Nguyen ◽  
Jong-Sang Youn ◽  
Seungbae Ahn ◽  
...  
Keyword(s):  
Room Temperature ◽  
Monolayer Mos2 ◽  
Hydrogen Sensing

scholarly journals Transforming Pt-SnO2 Nanoparticles into Pt-SnO2 Composite Nanoceramics for Room-Temperature Hydrogen-Sensing Applications

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2123
Author(s):  
Ming Liu ◽  
Caochuang Wang ◽  
Pengcheng Li ◽  
Liang Cheng ◽  
Yongming Hu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Sintering Temperature ◽  
Sno2 Nanoparticles ◽  
Hydrogen Sensing ◽  
Sensing Applications ◽  
Nanostructured Metal Oxides ◽  
Low Dimensional ◽  
Sensing Characteristics ◽  
Nanostructured Metal

Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO2 nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO2 grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO2 at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.

Room-temperature hydrogen sensing properties of SnO2-coated multi-walled carbon nanotubes

Carbon ◽  
2010 ◽  
Vol 48 (13) ◽  
pp. 3976
Author(s):  
Xue Sun ◽  
Hai-Tao Fang ◽  
Hui-Long Yu ◽  
Yi Chu ◽  
Bao-You Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Room Temperature ◽  
Sensing Properties ◽  
Hydrogen Sensing ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Room Temperature Reduction of Graphene Oxide by Formic Acid Catalyzed by Platinum Nanoparticles

2013 ◽  
Vol 13 (4) ◽  
pp. 2967-2973 ◽  
Author(s):  
Yinjie Wang ◽  
Jincheng Liu ◽  
Lei Liu ◽  
Tong Zhang ◽  
Darren D. Sun
Keyword(s):  
Graphene Oxide ◽  
Formic Acid ◽  
Platinum Nanoparticles ◽  
Room Temperature ◽  
Temperature Reduction ◽  
Acid Catalyzed

High-Response Room-Temperature NO2 Sensor and Ultrafast Humidity Sensor Based on SnO2 with Rich Oxygen Vacancy

2019 ◽  
Vol 11 (14) ◽  
pp. 13441-13449 ◽  
Author(s):  
Yujia Zhong ◽  
WeiWei Li ◽  
Xuanliang Zhao ◽  
Xin Jiang ◽  
Shuyuan Lin ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Room Temperature ◽  
Humidity Sensor ◽  
High Response ◽  
No2 Sensor

Fabrication of ZnO Nanowall-Based Hydrogen Gas Nanosensor

2013 ◽  
Vol 684 ◽  
pp. 21-25 ◽  
Author(s):  
Tse Pu Chen ◽  
Sheng Po Chang ◽  
Shoou Jinn Chang
Keyword(s):  
Seed Layer ◽  
Room Temperature ◽  
Thermal Evaporation ◽  
Hydrogen Gas ◽  
Two Dimensional ◽  
Defect Related Emission ◽  
Room Temperature Photoluminescence ◽  
Hydrogen Sensing ◽  
Uv Emission ◽  
Sensing Characteristics

Two-dimensional ZnO nanowalls were rapidly grown on glass substrate by thermal evaporation at low temperature without any catalysts or the pre-deposition of a ZnO seed layer on the substrate. Most of the ZnO nanowalls grown at 450°C were vertical on substrate and they were about 70-200 nm thick and 2 µm long. The room-temperature photoluminescence (PL) spectra showed a strong intrinsic ultraviolet (UV) emission and a weak defect-related emission. Hydrogen-sensing characteristics of the ZnO nanowalls have been investigated, and that make them become attractive candidates for gas sensor.

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