Development of highly active catalyst for the synthesis of ammonia via electrochemical dinitrogen reduction (e-NRR) is of immense challenge. We report the modification of metallic Ag with inorganic phosphate to...
Electrochemical production of NH3 by Zn-air battery would be a viable and economical approach to realize sustainable and competent energy conversion. We report the environment friendly, cost-effective and energy efficient...
The increasing demand of hydrogen (H2) as
an alternative
clean fuel emboldened the parallel development of extremely sensitive
room-temperature H2 sensors for safety purposes. Molybdenum
disulfide (MoS2) is an intriguing material, exhibiting
a high chemical sensing ability. However, usage of MoS2 in H2 sensors has been limited and usually suffers from
low sensitivity and selectivity, especially at room temperature. In
this work, we report a highly sensitive and selective H2 sensor based on Pt nanoparticle-functionalized vertically aligned
large-area MoS2 flakes. The fabricated Pt@MoS2 sensor exhibits a high sensitivity value of 23%, excellent reproducibility,
fast response, and complete recovery at room temperature. The superior
response of the sensor is attributed to the spillover effect and adsorption
sites distributed on the Pt surface and the MoS2–Pt
interface. The influence of operating temperature on the sensing performance
is also investigated. Density functional theory calculations validate
our experimental results and demonstrate higher adsorption of H2 for Pt@MoS2 leading to improved and selective
H2 response. This study offers Pt nanoparticle-sensitized
MoS2 as a potential candidate for the development of low-power
and room-temperature H2 sensors for near future hydrogen
vehicles and related technologies.
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