Improved H2 detection performance of GaN sensor with Pt/Sulfide treatment of porous active layer prepared by metal electroless etching

Muhammad Shafa; S. Assa Aravindh; Mohamed N. Hedhili; Saleh T. Mahmoud; Yi Pan; Tien Khee Ng; Boon S. Ooi; Adel Najar

doi:10.1016/j.ijhydene.2020.10.275

Improved H₂ detection performance of GaN sensor with Pt/Sulfide treatment of porous active layer prepared by metal electroless etching

Muhammad Shafa, S. Assa Aravindh, Mohamed N. Hedhili, Saleh T. Mahmoud, Yi Pan, Tien Khee Ng, Boon S. Ooi, Adel Najar

Department of Physics

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

High-performance chemiresistor gas sensor made of sulfide porous GaN decorated with Pt nanoparticles, which shows tunable sensor response and enhanced sensitivity. The fabricated gas sensors show detection of H₂ down to 30 ppm at 23 °C after sulfide treatment and Pt decorated porous GaN. The response time and recovery time were equal to 47 s and 113 s, respectively. Density functional theory simulations were used to support the detection mechanism based on sulfide treatment. Adsorption energy calculations showed that H adsorption energy is lowered by the simultaneous presence of S and Pt on the GaN (0001) surface. The density of states (DOS) calculations revealed possibility of bond strengthening when Pt and S is adsorbed on GaN surface along with H, arising from the hybridization of d and p orbitals of Pt and S with that of H 1s orbitals.

Original language	English
Pages (from-to)	4614-4625
Number of pages	12
Journal	International Journal of Hydrogen Energy
Volume	46
Issue number	5
DOIs	https://doi.org/10.1016/j.ijhydene.2020.10.275
Publication status	Published - Jan 19 2021

Keywords

DFT
H sensor
High sensitivity
Porous GaN
Surface functionalization

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

Access to Document

10.1016/j.ijhydene.2020.10.275

Cite this

@article{e5c43a3472a54e7794297b6370f6bebc,

title = "Improved H2 detection performance of GaN sensor with Pt/Sulfide treatment of porous active layer prepared by metal electroless etching",

abstract = "High-performance chemiresistor gas sensor made of sulfide porous GaN decorated with Pt nanoparticles, which shows tunable sensor response and enhanced sensitivity. The fabricated gas sensors show detection of H2 down to 30 ppm at 23 °C after sulfide treatment and Pt decorated porous GaN. The response time and recovery time were equal to 47 s and 113 s, respectively. Density functional theory simulations were used to support the detection mechanism based on sulfide treatment. Adsorption energy calculations showed that H adsorption energy is lowered by the simultaneous presence of S and Pt on the GaN (0001) surface. The density of states (DOS) calculations revealed possibility of bond strengthening when Pt and S is adsorbed on GaN surface along with H, arising from the hybridization of d and p orbitals of Pt and S with that of H 1s orbitals.",

keywords = "DFT, H sensor, High sensitivity, Porous GaN, Surface functionalization",

author = "Muhammad Shafa and Aravindh, {S. Assa} and Hedhili, {Mohamed N.} and Mahmoud, {Saleh T.} and Yi Pan and Ng, {Tien Khee} and Ooi, {Boon S.} and Adel Najar",

note = "Publisher Copyright: {\textcopyright} 2020 Hydrogen Energy Publications LLC",

year = "2021",

month = jan,

day = "19",

doi = "10.1016/j.ijhydene.2020.10.275",

language = "English",

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journal = "International Journal of Hydrogen Energy",

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T1 - Improved H2 detection performance of GaN sensor with Pt/Sulfide treatment of porous active layer prepared by metal electroless etching

AU - Shafa, Muhammad

AU - Aravindh, S. Assa

AU - Hedhili, Mohamed N.

AU - Mahmoud, Saleh T.

AU - Pan, Yi

AU - Ng, Tien Khee

AU - Ooi, Boon S.

AU - Najar, Adel

PY - 2021/1/19

Y1 - 2021/1/19

N2 - High-performance chemiresistor gas sensor made of sulfide porous GaN decorated with Pt nanoparticles, which shows tunable sensor response and enhanced sensitivity. The fabricated gas sensors show detection of H2 down to 30 ppm at 23 °C after sulfide treatment and Pt decorated porous GaN. The response time and recovery time were equal to 47 s and 113 s, respectively. Density functional theory simulations were used to support the detection mechanism based on sulfide treatment. Adsorption energy calculations showed that H adsorption energy is lowered by the simultaneous presence of S and Pt on the GaN (0001) surface. The density of states (DOS) calculations revealed possibility of bond strengthening when Pt and S is adsorbed on GaN surface along with H, arising from the hybridization of d and p orbitals of Pt and S with that of H 1s orbitals.

AB - High-performance chemiresistor gas sensor made of sulfide porous GaN decorated with Pt nanoparticles, which shows tunable sensor response and enhanced sensitivity. The fabricated gas sensors show detection of H2 down to 30 ppm at 23 °C after sulfide treatment and Pt decorated porous GaN. The response time and recovery time were equal to 47 s and 113 s, respectively. Density functional theory simulations were used to support the detection mechanism based on sulfide treatment. Adsorption energy calculations showed that H adsorption energy is lowered by the simultaneous presence of S and Pt on the GaN (0001) surface. The density of states (DOS) calculations revealed possibility of bond strengthening when Pt and S is adsorbed on GaN surface along with H, arising from the hybridization of d and p orbitals of Pt and S with that of H 1s orbitals.

KW - DFT

KW - H sensor

KW - High sensitivity

KW - Porous GaN

KW - Surface functionalization

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JF - International Journal of Hydrogen Energy

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