Integrated co-axial electrospinning for a single-step production of 1D aligned bimetallic carbon fibers@AuNPs–PtNPs/NiNPs–PtNPs towards H2 detection

Keerthi G Nair,Ramakrishnan Vishnuraj,Biji Pullithadathil

doi:10.1039/d1ma00683e

Keerthi G Nair, Ramakrishnan Vishnuraj + Show 1 more

Open Access

https://doi.org/10.1039/d1ma00683e

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Journal: Materials advances	Publication Date: Jan 1, 2022
Citations: 3	License type: CC BY 3.0

Affiliation: PSG Institute of Advanced Studies

Abstract

Aligned 1D heterojunction carbon nanofibers have been developed, which possess exceptional properties like high surface-to-volume ratio and excellent direct electron transport properties favouring their hydrogen sensing properties.

Highlights

Hydrogen is considered as the future clean energy fuel and is widely used in numerous industries, such as, petrochemical refinery, coolant, chemical synthesis, semiconductors, fuel cells, aerospace, automobile and as energy carrier in nuclear fusion power plant.[1,2] Over the last decade, there have been growing research interests in the use of hydrogen as a zero-emission fuel in automotive applications
To summarize, direct single-step fabrication strategy for the synthesis of 1D aligned electrospun co-axial Carbon nanofibers (CFs)@PtNPs, co-axial CFs@AuNPs-PtNPs and co-axial CFs@NiNPs-PtNPs were demonstrated towards H2 gas sensing at RT
Broad detection of H2 (0.1% to 4%) using aligned co-axial CFs@Ni NPs-Pt NPs showed superior H2 gas sensing performance (124%) compared to CFs@PtNPs (52%) and CFs@AuNPs-PtNPs (65.4%) at room temperature which may be due to the superior catalytic property of both Ni and Pt

Summary

Introduction

Hydrogen is considered as the future clean energy fuel and is widely used in numerous industries, such as, petrochemical refinery, coolant, chemical synthesis, semiconductors, fuel cells, aerospace, automobile and as energy carrier in nuclear fusion power plant.[1,2] Over the last decade, there have been growing research interests in the use of hydrogen as a zero-emission fuel in automotive applications. Semiconductor based H2 sensors needs high working temperature of 150 C-400 C to accomplish high sensitivity and possess poor selectivity towards H2 gas.[5] Recently, gas sensors based on 1D carbon materials, such as carbon nanofibers(CFs)[6] and carbon nanotubes (CNTs)[7], have achieved considerable importance as ideal candidates for carbon nanostructures based sensors towards room temperature detection of H2 owing to their high surface to volume ratio and directed charge transport properties Such carbon nanostructures can be functionalized with noble metals or bimetals, leading to improved gas sensor performance.[8] only few reports are available on carbon nanofibers based gas sensors compared to CNT based gas sensors. This study might furnish significantly about the selection of advanced sensor materials for room temperature H2 gas sensor device with enhanced sensor performance and process conditions with improved selectivity which favour mass production of H2 sensors with reduction in overall cost

Materials

Results and discussion

Conclusions