Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing

Yaprak Özbakir

doi:10.34248/bsengineering.2016186

TR EN

Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing

Abstract

Facet-engineered noble metal nanocrystals coupled with mesoporous oxide supports offer a powerful route toward high-performance hydrogen sensing. In this work, truncated octahedral Pd nanocrystals (TRD-Pd) exposing {111} and {100} facets were synthesized via a halide-assisted facet-selective growth method and integrated with mesoporous tin(IV) oxide (m-SnO2). Structural, morphological, and spectroscopic characterization, including electron microscopy, XRD, FTIR, BET, UV–Vis, and Raman spectroscopy, confirmed the well-defined Pd morphology, good dispersion, and high-surface-area mesoporous framework. Unlike conventional SnO2-based hydrogen sensors, which typically require operating temperatures above 250 °C, the TRD-Pd/m-SnO2 nanocomposite exhibits a pronounced hydrogen response at significantly lower temperatures, achieving peak performance at 150 °C. This low-temperature operation, combined with a ~20-fold enhancement in hydrogen response compared with pristine SnO2, a 14.3 s response time, and a 2.0 ppm detection limit, highlights the catalytic advantage of facet-controlled Pd nanocrystals integrated with mesoporous SnO2. The synergy between engineered Pd facets and the mesoporous semiconductor matrix establishes a promising platform for low-temperature hydrogen detection and provides a potential design strategy for next-generation gas sensors.

Keywords

Ethical Statement

Ethics committee approval was not required for this study because of there was no study on animals or humans.

Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing

Abstract

Facet-engineered noble metal nanocrystals coupled with mesoporous oxide supports offer a powerful route toward high-performance hydrogen sensing. In this work, truncated octahedral Pd nanocrystals (TRD-Pd) exposing {111} and {100} facets were synthesized via a halide-assisted facet-selective growth method and integrated with mesoporous tin(IV) oxide (m-SnO2). Structural, morphological, and spectroscopic characterization, including electron microscopy, XRD, FTIR, BET, UV–Vis, and Raman spectroscopy, confirmed the well-defined Pd morphology, good dispersion, and high-surface-area mesoporous framework. Unlike conventional SnO2-based hydrogen sensors, which typically require operating temperatures above 250 °C, the TRD-Pd/m-SnO2 nanocomposite exhibits a pronounced hydrogen response at significantly lower temperatures, achieving peak performance at 150 °C. This low-temperature operation, combined with a ~20-fold enhancement in hydrogen response compared with pristine SnO2, a 14.3 s response time, and a 2.0 ppm detection limit, highlights the catalytic advantage of facet-controlled Pd nanocrystals integrated with mesoporous SnO2. The synergy between engineered Pd facets and the mesoporous semiconductor matrix establishes a promising platform for low-temperature hydrogen detection and provides a potential design strategy for next-generation gas sensors.

Keywords

Ethical Statement

Ethics committee approval was not required for this study because of there was no study on animals or humans.

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Details

Primary Language

English

Subjects

Inorganic Materials, Physical Properties of Materials, Clean Production Technologies, Materials Science and Technologies

Journal Section

Research Article

Authors

Yaprak Özbakir ^*
0000-0001-6092-641X
United States

Publication Date

November 15, 2026

Submission Date

August 11, 2026

Acceptance Date

October 14, 2026

Published in Issue

Year 2026 Volume: 9 Number: 6

DOI

https://doi.org/10.34248/bsengineering.2016186

IZ

https://izlik.org/JA68ZT54PL

Cite

RIS / Bibtex

APA

Özbakir, Y. (2026). Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing. Black Sea Journal of Engineering and Science, 9(6), 3445-3454. https://doi.org/10.34248/bsengineering.2016186

AMA

1.Özbakir Y. Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing. BSJ Eng. Sci. 2026;9(6):3445-3454. doi:10.34248/bsengineering.2016186

Chicago

Özbakir, Yaprak. 2026. “Facet-Controlled Truncated-Octahedral Pd Nanocrystal Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing”. Black Sea Journal of Engineering and Science 9 (6): 3445-54. https://doi.org/10.34248/bsengineering.2016186.

EndNote

Özbakir Y (November 15, 2026) Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing. Black Sea Journal of Engineering and Science 9 6 3445–3454.

IEEE

[1]Y. Özbakir, “Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing”, BSJ Eng. Sci., vol. 9, no. 6, pp. 3445–3454, Nov. 2026, doi: 10.34248/bsengineering.2016186.

ISNAD

Özbakir, Yaprak. “Facet-Controlled Truncated-Octahedral Pd Nanocrystal Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing”. Black Sea Journal of Engineering and Science 9/6 (November 15, 2026): 3445-3454. https://doi.org/10.34248/bsengineering.2016186.

JAMA

1.Özbakir Y. Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing. BSJ Eng. Sci. 2026;9:3445–3454.

MLA

Özbakir, Yaprak. “Facet-Controlled Truncated-Octahedral Pd Nanocrystal Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing”. Black Sea Journal of Engineering and Science, vol. 9, no. 6, Nov. 2026, pp. 3445-54, doi:10.34248/bsengineering.2016186.

Vancouver

1.Yaprak Özbakir. Facet-Controlled Truncated-Octahedral Pd Nanocrystal/Mesoporous SnO2 Nanocomposites for Low-Temperature, High-Sensitivity Hydrogen Sensing. BSJ Eng. Sci. 2026 Nov. 15;9(6):3445-54. doi:10.34248/bsengineering.2016186