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Metal Nanocluster—Metal Organic Framework—Polymer Hybrid Nanomaterials for Improved Hydrogen Detection

Bo Xie, Bosheng Ding, Peng Mao, Ying Wang, Yini Liu, Minrui Chen, Changjiang Zhou, Hui‐min Wen, Shengjie Xia, Min Han, Richard Palmer Orcid Logo, Guanghou Wang, Jun Hu Orcid Logo

Small, Volume: 18, Issue: 23, Start page: 2200634

Swansea University Author: Richard Palmer Orcid Logo

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DOI (Published version): 10.1002/smll.202200634

Abstract

The development of hydrogen sensors is of paramount importance for timely leak detection and remains a crucial unmet need. Palladium-based materials, well known as hydrogen sensors, still suffer from poisoning and deactivation. Here, a hybrid hydrogen sensor consisting of a Pd nanocluster (NC) film,...

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Published in: Small
ISSN: 1613-6810 1613-6829
Published: Wiley 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa60491
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Abstract: The development of hydrogen sensors is of paramount importance for timely leak detection and remains a crucial unmet need. Palladium-based materials, well known as hydrogen sensors, still suffer from poisoning and deactivation. Here, a hybrid hydrogen sensor consisting of a Pd nanocluster (NC) film, a metal–organic framework (MOF), and a polymer, are proposed. The polymer coating, as a protection layer, endows the sensor with excel-lent H2 selectivity and CO-poisoning resistance. The MOF serves as an interface layer between the Pd NC film and the polymer layer, which alters the nature of the interaction with hydrogen and leads to significant sensing performance improvements, owing to the interfacial electronic coupling between Pd NCs and the MOF. The strategy overcomes the shortcomings of retarded response speed and degraded sensitivity induced by the polymer coating of a Pd NC film–polymer hybrid system. This is the first exhibition of a hydrogen-sensing enhancement mechanism achieved by engineering the electronic coupling between Pd and a MOF. The work establishes a deep understanding of the hydrogen-sensing enhancement mechanism at the nanoscale and provides a feasible strategy to engineer next-generation gas-sensing nanodevices with superior sensing figures of merit via hybrid material systems.
Keywords: Hydrogen sensors, interfacial coupling, metal organic frameworks, nanocomposites, palladium
College: College of Engineering
Funders: This work was supported by the National Natural Science Foundation of China under Grant Nos. U1909214, 92061126, 92163110, 11604161, and 51871091.
Issue: 23
Start Page: 2200634