Palladium nanoparticle-decorated multi-layer TiCT dual-functioning as a highly sensitive hydrogen gas sensor and hydrogen storage

In this work, palladium nanoparticle (PdNP)-decorated Ti 3 C 2 T x MXene (Pd-Ti 3 C 2 T x ) was synthesized by a simple two-step process. For this, multilayer Ti 3 C 2 T x MXene (ML-Ti 3 C 2 T x ) was first prepared by a selective HF etching technique, and PdNPs were directly grown on the surface of...

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Published in:RSC advances 2021-02, Vol.11 (13), p.7492-751
Main Authors: Phuong Doan, Thanh Hoang, Hong, Won G, Noh, Jin-Seo
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Summary:In this work, palladium nanoparticle (PdNP)-decorated Ti 3 C 2 T x MXene (Pd-Ti 3 C 2 T x ) was synthesized by a simple two-step process. For this, multilayer Ti 3 C 2 T x MXene (ML-Ti 3 C 2 T x ) was first prepared by a selective HF etching technique, and PdNPs were directly grown on the surface of ML-Ti 3 C 2 T x flakes using a polyol method. The relative weight fraction of PdNPs to ML-Ti 3 C 2 T x was elaborately controlled to derive the optimal size and distribution of PdNPs, thereby to maximize its performance as a hydrogen sensor. The optimized Pd-Ti 3 C 2 T x nanocomposite showed superb hydrogen-sensing capability even at room temperature with sharp, large, reproducible, concentration-dependent, and hydrogen-selective responses. Furthermore, the nanocomposite also unveiled some extent of hydrogen storage capability at room temperature and 77 K, raising a possibility that it can dual-function as a hydrogen sensor and hydrogen storage. Nanocomposites of PdNPs and ML-Ti 3 C 2 T x MXene are synthesized using a facile two-step process, and it is demonstrated that they can dual-function as a highly sensitive hydrogen sensor and hydrogen storage.
ISSN:2046-2069
DOI:10.1039/d0ra10879k