Highly Dispersed Bimetallic Nanoparticles Supported on Titanium Carbides for Remarkable Hydrogen Release from Hydrous Hydrazine

• Published in: ChemCatChem 2018-05, Vol.10 (10), p.2200-2204
• Main Authors: Liu, Tong, Wang, Qingtao, Yuan, Jingzhi, Zhao, Xue, Gao, Guanhui
• Format: Article
• Language: English
• Subjects: Atomic beam spectroscopy; Bimetals; carbides; Catalysis; Catalysts; Chemical synthesis; Decomposition; dehydrogenation; Electrons; heterogeneous catalysis; Hydrazines; Hydrogen storage; Inductively coupled plasma; Nanoparticles; Reaction kinetics; Scanning electron microscopy; Scanning transmission electron microscopy; Spectrum analysis; Synergistic effect; titanium; Titanium carbide; Transmission electron microscopy
• ISSN: 1867-3880; 1867-3899
• DOI: 10.1002/cctc.201701633

The catalytic decomposition of hydrous hydrazine (N2H4⋅H2O) is considered a promising candidate for the fuel‐cell field, but sluggish reaction kinetics dramatically impede its practical application. In this study, bimetallic RhNi nanoparticles were successfully anchored on titanium carbides (MXene) by a one‐step wet‐chemical method to build superior catalysts for the decomposition of hydrous hydrazine (N2H4⋅H2O), a compound that can be used for chemical hydrogen storage. The synthesized RhNi/MXene catalysts were characterized by X‐ray photoelectron spectroscopy, transmission electron microscopy, high‐angle annular dark‐field scanning transmission electron microscopy, and inductively coupled plasma atomic emission spectroscopy. As a result of the particles size and a synergistic effect, the Rh0.8Ni0.2/MXene nanocatalyst demonstrated 100 % selectivity to H2, excellent stability, and high reaction kinetics with a turnover frequency of 857 h−1 for the decomposition of N2H4⋅H2O in alkaline solution. Breaking it down: Bimetallic RhNi nanoparticles are successfully anchored on titanium carbides (MXene) to build superior catalysts for the decomposition of hydrous hydrazine, which can be used for chemical hydrogen storage. Owing to the particles size and a synergistic effect, the Rh0.8Ni0.2/MXene nanocatalyst demonstrates high selectivity, excellent stability, and high reaction kinetics with a turnover frequency of 857 h−1 in alkaline solution.