Silica supported ternary NiRuPt alloy nanoparticles: Highly efficient heterogeneous catalyst for H 2 generation via selective decomposition of hydrous hydrazine in alkaline solution Yasar Karatas, Mehmet Gu ¨ lcan * , Mehmet Zahmakiran Department of Chemistry, Faculty of Science, Van Yu ¨zu ¨ ncu ¨ Yıl University, 65080, Van, Turkey highlights graphical abstract  SiO 2 supported NiPtRu NPs (NiP- tRu/SiO 2 ) were successfully prepared.  NiPtRu/SiO 2 catalyst were charac- terized by P-XRD, XPS, BFTEM and TEM-line analysis.  Catalytic performance of the cata- lyst was tested in the decomposi- tion of HH.  The catalytic activity of NiPtRu/ SiO 2 is 324.1 min. 1 for HH decomposition.  And the total turnover number of NiPtRu/SiO 2 is 4181 for HH decomposition. article info Article history: Received 16 April 2020 Received in revised form 3 July 2020 Accepted 6 July 2020 Available online 2 August 2020 Keywords: Hydrazine Hydrogen Nickel abstract Hydrous hydrazine (H 2 NNH 2 .H 2 O, HH) is taken notice to be one of the promising hydrogen storage materials for the future due to its high hydrogen content of 7.9% wt. In this study, we develop a new catalytic material formed from trimetallic NiRuPt alloy nanoparticles decorated on silica support (NiRuPt/SiO 2 ) for the hydrogen production via selective decomposition of HH under mild reaction conditions. NiRuPt/SiO 2 catalyst was prepared by wet-impregnation technique in water at room conditions and characterized by the various spectroscopic/analytical tools. The sum of their results is revealing that the formation ternary NiRuPt alloy (d mean ¼ 6.4 nm) nanoparticles on the surface of SiO 2 . The prepared new catalytic system eases the selective hydrogen production from decomposition of HH in aqueous alkaline solution with high activity (324.1 min 1 ) and conversion (>99%) at 333 K. Furthermore, painless recovery plus high durability of these supported NiRuPt nano- particles against to agglomeration and leaching make them recyclable catalyst so that they * Corresponding author. E-mail address: mehmetgulcan65@gmail.com (M. Gu ¨ lcan). URL: https://avesis.yyu.edu.tr/mehmetgulcan Available online at www.sciencedirect.com ScienceDirect journal homepage: www.elsevier.com/locate/he international journal of hydrogen energy 45 (2020) 27098 e27113 https://doi.org/10.1016/j.ijhydene.2020.07.048 0360-3199/© 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.