Ade Utami Hapsari, Damisih, Retna Deca Pravitasari, Yelvia Deni, Annisa Raihana Aziza, Muhammad Irfansyah Maulana, Dea Bella Dewary Atika Putri, Bambang Triwibowo, Nanik Indayaningsih, Deni Shidqi Khaerudini, Khuzaimah Arifin, Jarot Raharjo
Hydrogen is increasingly recognized as a promising alternative energy source due to its ability to reduce fossil fuel dependence and mitigate global climate change. As a clean energy carrier, it offers a sustainable pathway to low-carbon systems, supporting the decarbonization of transportation, industry, and power generation. Its versatility and abundance further highlight its potential as a key component in the transition to a greener energy future. Developing efficient hydrogen storage materials is critical for advancing hydrogen energy applications. This study explores the synthesis of La–Ni-based materials using the combustion–CO reduction method to enhance hydrogen sorption properties. The LaNi5 phase, a prominent hydrogen sorption material, was synthesized through combustion-gel synthesis followed by CO reduction at 500°C, 600°C, and 700°C. Comprehensive characterization was performed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), particle size analysis (PSA), and chemisorption (TPD-H2) to examine phase formation, particle size, surface properties, and catalytic activity. The findings reveal that the combustion-gel synthesis-CO reduction method improves the hydrogen storage performance of La–Ni-based materials while providing a scalable production approach. The material reduced at 500°C for 5 hours exhibited the highest hydrogen desorption properties, achieving an H2 uptake of 0.0396 mmol/g, alongside the smallest particle size among the samples. These results underscore the significance of reduction temperature, particle size, and phase formation in determining hydrogen storage performance. This work highlights the potential of tailored La–Ni-based materials for advanced hydrogen sorption applications, paving the way for more efficient energy systems. © 2026 American Institute of Physics Inc.. All rights reserved.
Research Center for Advanced Materials, National Research and Innovation Agency (BRIN), 224 Building, Area Science and Technology, B.J. Habibie, South Tangerang, 15314, Indonesia; Department of Physics, Brawijaya University, Malang, Indonesia; Department of Chemistry, Universitas Pendidikan Indonesia (UPI), Bandung, Indonesia; Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
