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All Journal Indonesian Journal of Chemistry Indonesian Physical Review
Nurfitrah, Aditya Eka
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education Physics

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Temperature-Programmed Desorption of H2 from Mg-Ni/C for Hydrogen Storage Application Rudypratama, Billy; Nurfitrah, Aditya Eka; Ismoyojati, Rizki; Priyono, Bambang
Indonesian Journal of Chemistry Vol 25, No 5 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.104644

Abstract

Hydrogen is a flexible energy carrier with the potential to replace fossil fuels as a clean and renewable energy source. However, efficient storage systems under ambient conditions are essential for practical applications. This study investigates magnesium–nickel-based metal hydrides for hydrogen storage, enhanced with 20% graphite or additional nickel. The synthesized samples—MgNi2, MgNi2 + graphite 20%, Mg2Ni + graphite 20%, and Mg2Ni + Ni 1:1—were characterized using XRD, BET, SEM-EDX, and hydrogen temperature-programmed desorption (TPD). Crystallite sizes were found to be 132.125, 137.125, 77.168, and 92.335 nm, respectively. BET analysis revealed surface areas of 2.144, 1.664, 7.113, and 2.308 m2/g, corresponding pore volumes of 0.0038, 0.0031, 0.0137, and 0.0100 cm3/g. TPD results showed that Mg2Ni + graphite 20% had the fastest desorption rate (46 min), consistent with its highest surface area and pore volume. This sample also achieved the highest hydrogen adsorption capacity at 0.0615 mmol/g. These findings demonstrate that Mg-Ni hydrides, especially those modified with graphite, offer promising performance for hydrogen storage applications, particularly in systems requiring rapid desorption and efficient kinetics, such as fuel-cell electric vehicles. The results highlight the potential of tailored Mg-Ni composites for advanced hydrogen storage solutions.
DESIGN AND SELECTION OF PADDLE MATERIALS FOR HIGH-LEVEL ROWING COMPETITION APPLICATIONS USING MULTI-CRITERIA DECISION ANALYSIS Nurfitrah, Aditya Eka; Riva Nanda, Iksan; Syahrial, Anne Zulfia
Indonesian Physical Review Vol. 8 No. 1 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i1.355

Abstract

The study evaluated a variety of material alternatives including wood, bamboo, carbon fiber reinforced polymer (CFRP), and ceramics for use in high-performance paddleboard. The selection process considers factors such as strength, density, cost, and durability with a focus on the most relevant material criteria for the product. The weighted addition method is used to evaluate and rank several alternative materials that have been selected based on these criteria. Wood and bamboo are chosen for their sustainability, CFRP for their superior strength-to-weight ratio, and ceramics for their resistance to extreme conditions. The study found that CFRP had the highest score of around 85.40 due to its superior strength and lightweight. The framework proposed in this study could provide tools for rowing teams to optimize paddle materials so that they offer the potential for increased speed and performance in the competition.  
Co-Authors Anne Zulfia Bambang Priyono Ismoyojati, Rizki Riva Nanda, Iksan Rudypratama, Billy