Optimizing Hydrogen Storage Pathways in Ti-Al Alloys through Controlled Oxygen Addition Vivek Shukla, Sung Ju Han, Taejun Ha, Satya Prakash Padhee, Jin-Yoo Suh, et al. International Journal of Energy Research, 2024 In the present study, we aimed to destabilize the Ti–Al system with nonmetallic oxygen. The synthesis of α‐(Ti, Al)[O] starting from TiO2, Ti, and Al was carried out through the arc melting method, resulting in three different oxygen content levels, 3.4, 10, and 20 at%. The room temperature activation of α‐(Ti, Al)[O] was not successful, and the activation was performed at 300°C under 5 MPa H2 pressure. The structural changes after hydrogenation (maximum absorption capacity of 3.74 wt% hydrogen) arose from the transformation of α‐(Ti, Al)[O] to cubic (Ti, Al)[O]Hx (c‐(Ti, Al)[O]Hx); nonetheless, they recovered their original lattice parameters, which are meaningfully larger than those of α‐Ti, after dehydrogenation. The hydrogen storage capacities for various α‐(Ti, Al)[O] compositions generally decreased with increasing oxygen (3.4 and 10 at%) and aluminum content in the alloy. In contrast, for the compositions with a higher oxygen content of 20 at%, the hydrogen storage capacity slightly increased as the Al concentration increased: Ti0.790Al0.010O0.200 absorbed 2.91 wt% hydrogen, whereas Ti0.767Al0.033O0.200 absorbed 3.04 wt% hydrogen. The thermogravimetric analysis showed that samples with 20 at% O released hydrogen at lower temperatures even though the major phase after hydrogenation is c‐(Ti, Al)[O]Hx regardless of the oxygen content.
Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates Uttam K. Chanda, Satya Prakash Padhee, Anil D. Pathak, Sudesna Roy, Soobhankar Pati Materials for Renewable and Sustainable Energy, 2019 In here, we report on the pulse electrodeposition of nickel–chromium–phosphorous (Ni–Cr–P) coatings on AISI 1020 low carbon steel using an aqueous electrolyte consisting of NiCl2, CrCl3, and NaH2PO2. We evaluated the effectiveness of Ni–Cr–P coatings for polymer electrolyte membrane fuel cell metallic bipolar plates. Coatings deposited at pH 3.0 and room temperature show nearly three orders improvement in corrosion resistance compared to bare AISI 1020. The corrosion current (Icorr) of Ni–Cr–P samples coated at 25 °C is 1.16 × 10−4A/cm2, while that of bare carbon steel is 1.05 × 10−2A/cm2. The improvement in corrosion resistance is due to the increase in Cr content in the Ni–Cr–P coatings. Cr forms a stable oxide barrier layer and inhibits pitting corrosion. The interfacial contact resistance increases with an increase in Cr content and immersion time in the corrosion media. The increase in interfacial contact resistance is also due to the formation of a stable oxide barrier.
RECENT SCHOLAR PUBLICATIONS
Optimizing hydrogen storage in TiFe–V alloys: influence of sample purity and heat treatment SP Padhee, K Sakaki, V Shukla, K Hwang, YW Cho, YS Lee International Journal of Hydrogen Energy 138, 874-883 , 2025 2025 Citations: 10
Optimizing hydrogen storage pathways in Ti–Al alloys through controlled oxygen addition V Shukla, SJ Han, T Ha, SP Padhee, JY Suh, YW Cho, YS Lee International Journal of Energy Research 2024 (1), 2216181 , 2024 2024 Citations: 2
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MOST CITED SCHOLAR PUBLICATIONS
Electrodeposited Ni–Mo–Cr–P coatings for AISI 1020 steel bipolar plates UK Chanda, SP Padhee, AK Pandey, S Roy, S Pati international journal of hydrogen energy 45 (41), 21892-21904 , 2020 2020 Citations: 33
Role of Mn-substitution towards the enhanced hydrogen storage performance in FeTi SP Padhee, A Roy, S Pati International Journal of Hydrogen Energy 47 (15), 9357-9371 , 2022 2022 Citations: 27
Mechanistic insights into efficient reversible hydrogen storage in ferrotitanium SP Padhee, A Roy, S Pati International Journal of Hydrogen Energy 46 (1), 906-921 , 2021 2021 Citations: 27
Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates UK Chanda, SP Padhee, AD Pathak, S Roy, S Pati Materials for Renewable and Sustainable Energy 8 (4), 1-11 , 2019 2019 Citations: 16
Optimizing hydrogen storage in TiFe–V alloys: influence of sample purity and heat treatment SP Padhee, K Sakaki, V Shukla, K Hwang, YW Cho, YS Lee International Journal of Hydrogen Energy 138, 874-883 , 2025 2025 Citations: 10
Electro-deoxidation process for producing FeTi from low-grade ilmenite: tailoring precursor composition for hydrogen storage SP Padhee, UK Chanda, R Singh, A Roy, B Mishra, S Pati Journal of Sustainable Metallurgy 7 (3), 1178-1189 , 2021 2021 Citations: 6
Optimizing hydrogen storage pathways in Ti–Al alloys through controlled oxygen addition V Shukla, SJ Han, T Ha, SP Padhee, JY Suh, YW Cho, YS Lee International Journal of Energy Research 2024 (1), 2216181 , 2024 2024 Citations: 2