@article {49885,
	title = {Energy-saving H2 production through H2S electrolysis accompanying solid sulfur recovery using a Ni3S2/Ni3N heterostructure as the electrocatalyst},
	journal = {ACS Applied Energy Materials},
	volume = {8},
	year = {2025},
	month = {SEP },
	pages = {13631-13644},
	type = {Article},
	abstract = {<p>
	The thermodynamically feasible electrochemical sulfion oxidation reaction (SOR) is advantageous for degrading the toxic H2S pollutant into the value-added chemical sulfur but often suffers from catalyst passivation due to blockage of electroactive sites by accumulation of solid sulfur. The strategic design of electrocatalysts with enhanced electrochemical activity and improved sulfur tolerance is thereby crucial to fully harness the benefits of the SOR. In this work, we developed nickel sulfide nanorods decorated with nickel nitride nanoparticles directly grown on conductive nickel foam as an efficient trifunctional electrocatalyst for the SOR, oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). Optimized Ni3S2/Ni3N showed lower electrode potentials of 0.25, 1.487, and 0.89 V to achieve a benchmark current density of 10 mA cm(-2) for the SOR, OER, and HER, respectively. The hybrid H2S electrolysis setup employing a Ni3S2/Ni3N electrocatalyst drastically reduced the cell potential by 1.24 V compared to that of conventional water electrolysis at a current density of 200 mA cm(-2). Having said that, heterostructure formation not only enhances the activity for the SOR but also helps to avoid sulfur poisoning, enabling the electrocatalyst to sustain for 100 long hours at a high current density of 100 mA cm(-2). Consequently, the approach with the developed electrocatalyst has the ability to reduce the energy consumption by 59.22\%, which can make rigorous, economically viable H-2 production driven by solar energy.</p>
},
	keywords = {energy-economic, H-2 production, H2S electrolysis, heterostructure, solidsulfur},
	issn = {2574-0962},
	doi = {10.1021/acsaem.5c01952},
	author = {Sinha, Nibedita and Das, Chandni and Pal, Santanu and Roy, Poulomi}
}
@article {49710,
	title = {Enhanced electrocatalytic performances of NiCr layered double hydroxides by oxalate intercalation in anion exchange membrane water electrolysis},
	journal = {ACS Applied Materials \& Interfaces},
	volume = {17},
	year = {2025},
	month = {JUN},
	pages = {37863-37878},
	type = {Article},
	abstract = {<p>
	Layered double hydroxides (LDHs) have attracted much attention these days in the field of water electrolysis due to easy modulation in their layered structure and properties. Herein, NiCr-LDH has been developed, and its interlayer spacing has been considerably increased by oxalate intercalation. Such increased interlayer spacing allows easy access of hydroxides to a large number of electroactive sites and thereby boosts the electrocatalytic performances both for oxygen and hydrogen evolution reactions. Being very active toward both the electrocatalytic reactions, the oxalate-intercalated NiCr-LDH was further explored in an alkaline anion exchange membrane water electrolyzer (AEMWE), achieving 800 mA cm-2 at 1.88 V cell voltage at an operating temperature of 60 degrees C. In fact, the electrolyzer efficiency has been determined to be as high as 69.66\%, and the calculated H2 production cost was found to be \$0.97 per gasoline-gallon equivalent, which is well below the targeted cost by the Department of Energy, USA. The electrocatalyst was also examined in harsh alkaline media, like highly saline or seawater, which also indicated its ability to carry out sustainable seawater electrolysis, restricting chlorides to a great extent. Interestingly, post-electrolysis characterization reveals the fact that oxalate decomposition aided carbonate formation within interlayers of NiCr-LDH, and high affinity toward hydroxides is responsible for restricting chlorides during the electrolysis process, apart from the great electrocatalytic activity.</p>
},
	keywords = {Anion exchange, hydrogen production, interlayerspacing, Layered double hydroxide, Sustainable, water electrolyzer},
	issn = {1944-8244},
	doi = {10.1021/acsami.5c04189},
	author = {Pal, Santanu and Sinha, Nibedita and Das, Chandni and Chauhan, Inderjeet and Ahmed, Tanbir and Roy, Poulomi}
}
