@article {49596,
	title = {Hot injection assisted electronically modulated twin and grain boundary rich sub-2 nm pt3co alloy resistant to phosphate ion for PEMFCs},
	journal = {Small},
	volume = {21},
	year = {2025},
	month = {MAY},
	type = {Article},
	abstract = {<p>
	Modulation of the electronic d-band center, structural defects (line defects), and particle size of Pt3Co alloy electrocatalyst have huge significance in elevating its electrochemical oxygen reduction reaction activity. Deviating from traditional high-temperature strategies, the current work focuses on ripening these benefits by implying a simple economically viable hot-injection-assisted modified polyol process. A conclusive control over decrementing particle size starting from 2.7 to 1.3 nm, an increasing degree of strain (twin boundary), and shifting of the d-band center away from the Fermi level are obtained via varying the temperature to which the solution is injected. The catalyst prepared via the injection at 200 degrees C (Pt3Co(1.3 t,g-b)/fVC-200) has delivered an electrochemical surface area of 84 m(2) g(Pt)(-1) with the onset and half-wave potentials of 0.980 and 0.858 V, respectively, versus RHE and a limiting current of -6.0 mA cm(-2) with stability till 20k cycles. In the high-temperature proton exchange membrane fuel cell Pt3Co(1.3 t,g-b)/fVC-200-based cell has outperformed Pt/C rendering 600 mWcm(-2) under H-2-Air compared to 529 mWcm(-2) of Pt/C with 20\% lower Pt loading and double the stability due to enhanced resistance toward phosphoric acid for accelerated voltage cycling. A similar enhancement is seen while employing the catalyst for low-temperature fuel cells.</p>
},
	keywords = {electrocatalyst, grain boundary, hot injection synthesis, modified polyol process, oxygen reduction reaction, proton exchange membrane fuel cell, Pt3Co alloy, twin boundary, valance band X-ray photoelectron spectroscopy},
	issn = {1613-6810},
	doi = {10.1002/smll.202500954},
	author = {Singh, Mayank U. and Jadhav, Swapnil D. and Shivankar, Bhavana R. and Pandikassala, Ajmal and Kumar, Yogesh and Krishnamurty, Sailaja and Vinod, C. P. and Kurungot, Sreekumar}
}
@article {49531,
	title = {Self-supported super-hydrophilic interconnected nanospikes and particles of MoS2-Ni3S2/NF with optimum d-band center for anion exchange membrane water electrolyzer},
	journal = {Advanced Sustainable Systems},
	volume = {9},
	year = {2025},
	month = {MAR},
	type = {Article},
	abstract = {<p>
	There is an imperative need for highly efficient electrocatalysts for cost-effective hydrogen production. Herein, a self-supported, hybrid composite as a bifunctional electrocatalyst is introduced. This is achieved by in situ growth of MoS2-Ni3S2 on nickel foam (NF), designated as MoS2-Ni3S2/NF, synthesized by a facile one-step hydrothermal synthesis method. MoS2-Ni3S2/NF exhibits low overpotentials of only 187 and 146 mV for OER and HER, respectively, to achieve a current density of 10 mA cm-2 in 1 M KOH. The practical application of the designed bifunctional electrocatalyst is verified by constructing the MoS2-Ni3S2/NF || MoS2-Ni3S2/NF symmetrical membrane electrode assembly (MEA) of 4 cm2 working area for the anion exchange membrane water electrolyzer. The system shows continuous electrolysis for the monitored 48 h duration. For OER, an optimum d-band center of -1.66 eV for the heterostructure is calculated from the Density Functional Theory (DFT) studies. The factors like the unique structure of the electrocatalyst, enhanced hydrophilicity, improved electrochemically accessible number of sites (ECASs), and optimum d-band center, are expected to be the primary contributors to the system{\textquoteright}s improved performance. Thus, the present finding unveils a straightforward synthesis approach for creating a stable electrocatalyst for advancing commercial water electrolysis in the realm of renewable electrochemical energy conversion.</p>
},
	keywords = {AEM, d-band center, electrolyzer, HER, OER},
	issn = {2366-7486},
	doi = {10.1002/adsu.202400957},
	author = {Kumar, Yogesh and Barik, Sidharth and Samudre, Nikhil S. and Kharabe, Geeta Pandurang and Chauhan, Inderjeet and Manna, Narugopal and Bhat, Suresh and Kurungot, Sreekumar}
}
