ItemArticle

Negative-Valent Palladium-Stabilized CoPdN Thin Films as a Catalyst for the Oxygen Evolution Reaction

Title
Negative-Valent Palladium-Stabilized CoPdN Thin Films as a Catalyst for the Oxygen Evolution Reaction
Creator
A, Akshaya; Bhamu, K.C.; Kalal, Shailesh; Bhabal, Rinkoo; Tayal, Akhil; Gloskovskii, Andrei; Zema, N.; Patel, Nainesh; Kang, Sung Gu; Hsiao, Ching-Lien; Gupta, Mukul
Description
The urgent global demand for sustainable energy drives the search for durable and efficient electrocatalysts for water splitting. Cobalt mononitride (CoN) stands out due to its earth abundance, high conductivity, and corrosion resistance, but its thermodynamic instability often results in cobalt-rich secondary phases. Here, we report a scalable reactive cosputtering approach for the controlled synthesis of CoN thin films, along with palladium (Pd) incorporation to enhance activity and stability. Pd doping induces a negative valence state and promotes electron transfer from nitrogen to Pd sites, thereby refining the microstructure, redistributing charge, and shifting the d-band center away from the Fermi level. These synergistic effects reduce the overpotential from 470 to 360 mV at 10 mAcm2 in a sample coated on the ITO substrate and deliver markedly improved long-term OER stability with increased catalytically active sites. The turnover frequency showed nearly twice the intrinsic activity with Pd doping. This work establishes Pd-doped CoN as a high-performance, durable electrocatalyst, offering a scalable pathway toward efficient water splitting technologies. 2025 American Chemical Society
Source
ACS Applied Nano Materials;Volume;8;Issue;50;pp.24003-24012
Date
01-01-2025
Publisher
American Chemical Society
Subject
cobalt mononitride; magnetron sputtering; oxygen evolution reaction; transition metal nitride
Coverage
A A., UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, 452001, India; Bhamu K.C., Department of Physics, SLAS, Mody University of Science and Technology, Lakshmangarh, Rajasthan, Sikar, 332311, India; Kalal S., Department of Physics, Chemistry and Biology, Linkings Universitet, Linking, SE-581 83, Sweden; Bhabal R., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Tayal A., Deutsches Elektronen-Synchrotron, Notkestrasse 85, Hamburg, 22607, Germany; Gloskovskii A., Deutsches Elektronen-Synchrotron, Notkestrasse 85, Hamburg, 22607, Germany; Zema N., Istituto Struttura della Materia-CNR (ISM-CNR), Via del Fosso del Cavaliere 100, Roma, 00133, Italy; Patel N., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Kang S.G., School of Chemical Engineering, University of Ulsan, Ulsan Daehak-ro 93 Nam-gu, Ulsan, 44610, South Korea; Hsiao C.-L., Department of Physics, Chemistry and Biology, Linkings Universitet, Linking, SE-581 83, Sweden; Gupta M., UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, 452001, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 25740970;
Format
online
Language
English
Type
Article

Citation

A, Akshaya; Bhamu, K.C.; Kalal, Shailesh; Bhabal, Rinkoo; Tayal, Akhil; Gloskovskii, Andrei; Zema, N.; Patel, Nainesh; Kang, Sung Gu; Hsiao, Ching-Lien; Gupta, Mukul, “Negative-Valent Palladium-Stabilized CoPdN Thin Films as a Catalyst for the Oxygen Evolution Reaction,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/22505.

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