ItemArticle

Mixed CoO/Co3O4 phase nanoparticles encapsulated in a carbon shell derived from Co-MOF as a bifunctional electrocatalyst for scalable hydrogen production

Title
Mixed CoO/Co3O4 phase nanoparticles encapsulated in a carbon shell derived from Co-MOF as a bifunctional electrocatalyst for scalable hydrogen production
Creator
Bhabal, Rinkoo; Bhide, Aniruddha; Gupta, Suraj; Fernandes, Rohan; Gupta, Mukul; Patel, Nainesh
Description
Designing high-performance and long-lasting electrocatalysts is essential to enable large-scale green hydrogen generation through water electrolysis. Herein, we present a bifunctional electrocatalyst, C@CoxOy-B/P-700, obtained by pyrolyzing a Co-MOF under N2 atmosphere, followed by phospho-boronization. Extensive characterization revealed the formation of nanoparticles composed of combined Co3O4 and CoO phases encapsulated by a thin carbon shell. This unique architecture provided electron transport and active site accessibility, while the co-incorporation of boron and phosphorus induced abundant oxygen vacancies, enhancing intrinsic kinetics. In alkaline media, low overpotentials of 220 and 79 mV are required at 10 mA/cm2 for OER and HER, along with excellent durability, maintaining performance over 10,000 cycles and 100 h of continuous operation. When implemented in a symmetric two-electrode configuration, it achieves a current density of 10 mA/cm2 at just ?1.57 V, rivalling noble-metal-based systems. Furthermore, scale-up in a zero-gap alkaline electrolyzer confirms industrial applicability, requiring ?1.72 V to achieve a 500 mA/cm2 at 60 C with a negligible degradation rate. These results emphasize the promise of C@CoxOy-B/P-700 as a sustainable and scalable solution for next-generation hydrogen production. 2025 Elsevier Ltd.
Source
Carbon;Volume;247;Issue;;Article No.;121031;
Date
01-01-2026
Publisher
Elsevier Ltd
Subject
Bifunctional electrocatalyst; Carbon layer; Hydrogen production; Metal organic framework; Water electrolysis
Coverage
Bhabal R., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Bhide A., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Gupta S., Advanced Materials Department, Joef Stefan Institute, Jamova 39, Ljubljana, 1000, Slovenia; Fernandes R., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India; Gupta M., UGC, DAE Consortium for Scientific Research, Khandwa Road, Madhya Pradesh, Indore, 452001, India; Patel N., Department of Physics and Electronics, Christ University, Bengaluru, 560029, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 86223; CODEN: CRBNA
Format
online
Language
English
Type
Article

Citation

Bhabal, Rinkoo; Bhide, Aniruddha; Gupta, Suraj; Fernandes, Rohan; Gupta, Mukul; Patel, Nainesh, “Mixed CoO/Co3O4 phase nanoparticles encapsulated in a carbon shell derived from Co-MOF as a bifunctional electrocatalyst for scalable hydrogen production,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 19, 2026, https://archives.christuniversity.in/items/show/22212.

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