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In-situ growth of nonstoichiometric CrO0.87 and Co3O4 hybrid system for the enhanced electrocatalytic water splitting in alkaline media

Solangi, Muhammad Yameen (author)
Mehran Univ Engn & Technol, Pakistan
Aftab, Umair (author)
Mehran Univ Engn & Technol, Pakistan
Tahira, Aneela (author)
Shah Abdul Latif Univ Khairpur Mirs, Pakistan
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Hanan, Abdul (author)
Harbin Engn Univ, Peoples R China
Montecchi, Monica (author)
Univ Modena & Reggio Emilia, Italy
Pasquali, Luca (author)
Univ Modena & Reggio Emilia, Italy; IOM CNR Inst, Italy; Univ Johannesburg, South Africa
Tonezzer, Matteo (author)
Univ Cagliari, Italy
Mazzaro, Raffaello (author)
CNR, Italy
Morandi, Vittorio (author)
CNR, Italy
Laghari, Abdul Jaleel (author)
Mehran Univ Engn & Technol, Pakistan
Nafady, Ayman (author)
King Saud Univ, Saudi Arabia
Abro, Muhammad Ishaq (author)
Mehran Univ Engn & Technol, Pakistan
Emo, Melanie (author)
Univ Lorraine, France
Vigolo, Brigitte (author)
Univ Lorraine, France
Dawi, Elmuez (author)
Ajman Univ, U Arab Emirates
Mustafa, Elfatih Mohammed (author)
Linköpings universitet,Fysik, elektroteknik och matematik,Tekniska fakulteten
Ibupoto, Zafar Hussain (author)
Univ Sindh, Pakistan
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 (creator_code:org_t)
PERGAMON-ELSEVIER SCIENCE LTD, 2023
2023
English.
In: International journal of hydrogen energy. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0360-3199 .- 1879-3487. ; 48:93, s. 36439-36451
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The development of electrocatalysts for electrochemical water splitting has received considerable attention in response to the growing demand for renewable energy sources and environmental concerns. In this study, a simple hydrothermal growth approach was developed for the in-situ growth of non-stoichiometric CrO0.87 and Co3O4 hybrid materials. It is apparent that the morphology of the prepared material shows a heterogeneous aggregate of irregularly shaped nanoparticles. Both CrO0.87 and Co3O4 have cubic crystal structures. Its chemical composition was governed by the presence of Co, Cr, and O as its main constituents. For understanding the role CrO0.87 plays in the half-cell oxygen evolu-tion reaction (OER) in alkaline conditions, CrO0.87 was optimized into Co3O4 nanostructures. The hybrid material with the highest concentration of CrO0.87 was found to be highly efficient at driving OER reactions at 255 mV and 20 mA cm(-2). The optimized material demonstrated excellent durability for 45 h and a Tafel slope of 56 mV dec(-1). Several factors may explain the outstanding performance of CrO0.87 and Co3O4 hybrid materials, including multiple metallic oxidation states, tailored surface properties, fast charge transport, and surface defects. An alternative method is proposed for the preparation of new generations of electrocatalysts for the conversion and storage of energy. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Subject headings

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

Keyword

Nonstoichiometric growth; CrO0.87 and Co3O4 hybrid material; Oxygen evolution reaction

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ref (subject category)
art (subject category)

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