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The Remarkable Rise in High-Entropy Catalysts: A New Paradigm for Sustainable Hydrogen Production.

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Title: The Remarkable Rise in High-Entropy Catalysts: A New Paradigm for Sustainable Hydrogen Production.
Authors: Ahmad, Abid1,2 (AUTHOR), Bhat, Irshad2,3 (AUTHOR), Liu, Qian1,3 (AUTHOR), Zhang, Min1,2 (AUTHOR), Lv, Sihao1,2 (AUTHOR), Cheng, Faliang2,3 (AUTHOR), Li, Wei1,2 (AUTHOR)
Source: Nanomaterials (2079-4991). May2026, Vol. 16 Issue 9, p548. 27p.
Subjects: Hydrogen evolution reactions, High-entropy alloys, Catalysts, Green fuels, Chemical stability, Electronic band structure
Abstract: The hydrogen evolution reaction (HER) is a cornerstone of green hydrogen production, yet its efficiency is constrained by the sluggish kinetics of water splitting. High-entropy catalysts (HECs), single-phase materials incorporating multiple principal elements, have emerged as a transformative solution. Their unique attributes including vast compositional flexibility, tunable electronic structures, and synergistic multi-element interactions, enable them to overcome the activity, stability, and cost limitations of conventional catalysts. Despite rapid performance advancements, the rational design of HECs is fundamentally hampered by critical knowledge gaps, particularly in identifying true active sites under operando conditions and predicting long-term stability. This work critically assesses these challenges, systematically summarizing the latest progress in HECs design, synthesis, and structure–activity relationships. By bridging fundamental principles with practical applications, we provide a forward-looking perspective on key research directions. Distinct from recent progress-focused reviews, this work establishes a strategic roadmap by systematically diagnosing seven grand challenges across the science-to-technology pipeline and proposing corresponding countermeasures. This framework aims to guide future research efforts toward the rational design and practical deployments of HECs for practical and cost-effective green hydrogen production. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. May2026, Vol. 16 Issue 9, p548. 27p.
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  Data: <searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22High-entropy+alloys%22">High-entropy alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Green+fuels%22">Green fuels</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+stability%22">Chemical stability</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+band+structure%22">Electronic band structure</searchLink>
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  Data: The hydrogen evolution reaction (HER) is a cornerstone of green hydrogen production, yet its efficiency is constrained by the sluggish kinetics of water splitting. High-entropy catalysts (HECs), single-phase materials incorporating multiple principal elements, have emerged as a transformative solution. Their unique attributes including vast compositional flexibility, tunable electronic structures, and synergistic multi-element interactions, enable them to overcome the activity, stability, and cost limitations of conventional catalysts. Despite rapid performance advancements, the rational design of HECs is fundamentally hampered by critical knowledge gaps, particularly in identifying true active sites under operando conditions and predicting long-term stability. This work critically assesses these challenges, systematically summarizing the latest progress in HECs design, synthesis, and structure–activity relationships. By bridging fundamental principles with practical applications, we provide a forward-looking perspective on key research directions. Distinct from recent progress-focused reviews, this work establishes a strategic roadmap by systematically diagnosing seven grand challenges across the science-to-technology pipeline and proposing corresponding countermeasures. This framework aims to guide future research efforts toward the rational design and practical deployments of HECs for practical and cost-effective green hydrogen production. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano16090548
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        Text: English
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        PageCount: 27
        StartPage: 548
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      – SubjectFull: Hydrogen evolution reactions
        Type: general
      – SubjectFull: High-entropy alloys
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      – SubjectFull: Catalysts
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      – SubjectFull: Green fuels
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      – SubjectFull: Chemical stability
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      – SubjectFull: Electronic band structure
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      – TitleFull: The Remarkable Rise in High-Entropy Catalysts: A New Paradigm for Sustainable Hydrogen Production.
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            NameFull: Ahmad, Abid
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              M: 05
              Text: May2026
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              Y: 2026
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