Boosting hydrogen evolution performance of nanoporous Fe-Pd alloy electrocatalyst by metastable phase engineering

Li, Zhangyi; Wang, Chaoyang; Liang, Yanqin; Jiang, Hui; Wu, Shuilin; Li, Zhaoyang; Xu, Wence; Zhu, Shengli; Cui, Zhenduo

doi:10.1016/j.apcatb.2023.123677

Applied Catalysis B: Environmental

2024

DOI: 10.1016/j.apcatb.2023.123677

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Boosting hydrogen evolution performance of nanoporous Fe-Pd alloy electrocatalyst by metastable phase engineering

Zhangyi Li,

Chaoyang Wang,

Yanqin Liang

et al.

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2024

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Cited by 5 publications

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Crystal‐Phase‐ and B‐Content‐Dependent Electrochemical Behavior of Pd─B Nanocrystals toward Oxygen Reduction Reaction

Wahidah,

Chun,

Kim

et al. 2024

Small

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The manipulation of crystal phases in metal–nonmetal interstitial alloy nanostructures has attracted considerable attention due to the formation of unique electronic structures and surface atomic arrangements, resulting in unprecedented catalytic performances. However, achieving simultaneous control over crystal phase and nonmetal elements in metal–nonmetal interstitial alloy nanostructures has remained a formidable challenge. Here, a novel synthesis approach is presented for Pd─B interstitial alloy nanocrystals (NCs) that allows investigation of the crystal‐phase‐ and B‐content‐dependent catalytic performance. Through comparison of the oxygen reduction reaction (ORR) properties of Pd─BX interstitial alloy NCs with different crystal phases and B contents, achieved by precise control of reaction temperature and time, the influences of crystal phase and B contents in the Pd─BX interstitial alloy NCs on ORR are precisely investigated. The hexagonal closed packed (hcp) PdB0.5 NCs exhibit superior catalytic activity, with mass activities reaching 2.58 A mg−1, surpassing Pd/C by 10.3 times, attributed to synergistic effects by the hcp crystal phase and relatively high B contents. This study not only provides a novel approach to fabricate interstitial alloy nanostructures with unconventional crystal phases and finely controlled nonmetal elements but also elucidates the importance of crystal phase and nonmetal element content in optimizing electrocatalytic efficiency.

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Crystal‐Phase‐ and B‐Content‐Dependent Electrochemical Behavior of Pd─B Nanocrystals toward Oxygen Reduction Reaction

Wahidah,

Chun,

Kim

et al. 2024

Small

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Verstärkung von Stahlkonstruktionen mit Memory‐Stahl

Ghafoori,

Possekel,

Wang

et al. 2024

Stahlbau

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Dieser Aufsatz gibt einen Überblick über jüngste Arbeiten zur Entwicklung und Anwendung von Formgedächtnislegierungen auf Eisenbasis (Fe‐SMA), den sog. Memory‐Stählen, für Verstärkungs‐ und Instandsetzungsmaßnahmen an Stahlkonstruktionen. Zunächst werden Studien zu den Materialeigenschaften von Fe‐SMA bezüglich Formgedächtniseffekt und Pseudoelastizität erörtert. Anschließend wird der Einsatz von Fe‐SMA als vorgespannte Verstärkungsmaßnahme bei Stahlkonstruktionen erläutert. Hierbei wird auf Verstärkungen von Stahlträgern, Verbindungen und die Reparatur von Ermüdungsrissen eingegangen. Es werden verschiedene Verstärkungslösungen wie mechanisch verankerte oder geklebte Fe‐SMA sowie Studien über das Verhalten von Fe‐SMA‐Stahlverbindungen diskutiert. Ein Anwendungsfall wird anhand einer 113 Jahre alten Stahlbrücke vorgestellt. Zusätzlich wird die Anwendung von Fe‐SMA für Rohrkupplungen gezeigt. Abschließend werden innovative Untersuchungen aus der laufenden Forschung zum Thema additive Fertigung von Fe‐SMA (4D‐Druck) erörtert.

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Next-Generation Green Hydrogen: Progress and Perspective from Electricity, Catalyst to Electrolyte in Electrocatalytic Water Splitting

Gao,

Chen,

Wang

et al. 2024

Nano-Micro Lett.

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Green hydrogen from electrolysis of water has attracted widespread attention as a renewable power source. Among several hydrogen production methods, it has become the most promising technology. However, there is no large-scale renewable hydrogen production system currently that can compete with conventional fossil fuel hydrogen production. Renewable energy electrocatalytic water splitting is an ideal production technology with environmental cleanliness protection and good hydrogen purity, which meet the requirements of future development. This review summarizes and introduces the current status of hydrogen production by water splitting from three aspects: electricity, catalyst and electrolyte. In particular, the present situation and the latest progress of the key sources of power, catalytic materials and electrolyzers for electrocatalytic water splitting are introduced. Finally, the problems of hydrogen generation from electrolytic water splitting and directions of next-generation green hydrogen in the future are discussed and outlooked. It is expected that this review will have an important impact on the field of hydrogen production from water. Graphical Abstract

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Boosting hydrogen evolution performance of nanoporous Fe-Pd alloy electrocatalyst by metastable phase engineering

Cited by 5 publications

References 49 publications

Crystal‐Phase‐ and B‐Content‐Dependent Electrochemical Behavior of Pd─B Nanocrystals toward Oxygen Reduction Reaction

Crystal‐Phase‐ and B‐Content‐Dependent Electrochemical Behavior of Pd─B Nanocrystals toward Oxygen Reduction Reaction

Verstärkung von Stahlkonstruktionen mit Memory‐Stahl

Next-Generation Green Hydrogen: Progress and Perspective from Electricity, Catalyst to Electrolyte in Electrocatalytic Water Splitting

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