Preparation of Ordered Intermetallic Compounds and Their Application in Electrocatalytic Reactions

Gunji, Takao

doi:10.5796/electrochemistry.21-00081

Cited by 2 publications

(2 citation statements)

References 60 publications

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“…Intermetallics often display enhanced electrocatalytic performance for a variety of reactions. − In the case of Pd 3 Bi, the ORR performance was compared to Pt/C and Pd/C standards. The onset potential of Pd 3 Bi prepared by the electrochemically induced phase conversion was ∼0.97 V vs the reversible hydrogen electrode (RHE) which was less positive than Pt/C (1.0 V vs RHE) and Pd/C (1.05 V vs RHE) .…”

Section: Electrochemical Dealloyingmentioning

confidence: 99%

Electrochemical Synthesis of Nanostructured Ordered Intermetallic Materials under Ambient Conditions

et al. 2023

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Metrics & MoreArticle Recommendations CONSPECTUS:The enhanced catalytic properties of alloy nanostructures have made them a focus of extensive research in the field of catalysis. Alloy nanostructures can be classified into two types: disordered alloys (also known as solid solutions) and ordered intermetallics. The latter are of particular interest as they possess long-range atomic scale ordering, which leads to well-defined active sites that can be used to accurately assess structure−property relationships and their impact on (electro)catalytic performance. While many ordered intermetallics (OICs) have been synthesized and evaluated as electrocatalysts, there is still a lack of understanding on how the local structure of atoms controls their catalytic performance. Ordered intermetallics are difficult to synthesize and often require high-temperature annealing for the atoms to equilibrate into ordered structures. High temperature processing results in aggregated structures (usually >30 nm) and/or contamination from the support, which can decrease their performance and preclude these materials from being used as model systems for elucidating insight into structure and electrochemical properties. Therefore, alternative methods are required to enable more efficient atomic ordering while maintaining some level of morphological control.This Account delves into the potential of electrochemical methods as a practical alternative for synthesizing ordered intermetallics at lower temperatures. Specifically, it explores the viability of electrochemical dealloying and electrochemical deposition to synthesize Pd−Bi and Cu−Zn intermetallics at room temperature and atmospheric pressure. These methods have proven useful in synthesizing phases that are typically inaccessible under ambient conditions. The high homologous temperatures at which these materials are synthesized provide the necessary atomic mobility required for equilibration and formation of ordered phases, thus making the direct synthesis of ordered intermetallic materials at room temperature by electrochemical means a reality. Beyond synthesis, the electrocatalytic performance of these intermetallics was assessed for the oxygen reduction reaction (ORR), which is an important process employed in fuel cells. The OICs displayed increased performance with respect to commercial Pd/C and Pt/C benchmarks because of lower coverages of spectator species. Furthermore, these materials exhibited improved methanol tolerance.This Account provides valuable insights into the electrochemical synthesis of ordered intermetallics and their potential use as highly effective catalysts for electrocatalytic reactions. By using electrochemical methods, it is possible to obtain ordered intermetallics with unique atomic arrangements and tailored properties, which can be optimized for specific catalytic applications. With further research, electrochemical synthesis methods may enable the development of new and improved ordered intermetallics with even higher catalytic activity and selectivity, m...

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Section: Electrochemical Dealloyingmentioning

confidence: 99%

Electrochemical Synthesis of Nanostructured Ordered Intermetallic Materials under Ambient Conditions

et al. 2023

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“…Moreover, he designed new intermetallic compounds and applied them to fuel cell electrocatalysts and cocatalysts for photocatalytic and electrochemical reduction of CO 2 . 42 Another awardee, Minaminoto is currently an assistant professor of Hokkaido University. He received his PhD in engineering from Osaka University in 2015.…”

Section: The Young Researcher Award Of the Electrochemical Society Of Japan (Sano Award)mentioning

confidence: 99%

History of ECSJ Awards and Introduction of Award Winners in 2021

Atobe

Mizuhata

2021

Electrochemistry

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The Electrochemical Society of Japan (ECSJ) has been publishing comprehensive papers related to the achievements of researchers who are awarded by ECSJ annually since 2014. The origin of the society awards, we can see that they began as Tanahashi Paper Awards. In order to promote the use of this journal an academic and industrial outcomes from the activity of ECSJ members, the editorial board would like to introduce the society awards and the awardees' achievements as an award-winning feature article.

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Preparation of Ordered Intermetallic Compounds and Their Application in Electrocatalytic Reactions

Cited by 2 publications

References 60 publications

Electrochemical Synthesis of Nanostructured Ordered Intermetallic Materials under Ambient Conditions

Electrochemical Synthesis of Nanostructured Ordered Intermetallic Materials under Ambient Conditions

History of ECSJ Awards and Introduction of Award Winners in 2021

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