Challenging the Durability of Intermetallic Mo-Ni Compounds in the Hydrogen 
Evolution Reaction

Rößner, Leonard; Schwarz, Holger; Veremchuk, Igor; Zerdoumi, Ridha; Seyller, Thomas; Armbrüster, Marc

doi:10.1021/acsami.1c02169

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

タグ情報を表示リリース履歴を表示詳細要約

公開

学術論文

Challenging the Durability of Intermetallic Mo-Ni Compounds in the Hydrogen Evolution Reaction

MPS-Authors

/persons/resource/persons126891

Veremchuk, Igor
Igor Veremchuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource

There are no locators available

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

公開されているフルテキストはありません

付随資料 (公開)

There is no public supplementary material available

引用

Rößner, L., Schwarz, H., Veremchuk, I., Zerdoumi, R., Seyller, T., & Armbrüster, M. (2021). Challenging the Durability of Intermetallic Mo-Ni Compounds in the Hydrogen Evolution Reaction. ACS Applied Materials and Interfaces, 13(20), 23616-23626. doi:10.1021/acsami.1c02169.

引用: https://hdl.handle.net/21.11116/0000-0008-AC97-C

要旨

Molybdenum-nickel materials are catalysts of industrial interest for the hydrogen evolution reaction (HER). Well-characterized surfaces of the single-phase intermetallic compounds Ni7Mo7, Ni3Mo, and Ni4Mo were subjected to accelerated durability tests (ADTs) and thorough characterization to unravel whether crystallographic ordering affects the activity. Their intrinsic instability leads to molybdenum leaching, resulting in higher specific surface areas and nickel-enriched surfaces. These are more prone to form Ni(OH)2 layers, which leads to deactivation of the Mo-Ni materials. The crystal structure of the intermetallic compounds has, due to the intrinsic instability of the materials in alkaline media, no effect on the activity. Ni7Mo7, identified earlier as durable, proves to be highly unstable in the applied ADTs. The results show that the enhanced activity of unsupported bulk Mo-Ni electrodes can solely be ascribed to increased specific surface areas. © 2021 The Authors. Published by American Chemical Society.