Rare-Earth Oxychlorides as Promoters of Ruthenium Toward High-Performance Hydrogen Evolution Electrocatalysts for Alkaline Electrolyzers

IF 27.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Pub Date : 2025-02-09 DOI:10.1002/adma.202417621

Tongtong Liu, Yanan Chen, Xinyu Wang, Yajing Di, Klaus Müllen, Zhengping Zhang, Feng Wang

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Abstract

Developing efficient electrocatalysts for hydrogen evolution reaction (HER) in alkaline environments is vital for hydrogen production, owing to the extra water dissociation and hydroxyl desorption steps. Here, rare-earth oxychlorides (REOCl) are proposed as innovative promoters for ruthenium as HER electrocatalyst in alkali. The lamellar structure of REOCl with weakly bond [Cl] layers can facilitate the formation of an internal electric field that enhances interphase charge transfer. Taking ruthenium/ neodymium oxychloride (Ru/NdOCl) composites as a case study, sub ≈4 nm Ru nanoparticles are successfully embedded into NdOCl crystals through a rapid self-exothermic process, and the highly-coupled Ru−Cl/O−Nd interfaces are observed as metallic Ru particles with the edge of the NdOCl lamellar layers, where the [Nd₂O₂] and [Cl] layers act as the negative and positive charge transfer channels, respectively. The enhanced charge transfer between REOCl and Ru makes the highly-coupled Ru/REOCl catalysts show better electrocatalytic activity than both the benchmark Pt and Ru catalysts in alkaline electrolyte. This work will encourage more novel promoters for electrocatalysis and other emerging technologies.

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由于需要额外的水解离和羟基解吸步骤，在碱性环境中开发高效的氢进化反应（HER）电催化剂对制氢至关重要。在这里，稀土氧氯化物（REOCl）被提议作为钌在碱性环境中作为氢进化反应电催化剂的创新促进剂。REOCl 的层状结构具有弱键[Cl]层，可促进内部电场的形成，从而增强相间电荷转移。以钌/氧氯化钕（Ru/NdOCl）复合材料为例，通过一个快速的自放热过程，亚≈4 nm 的 Ru 纳米粒子被成功嵌入 NdOCl 晶体中，并在 NdOCl 片层边缘观察到高度耦合的 Ru-Cl/O-Nd 界面，其中[Nd2O2]层和[Cl]层分别作为负电荷和正电荷的转移通道。REOCl 和 Ru 之间电荷转移的增强使得高度耦合的 Ru/REOCl 催化剂在碱性电解质中比基准的 Pt 和 Ru 催化剂表现出更好的电催化活性。这项工作将鼓励更多新型促进剂用于电催化和其他新兴技术。

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来源期刊

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.