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在3D Fe-Doped β-Ni(OH) ₂上定的的单原子调节电子结构,具有纳米金字塔阵列结构的催化剂,用于增强氧气进化反应反应

Hongjun Kang^1,2, Xianshu Qiao¹, Xin Jia¹

¹School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|March 10, 2024

概括

为氧化演化反应 (OER) 开发先进的电催化剂是可持续能源的关键. 这项研究在Fe-doped Ni(OH) 2上引入了单个原子,实现了卓越的OER性能和效率.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

为氧化演化反应 (OER) 开发高效的电催化剂对于推动清洁能源生产至关重要.
当前的挑战包括在电催化系统中实现高活性和稳定性.

研究的目的:

开发一种具有增强OER性能的新型电催化剂.
调查改善的催化活性背后的机制.

主要方法:

采用自发的氧化还原策略,将单个原子固定在基于层次纳米板的多孔Fe-doped β-Ni(OH) 2金字塔阵列电极上.
在性电解质中评估了电化学性能.

主要成果:

合成的SAS Ir/Fe-β-Ni(OH) 2电极表现出极好的OER性能,在10 mA cm-2.2时具有175 mV的低超电位.
与Fe-β-Ni(OH) 2 / NF和IrO2相比,催化剂显示出明显更高的OER电流密度.
机制研究表明,单个Ir原子增强了*OH到*O的转化和活性晶格氧含量.

结论:

单原子的Ir修饰有效地增强了FeNi (氧) 氧化物活性物种的电子结构和氧化还原行为.
这项工作提供了对OER增强机制的有价值的见解,在Ir单原子改性FeNi-氧化物系统中.
开发的催化剂对可持续能能源的应用非常有前景.

关键词:

在Fe中添加β-Ni(OH) 2纳米板.直接的O─O债券合氧气进化反应反应氧气进化反应一个原子的和.自发的氧化还原策略.

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