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Updated: Sep 13, 2025

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在原子分散的Ni催化剂中确定Ni-N₄活性位点,以实现高效的演化反应

Jinjong Kim¹, Taejung Lim², David Hernández-Castillo³

¹Department of Chemistry, Seoul National University, Seoul 08826, Republic of Korea.

Journal of the American Chemical Society

|July 29, 2025

概括

研究人员为演化反应 (CER) 开发了非组金属 (非PGM) 原子分散催化剂 (ADC). 基于的ADC显示出优异的CER活性,超过商业催化剂,为无PGM的CER催化铺平了道路.

科学领域:

电化学
材料科学
催化剂

背景情况:

演化反应 (CER) 对于通过-过程的工业生产至关重要.
基于白金组金属 (PGM) 的维度稳定阳极 (DSA) 历来主导了CER催化.
原子分散催化剂 (ADC) 是一个有希望的替代品,但仍然依赖于PGM.

研究的目的:

为电化学演化反应 (CER) 开发和研究基于非PGM的原子分散催化剂 (ADC).
在各种非PGM ADC中确定CER反应性的趋势.
阐明非PGM ADC中高CER活动的活性点.

主要方法:

不基于PGM (Fe,Co,Ni,Cu) 的ADC的合成
电化学评估CER活动和动力学.
在现场进行X射线吸收光谱 (XAS) 和X射线光电子光谱 (XPS) 分析.
密度函数理论 (DFT) 的计算.

主要成果:

在经过测试的非PGM催化剂中,基于的ADC表现出最高的CER活性和动力学.
ADC的CER活动超过了商业DSA和以前报告的非PGM催化剂.
现场光谱和DFT计算确定了Ni-N4基因为CER的主要活性部位.
加载研究证实了Ni-N4位点在生产中的作用.

结论:

非PGM的ADC,特别是基于Ni的ADC,对演化反应非常有效.
Ni-N4基因是有效的CER催化的一个关键活性位点.
这些发现支持在工业生产中开发无PGM的ADC.

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