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在工业条件下高的异构结构的现场重建稳定的氧气演变的催化剂工业条件下的电催化剂

Jue Hu^1,2,3, Tianqi Guo⁴, Xinyu Zhong^5,6

¹Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China.

Advanced materials (Deerfield Beach, Fla.)

|January 3, 2024

概括

这项研究引入了一种新型的高合金氧化物异质催化剂,用于水分裂中高度稳定和高效的氧化演化反应. 该材料在恶劣的工业条件下表现出异常的耐用性.

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:

电化学分水对于清洁能源生产至关重要.
为工业应用开发稳定的氧化演化反应 (OER) 电催化剂仍然是一个重大挑战.

研究的目的:

合成和评估一种新的FeCoNiMnCr高合金和高氧化物 (HEA-HEO) 异催化剂.
为了在苛刻的工业条件下证明催化剂的稳定性和氧化演化反应 (OER) 的效率.

主要方法:

通过Cr诱导的自发重建策略在现场合成HEA-HEO异种催化剂.
电化学测试以评估OER性能,包括超电位和长期稳定性.
密度函数理论 (DFT) 计算来研究异质催化剂的电子结构和稳定性.

主要成果:

这种HEA-HEO异种催化剂表现出极好的OER性能,在500 mA cm-2.2时具有320 mV的低超电位.
经过240小时100 mA cm-2.2下,证明了超稳定的性能,活动损失微不足道.
在6米KOH中在85°C和500mA cm−2下超过500小时保持出色的长期稳定性.

结论:

由Cr诱导的HEA-HEO异构结构为稳定的OER过程提供了强大的电活性位点.
这项工作提供了一个新的策略,用于设计高效和高度稳定的高电催化剂,用于工业水分.

关键词:

不同结构的异构结构.高合金是一种高合金.具有高的氧化物.长期稳定的长期稳定性氧气进化反应反应氧气进化反应

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