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电化学试点H₂O₂ 通过固态电解质反应器生产:来自混合催化剂的洞察力为2电子氧降低反应的混合催化剂

Shengjian Lin^1,2, Jun Wang^1,3, Junxiang Chen^1,3

¹State Key Laboratory of Structural Chemistry, and Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P.R. China.

Angewandte Chemie (International ed. in English)

|March 4, 2025

概括

这项研究介绍了一种新的混合电催化剂,用于通过氧降解反应 (ORR) 通过可持续的过氧化 (H2O2) 合成. 开发的固态反应堆实现了高生产率和纯度,为传统方法提供了具有成本效益的替代方案.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
可持续化学可持续化学

背景情况:

传统的过氧化 (H2O2) 合成的 antraquinone 工艺在可扩展性和成本效益方面面临挑战.
电化学氧降解反应 (ORR) 是一种可持续的替代方案,但需要高效的电催化剂和反应器.
开发高纯度的H2O2生产方法对于各种工业应用至关重要.

研究的目的:

开发一种可扩展且具有成本效益的用于H2O2合成的电催化剂.
设计一台高效的固态反应堆,用于连续生产H2O2.
用混合材料研究ORR催化机制.

主要方法:

使用氧化碳纳米管和分层双氧化物 (LDHs) 的机械混合方法制造混合电催化剂.
电化学表征包括法拉戴效率和超电位测量在固体电解质电池中.
在现场分析和理论计算以了解催化机制.
使用阴离子交换树脂 (CER) 的固体反应堆的设计和测试.

主要成果:

混合电催化剂实现了近乎完美的法拉代效率 (∼100%) 和低超电位.
发现LDH联合催化剂在接口上微调局部pH值,增强活性和选择性.
固态反应堆的生产率为5.29 mmol cm−2 h−1 和11.8% H2O2 度.
一个扩展到工业尺寸的试验反应堆在15A时实现了大约127.0mmolh-1的生产率.

结论:

一个简单的,低成本的混合电催化剂和固态反应器系统可实现高效和可持续的H2O2生产.
这些发现代表了工业规模电化学H2O2合成的重大进展.
机械混合方法为制造先进的电催化剂提供了一个可扩展的方法.

关键词:

H2O2 电合成 H2O2 电合成大规模的无膜反应堆.NiFeW LDH 的使用方法这就是OCNTs.固体电解质是一种固体电解质.

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