碳氧化六角酸/石墨烯配置用于高度中性过氧化的电合成
Zhixin Song1, Xiao Chi2, Shu Dong1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China.
Angewandte Chemie (International ed. in English)
|December 30, 2023
概括
这项研究介绍了一种新型的碳氧化六角化/石墨烯催化剂,用于高效的过氧化 (H2O2) 电合成. 催化剂具有很高的选择性和生产率,为传统方法提供可持续的替代方案.
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
- 催化剂是一种催化剂.
背景情况:
- 传统的过氧化 (H2O2) 生产的 antraquinone 工艺是能源密集的.
- 开发低成本,高活性和选择性的H2O2电合成催化剂对于工业应用至关重要.
- 在工业相关的电流密度下长期生产H2O2仍然存在挑战,特别是在中性电解质中.
研究的目的:
- 为高效的两电子 (2e−) 氧降解反应 (ORR) 构建一种新型催化剂,以产生H2O2.2.
- 为了实现H2O2电合成的高选择性,生产率和长期稳定性.
- 研究合成的H2O2.2.的催化机制和实际应用.
主要方法:
- 在商用活性炭上制造碳氧化六角化/石墨烯 (h-BN/G) 异构连接.
- 使用了B,N共和表面氧组功能化.
- 在现场使用拉曼光谱和理论计算来研究反应机制.
主要成果:
- 冠军催化剂在2e− ORR方面实现了>95%的选择性,Faradaic效率 (FE) >95%.
- 证明了高的H2O2生产率,高达13.4molg-1h-1.
- 在高电流密度为100 mA cm−2时达到2.1 wt%的累积H2O2度,具有出色的长期稳定性.
- 碳氧化h-BN/G结构促进了O2吸附和中间稳定,降低了HOOH*释放的能量屏障.
结论:
- 开发的碳氧化h-BN/G催化剂对2e-ORR非常有效,可实现高效和稳定的H2O2电合成.
- 催化剂设计促进了关键反应步骤,从而提高了性能.
- 电化学合成的H2O2在实际应用中表现有希望,例如快速降解染料.
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