含有Cu (II) -和Cu (I) -水化合物的氧化多甲:在中性pH下进行电催化水分裂的双功能催化剂
Athira Ravi1, Sateesh Mulkapuri1, Samar K Das1
1School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India.
Inorganic chemistry
|May 26, 2023
概括
一种新型的化聚氧甲酸盐 (POM) 材料在中性pH下作为氧化演化 (OER) 和演化 (HER) 反应的双功能电催化剂. 这种基于POM的催化剂在没有重建的情况下证明了高效的氧化和减少水.
科学领域:
- 无机化学 无机化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 开发高效的电催化剂用于水分离对于可再生能源技术至关重要.
- 聚氧甲酸盐 (POMs) 具有可调节的结构和氧化还原特性,使其成为有前途的催化材料.
- 能够在中性pH下进行氧进化反应 (OER) 和进化反应 (HER) 的双功能催化剂是非常可取的.
研究的目的:
- 合成和结构性表征一种基于氧化多氧甲 (POM) 离子和混合价值铜的新型无机框架材料.
- 在中性pH下研究合成材料的OER和HER两种OER和HER的双功能电催化活性.
- 确定负责HER和OER的活性位点,并评估催化剂的稳定性.
主要方法:
- 合成和单晶X射线衍射用于无机框架材料的结构特征.
- 谱分析 (例如,IR,拉曼,UV-Vis) 来确认功能组和客分子的存在.
- 电化学测量,包括循环电压测量和时测量,以评估在中性pH下OER和HER的性能.
主要成果:
- 一种新型的氧化POM材料[Li(H2O) 4][{CuI(H2O) 1.5} {CuII(H2O) 3}2{WVI12O36OH) 6}·N2·H2S·3H2 (O1) 已成功合成和表征.
- 化合物1在中性pH下表现出OER (水氧化) 和HER (水还原) 的双功能电催化活性.
- 氧化POM离子和铜-水复合被确定为HER和OER的活性位点,分别具有较低的超电位和良好的法拉第效率.
结论:
- 合成的基于POM的材料是一种真正的双功能电催化剂,在中性pH下用于HER和OER.
- 催化剂在电化学反应期间不经过重建而有效运行,表明其高稳定性.
- 这项工作突出了功能化的POM作为水分裂应用的强大和高效的电催化剂的潜力.
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