氧空位工程 BiOX 催化剂:在铁流电池中协同增强氧还原动力学和抑制演变
Chao Guo1, Yinping Liu2, Yang Zhou1
1State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, China.
Journal of colloid and interface science
|March 5, 2026
概括
具有氧空位 (OV) 的工程氧化 (BiOX) 催化剂显著提高了铁氧化还原流电池 (ICRFB) 的性能. 这一创新增强了氧化还原动力学,抑制了的演变,从而实现了高效的电网规模储能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 铁氧化还原流电池 (ICRFB) 对低成本的电网规模储能充满希望.
- 关键的挑战包括缓慢的Cr3+/Cr2+氧化还原动力学和阳极上的寄生演化反应 (HER),阻碍了实际应用.
- 开发高效的催化剂对于克服这些局限性至关重要.
研究的目的:
- 设计一种新型催化剂,增强Cr氧化还原动力学并抑制ICRFB中的HER.
- 为了研究氧气空缺 (OV) 和素元素在木氧化物 (BiOX) 中对催化活性的作用.
- 制造高性能电极以提高ICRFB的性能.
主要方法:
- 设计BiOX (X = Cl, Br, I) 催化剂,通过由素诱导的晶格扭曲来设计氧气空缺 (OV).
- 创建了一个不对称的Bi-O-Cr桥梁结构以加速电子传输.
- 在现场将富含OV的BIOX在多孔碳纤维上,以创建高性能电极.
主要成果:
- 富含OV的BIOX催化剂显示增强了Cr氧化还原激活,并抑制了HER.
- 使用OV丰富的BIOX修饰电极的ICRFB在140mA cm-2.2时实现了84.5%的能量效率.
- 在400个循环中观察到异常的循环稳定性.
结论:
- 在BIOX中的氧气空缺在协同增强Cr氧化还原活性和减轻寄生虫HER中发挥着多功能作用.
- 设计的OV丰富的BIOX催化剂有效地解决了ICRFB的关键局限性.
- 这项工作为高效的ICRFB和电网规模的能源存储提供了合理的催化剂设计的见解.
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