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多晶CoO-Bo混合体作为有效的电催化剂,用于解决水分裂中的动力学缓慢的阳极反应

Venkatachalam Ashok¹, Arunagiri Gayathri¹, Murugan Vijayarangan¹

¹Department of Chemistry, Material Science Lab, Annamalai University, Annamalai Nagar, Tamilnadu 608 002, India.

ACS applied materials & interfaces

|December 17, 2024

概括

一种新的氧化物/酸盐 (CoO-Bo) 混合催化剂有效地催化性介质中的氧演化反应 (OER). 这种缺陷丰富的催化剂提供了卓越的性能和稳定性,为先进的电催化剂开发铺平了道路.

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:

氧化演化反应 (OER) 对许多电化学能量转化系统至关重要.
在性电解质中开发高效稳定的OER电催化剂仍然是一个重大挑战.
氧化物是有前途的OER催化剂,但它们的性能可能受到内在性质的限制.

研究的目的:

为了合成和表征一种新的多晶氧化物/酸盐 (CoO-Bo) 混合催化剂.
评估CoO-Bo在性介质中的氧化演化反应 (OER) 的电催化性能.
调查OER期间的结构演变和活性物种形成.

主要方法:

同降水,然后用酸回火以合成CoO-Bo催化剂.
电化学表征包括循环电量计 (CV) 和旋转盘电极 (RDE) 在1M KOH的测量.
电解后表征分析催化剂表面重建和活性相形成.

主要成果:

与Co3O4和IrO2.2相比,CoO-Bo催化剂表现出明显增强的OER活性.
在271mV (GC支持) 和267mV (NF支持) 的低超电位下,达到10mA/cm2的电流密度.
在10 mA/cm2下,在150多小时内表现出强大的稳定性,并揭示了CoOOH活性相的形成.

结论:

CoO-Bo混合催化剂,具有缺陷丰富的格子和众多的粒度边界,是一种高效的OER电催化剂.
酸盐的结合调整了催化剂的形态和电子结构,提高了OER的性能.
这项工作为合成先进的多晶催化剂提供了新的策略,并提供了对OER机制的见解.

关键词:

这是OER OER.氧化物 / 酸盐氧化物 / 酸盐这是六角形的血小板.它是多晶体的.太阳能转化为气

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