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半孔RE_0.5Ce_0.5O_2- 化物电催化剂用于氧气进化反应

Sreya Paladugu¹, Ibrahim Munkaila Abdullahi², Harish Singh²

¹Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.

ACS applied materials & interfaces

|February 3, 2024

概括

通过蒸发诱导自我组装 (EISA) 合成的高度多孔的稀土氧化物纳米催化剂显示出增强的氧化演化反应 (OER) 活性和稳定性. 这一突破可以避免在可持续能源应用中使用昂贵的过渡金属或贵金属.

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
纳米技术纳米技术

背景情况:

为氧化演化反应 (OER) 开发高效的电催化剂对于水电解和二氧化碳减排等可持续能源技术至关重要.
目前的OER催化剂通常依赖于昂贵的过渡金属或贵金属,限制了它们的广泛应用.
具有高表面积的高度多孔材料是可取的,以提高催化性能.

研究的目的:

使用蒸发诱导自组装 (EISA) 合成高度多孔的化物纳米催化剂.
调查稀土离子替代在CeO2中对增强OER活性和稳定性的作用.
为了证明一种无金属的方法来开发高性能OER电催化剂.

主要方法:

蒸发诱导自组装 (EISA) 用于合成多孔酸纳米催化剂.
在CeO2网格中,稀土离子替代 (50%为Ce).
在性介质中OER活性和稳定性的电化学表征.

主要成果:

稀土离子替代引入氧气空缺,降低OH*吸附能量并增强OER活性.
Nd2Ce2O7表现出最低的OER超电位 (243 mV在10 mA cm-2).
合成的Nd2Ce2O7在性条件下表现出极好的循环稳定性.

结论:

通过EISA合成的稀土氧化物纳米催化剂为传统的OER催化剂提供了一个有希望的替代品.
通过稀土替代引入氧气空缺的战略有效地提高了OER的性能.
这种无金属的方法为具有成本效益和可持续的OER电催化剂开发提供了途径.

关键词:

这是OER OER.电催化剂是一种电催化剂.化物是一种化物.它们是中孔状的.氧气空缺,高氧氧化物.稀土酸是一种稀土酸.

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