稳定格子氧气演变与氧性Ce和活性Ni氧化物复合电催化剂,用于高效的阳离子交换膜水电解剂
Jeong In Jeon1, Seunghwan Jo2, Daehyun Kim1
1School of Materials Science and Engineering, Kookmin University, Seoul, 02707, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|May 5, 2025
概括
我们开发了一种基于和的新型电催化剂,用于氧化演化反应 (OER). 这种催化剂通过利用晶格氧介导机制 (LOM) 途径来提高效率.
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) 对于水的分裂至关重要.
- 网格氧介导机制 (LOM) 在过渡金属氧化物 (TMO) 中提供了比吸附物演化机制 (AEM) 更高的效率.
- LOM的激活取决于高价值过渡金属 (TMs) 的共价性.
研究的目的:
- 使用 (Ce) 微调 NiO 的 TM-O 结合状态.
- 开发一个CeO2/NiO异构结构,以提高OER性能.
- 通过增强的协同价值和电子转移,研究从AEM到LOM的转变.
主要方法:
- 一个阶段的Ce和Ni的电解.
- 形成CeO2/NiO异构的形成.
- 对OER性能进行电化学表征.
主要成果:
- CeO2/NiO异构结构促进了从AEM到LOM的转变.
- 在Ni和晶格氧之间增强的共价性促进了电子转移.
- 实现了低超电位 (160 mV) 和塔菲尔斜率 (32.68 mV dec-1).
- 在高电流密度 (1 A cm−2) 的情况下,在100小时内,在低电池电压 (1.84 V) 的情况下表现出稳定的性能.
结论:
- 氧性Ce和CeO2稳定了Ni的氧化状态,促进了LOM.
- CeO2/NiO异构表现出优越的LOM驱动的OER性能.
- 这项工作突出了设计高效OER电催化剂的策略.
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