电催化活性和表面氧化物重建双金属铁 - 纳米碳化物电催化剂的氧化物演化反应
Amanda J Ritz1, Isabella A Bertini1, Edward T Nguyen1
1Department of Chemistry & Biochemistry, Florida State University Tallahassee Florida 32306 USA rlazenby@fsu.edu.
RSC advances
|November 29, 2023
概括
开发高效的氧化演化反应 (OER) 电催化剂是可再生能源的关键. 这项研究表明FeCo纳米碳化物.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 高效的氧化演化反应 (OER) 电催化剂对于可再生能源技术至关重要.
- 过渡金属碳化物 (TMC) 作为OER预催化剂表现有前途,但调双金属性能需要进一步研究.
- 了解在电化学条件下的催化剂转换至关重要.
研究的目的:
- 为了研究双金属FeCo纳米碳化物用于增强OER电催化活性的可调节材料特性.
- 了解铁 (Fe) 组成对FeCo纳米碳化物性能的影响.
- 探索表面重建在电催化活动中的作用.
主要方法:
- 合成具有不同Fe比例的双金属FeCo纳米碳化物.
- 在性条件下对OER活性进行电化学评估.
- 在催化过程中分析结构阶段和电子状态的变化.
主要成果:
- 开放式电源活性显示出对Fe含量的非线性依赖,在15-20%Fe (0.42V超电位) 时的最佳性能.
- 在水氧化过程中观察到表面重建到氧化阶段,特别是 (Fe$_{2}$Co$_{1-2}$) O$_{4}$.
- 这种氧化阶段的快速增长与电催化活性降低相关.
结论:
- FeCo纳米碳化物的OER性能可以通过Fe的加入来调整.
- 表面重建到氧化物显著影响长期的电催化活性.
- 控制或抑制氧化物生长是优化基媒介中碳化物性能的关键.
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