基于Ru的催化剂对HER和ORR具有较强的金属支相互作用,使其具有较高的烧结阻力
Xuzhuo Sun1, Baofan Wu1, Bo Li1
1College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, PR China. chenjing0504@haut.edu.cn.
Chemical communications (Cambridge, England)
|August 4, 2023
概括
这项研究开发了和联合的碳支持的纳米粒子 (RuBCN),用于增强催化. RuBCN在进化和氧减少反应中表现出卓越的稳定性和催化活性.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术 纳米技术
背景情况:
- 开发高效和稳定的电催化剂对于能源转换技术至关重要.
- 纳米粒子是有希望的催化剂,但在高温下遭受聚合和烧结.
- 联合兴奋剂策略可以增强金属支相互作用和催化剂稳定性.
研究的目的:
- 为了合成和表征和联合合的碳支持的纳米粒子 (RuBCN).
- 研究共兴奋剂对纳米粒子稳定性和催化性能的影响.
- 评估RuBCN.的演变反应 (HER) 和氧减少反应 (ORR) 活性.
主要方法:
- 简单的离子交换策略使用克洛索-[B12H12]2-和Ru(bpy) 32+作为前体.
- 纳米粒子大小,结构和组成的表征.
- 对 HER 和 ORR 的性能和稳定性的电化学测试.
主要成果:
- 成功构建了在B,N共碳支 (RuBCN) 上稳定到900°C的3nm以下Ru纳米粒子.
- 由于协同的B和N兴奋剂,RuBCN表现出强烈的金属支相互作用,增强了烧结阻力.
- RuBCN表现出很好的HER活性 (η10 = 20 mV) 和ORR活性 (E1/2 = 0.76 V),表现优于单一兴奋剂对应物.
- 由于B兴奋剂导致Ru中增强的电子缺乏,削弱了Ru-H和Ru-O2相互作用,提高了催化效率.
结论:
- B,N 协同兴奋剂是一种有效的策略,可以在碳支器上稳定小型纳米颗粒.
- 与单一兴奋剂材料相比,RuBCN对HER和ORR都表现出优越的电催化性能和稳定性.
- B和N联合兴奋剂的协同效应为设计先进的电催化剂提供了一个有希望的途径.
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