化碳支持高活性演化反应的Rh和Ru电催化剂
Yuanxin Cao1, Xiaoming Yu1, Tianfu Wang1
1School of Chemical Engineering and Technology, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Sun Yat-sen University, Zhuhai, 519082, P. R. China.
我们为演化反应 (HER) 开发了高效的化碳 (ZTC) 支持的 (Ru) 和 (Rh) 电催化剂. 与商业/碳 (Pt/C) 相比,RhRu/ZTC催化剂表现出优越的性能和稳定性.
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:
- 开发用于演化反应 (HER) 的高效电催化剂对于清洁能源技术至关重要.
- 现有的催化剂,如/碳 (Pt/C) 是昂贵的,并面临稳定性挑战.
- 石模板碳 (ZTCs) 为催化剂支持提供独特的多孔结构.
研究的目的:
- 为了系统地合成和评估化碳 (ZTC) 支持的 (Ru) 和 (Rh) 基于HER的电催化剂.
- 为了比较这些新型催化剂的性能与商业Pt/C.
- 调查来自不同热石 (A或ZSM-5) 和金属组成的ZTC支对催化活性和稳定性的影响.
主要方法:
- 合成ZTC的支持使用焦化A或ZSM-5模板.
- 在ZTC支上浸Ru和Rh金属前体.
- 制备单金属和双金属电催化剂配方.
- 用循环电压测量等技术对 HER 性能的电催化剂进行电化学表征.
主要成果:
- 所有合成的ZTC支持的Ru和Rh电催化剂都超过了HER的商业Pt/C.
- 该RhRu/(ZTC/ZSM5) 催化剂表现出了卓越的性能,在10 mA·cm−2.2.5时的超电位为24.8 mV.
- 这种催化剂也表现出了显著的稳定性,在20,000个循环电压测量周期后,只有1mV的电位下降.
结论:
- 石模板碳是开发高性能HER电催化剂的有效支持.
- 该RhRu/(ZTC/ZSM5) 催化剂代表了一个有希望的替代商业Pt/C用于生产.
- 一种简单的浸方法可以为进化反应产生高度活性和稳定的电催化剂.
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