光照明的Redox处理Rh2P纳米颗粒在光阴极上用于在酸性环境中稳定生产气
Ji Hoon Choi1,2, Hak Hyeon Lee1, Sungho Jeon2
1School of Advanced Materials Science and Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419, Republic of Korea.
ACS applied materials & interfaces
|April 17, 2024
概括
这项研究引入了一种新的光照氧化还原沉积 (PRoD) 方法,用于在酸性条件下制造稳定,高效的光电化学 (PEC) 细胞,用于在酸性条件下生产绿色. 新的Rh2P催化剂显著提高了气生成性能.
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:
- 光电化学 (PEC) 电池为太阳能驱动的绿色生产提供了一个有前途的途径.
- 在酸性介质中提高生成效率和催化剂稳定性仍然是PEC细胞面临的挑战.
- 贵金属电催化剂在长时间的酸性暴露下经常降解,限制了长期的性能.
研究的目的:
- 开发一种稳定高效的光阴极,用于在酸性条件下生产绿色气.
- 为了解决酸性光电化学细胞中的催化剂降解问题.
- 研究一种用于强大的电催化剂的新型合成方法.
主要方法:
- 采用光照氧化还原沉积 (PRoD) 方法在TiO2上生长晶体Rh2P纳米粒子 (NP),而无需回火.
- 采用循环电量计与光照射,以精确控制反应和优化催化活性.
- 使用现场扫描传输电子显微镜 (STEM) 来实时观察NP增长的光阴极的特征.
主要成果:
- 通过Rh2P/TiO2/Al-ZnO/Cu2O/Sb-Cu2O/ITO光阴极在0 VRHE达到8.2 mA cm-2的光电流密度.
- 在强酸性溶液中证明了持久的水分性能.
- 与Rh-only催化剂相比,观察到Rh2P载荷光阴极的质量活性增加了5.3倍.
结论:
- 该PRoD方法可合成稳定和高度活跃的Rh2P纳米颗粒用于酸性PEC水分裂.
- 开发的光阴极显示了高效和持久的绿色生产的巨大潜力.
- 在现场STEM在PRoD过程中提供了对纳米粒子生长机制的宝贵见解.
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