一种可扩展的固态方法在ATO上合成纳米粒子,用于水分裂
Ebrahim Sadeghi1, Per Morgen1, Darko Makovec2
1Department of Green Technology, University of Southern Denmark, Odense M5230, Denmark.
ACS applied materials & interfaces
|February 24, 2025
概括
开发具有成本效益的 (Ir) 阳极催化剂用于质子交换膜水电解 (PEMWE) 是至关重要的. 本研究提出了一种简单,高效的方法,用于制造高活性的氧化 (ATO) 催化剂,用于氧化演化反应.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 质子交换膜水电解 (PEMWE) 需要高效且负担得起的阳极催化剂.
- 二氧化 (IrO2) 是一个关键的催化剂,但其高成本需要减少 (Ir) 负载.
- 导电支材料可以定Ir/IrO2,提高催化剂的效率.
研究的目的:
- 开发一种简单且时间效率高的合成协议,用于催化剂的氧化 (ATO).
- 为了研究低Ir负载的Ir/ATO催化剂的氧化演化反应 (OER) 性能.
- 通过具有成本效益的催化剂设计,提高PEMWE技术的商业可行性.
主要方法:
- 采用固态方法将金属 (Ir) 沉积在添加氧化 (ATO) 上.
- 用不同的条件准备了四个具有50 wt% Ir负载的催化剂样本,包括乙醇中的NaOH (Ir/ATO-NE).
- 使用OER测量和Tafel斜率分析来评估电化学性能. 材料的表征包括电子显微镜.
主要成果:
- 与商业的IrO2 (282 A gIr-1) 相比,Ir/ATO-NE催化剂表现出更高的特定OER性能 (340 A gIr-1在1.6V与RHE之间).
- 伊尔/ATO-NE显示了最低的塔菲尔斜率,表明增强的氧气演化动力学.
- 电子显微镜证实了统一的Ir纳米粒子大小和完整的NP覆盖在ATO支持的最佳样本.
结论:
- 建立了一个简单,高效和有效的合成协议,用于在酸性介质中用于氧气演变的ATO上的Ir催化剂.
- 开发的Ir/ATO-NE催化剂表现出高活性和耐久性,为商业的IrO2提供了一个有希望的替代品.
- 这种方法有助于降低负荷,有助于更具成本效益的PEMWE系统.
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