短距离订制双元素杂的血酸盐光电极用于增强的光电化学水分裂
Yi-Ping Zhao1,2,3, Ling-Cong Zhang4,5, Hong Liu1,2
1National Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
快速的微波烧结通过控制原子级别的兴奋剂,优化了用于光电化学 (PEC) 水分裂的血光电极. 这增强了电荷重组抑制,并显著提高了PEC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
- 表面科学是一门学科.
背景情况:
- 血酸盐光电极对于光电化学 (PEC) 水分裂至关重要.
- 它们的性能受到微观结构和表面状态的限制,影响电荷重组.
研究的目的:
- 通过使用快速微波烧结,研究Sn和Ti对血光电极的原子级影响.
- 了解兴奋剂如何影响表面状态并提高PEC水分效率.
主要方法:
- 偏差校正传输电子显微镜 (AC-TEM) 用于原子尺度分析.
- 光电化学阻抗光谱 (PEIS),强度调制的光电流光谱 (IMPS),操作的短暂吸收光谱 (TAS).
- 密度函数理论 (DFT) 计算以建模电子结构和表面状态.
主要成果:
- 快速的微波烧结诱导了Sn和Ti在原子尺度上的短距离有序注.
- 兴奋剂显著调节了表面状态,抑制了电荷重组.
- 经过优化的血光电极实现了3.57 mA cm-2的光电流密度,在1.23 V与RHE相比,增长了4.2倍.
- 与NiFeOOH的合进一步提高了性能,达到3.96 mA cm−2的性能,并改变了启动电位.
结论:
- 短距离下令的Ti和Sn兴奋剂的原子级调节是提高血PEC性能的关键.
- 控制剂分布和表面状态对于高效的水分离至关重要.
- 这项研究强调了原子级控制在设计先进光电极材料中的重要性.
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