单原子PT兴奋剂诱导了NiO纳米片中的p型到n型过渡,转向自闭式调制的电催化进化反应
Yumin Da1,2, Zhangliu Tian2, Rui Jiang3
1Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China.
ACS nano
|September 7, 2023
概括
研究人员开发了一种新的电催化剂,在氧化纳米片上使用单个原子. 这种催化剂表现出增强的演化反应 (HER) 效率,这是由于独特的自我开关现象.
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:
- 具有可调节电子结构的高效单原子催化剂 (SAC) 对于先进的催化应用至关重要.
- 开发用于演化反应 (HER) 的有效电催化剂对于清洁能源技术至关重要.
研究的目的:
- 设计和研究一种新型的单原子催化剂,用于高效的演化反应 (HER).
- 探索由单个原子在超薄纳米片中诱导的自我封闭现象,以增强催化活性.
主要方法:
- 合成超薄的氧化 (NiO) 纳米片与原子分散的单个原子 (Pt SAs).
- 从p型NiO过渡到n型PtSA-NiO的电子结构的表征.
- 在性溶液中对HER的PtSA-NiO催化剂进行电化学评估.
主要成果:
- PtSA-NiO催化剂在超薄的纳米薄膜中表现出独特的自我封闭现象,创造了活跃和惰性的区域.
- "惰性"区域促进了高电荷载体度和超高电场,提高了导电性.
- 催化剂在10mA/cm2时达到55mV的低超电位,在性介质中具有良好的稳定性.
结论:
- 在超薄的NiO纳米板上支的Pt单个原子通过自闭机制创建一个高效的HER电催化剂.
- 开发的PtSA-NiO催化剂显示出在生产中应用的巨大潜力.
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