调节了原子位的协调数和电子阴性,触发了高效的光催化水分裂
Yuqi Zhao1,2, Xi Wu2, Hengliang Wang3
1School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
Nano letters
|December 9, 2024
概括
这项研究开发了一种新的单原子催化剂 (SAC),用于高效的光催化演化反应. Co-P4/g-C3N4 异构结构显著提高了的生产速度和效率.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 可再生能源可再生能源是可再生能源.
背景情况:
- 优化单原子催化剂 (SAC) 是高效光催化演化反应 (HER) 的关键.
- 现有的催化剂往往在活动和稳定性方面面临限制.
研究的目的:
- 为了合成和表征一种新的Co-P4/g-C3N4异构结构,用于增强光催化HER.
- 为了研究由P-doping诱导的电子结构修改在Co-based SACs.
主要方法:
- 选择性化Co-金属-有机框架/石墨碳化物 (Co-MOF/g-C3N4) 以形成Co-P4地点.
- 异构结构的电子特性和催化性能的表征.
- 评估演变反应 (HER) 速率和明显量子效率 (AQE).
主要成果:
- Co-P4 / g-C3N4异构表现出高度电负的,协调不和的Co-P4配置.
- P-doping 转移了 d-band 中心,创造了富含电子的 Co 位点,并将 HER 自由能量屏障降低到 -0.08 eV.
- 实现了HER速率13.51 mmol g-1 h-1,显著超过贵金属催化剂的性能,在380 nm时AQE为28.45%.
结论:
- 在Co-P4/g-C3N4中,低协调数和高电子阴性金属位点的协同效应大大提高了光催化HER的性能.
- 这种P-doped SAC为开发用于清洁生产的先进电催化剂提供了有希望的途径.
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