使用II型Cu2O/g-C3N4的光/电催化进化异构结构:密度函数理论解决了提高的电荷传输效率
Amir Mehtab1, Yuanbing Mao2, Saad M Alshehri3
1Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
Journal of colloid and interface science
|September 2, 2023
概括
这项研究引入了一种新的Cu2O/g-C3N4异构结构,用于高效的光催化和电催化水分解. 该材料展示了增强的演变反应 (HER) 和氧演变反应 (OER) 性能,为改进绿色生产铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 电触媒溶解是一种电触媒.
背景情况:
- 在p型和n型半导体之间的异质连接促进了电荷载体的转移,这对于光催化和电催化应用至关重要.
- 开发高效的双功能材料用于水分是可持续气生产的关键.
研究的目的:
- 为了合成和描述II型Cu2O/g-C3N4异构结构.
- 为了研究其在光催化和电催化水分的增强性能,以生产.
主要方法:
- 在Cu2O/g-C3N4异构结构的制造.
- 对演变反应 (HER) 和氧演变反应 (OER) 的电催化水分裂测量.
- 使用Triethanolamine作为牺牲剂进行光催化进化测量.
- 密度函数理论 (DFT) 计算以阐明电荷转移机制.
主要成果:
- 与原始g-C3N4.4g相比,Cu2O/g-C3N4异构表现出较低的HER (47 mVdec-1) 和OER (72 mVdec-1) 的过度潜力.
- 光催化演化速率显著提升至3492μmolgcat-1,几乎是g-C3N4.4的两倍.
- 实现了81%的法拉代效率和18%的表面量子收益率.
- DFT计算证实了从Cu2O到g-C3N4.4.的连锁电子转移.
结论:
- 类型II Cu2O/g-C3N4 异构结构在水分裂方面表现出卓越的双功能活性.
- 性能提升归因于活动位点增加和电荷转移阻力降低.
- 这项工作为高效的太阳能燃料生产提供了对异质连接工程的见解.
关键词:
) 2O/g-C) 3N) 4) 的情况.在 DFT 方面,它是最重要的.电触媒溶解是一种电触媒.异性结合 (heterojunction) 是一种异性结合.气发电是为了产生气.光催化作用的光催化更多相关视频
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