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调节FeP/CoP p-n异构连接的空间电荷,以促进氧气演变反应的发生

Shaqi Fu¹, Cheng Peng¹, Yuancong Luo¹

¹School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China.

Journal of colloid and interface science

|March 13, 2024

概括

在FeP/CoP-2D纳米板中构建p-n异构连接可以提高氧化演化反应 (OER) 的电催化剂性能. 这种表面重建优化了电子转移和活性位点,大大提高了催化活性.

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:

电催化剂的表面重建是通过调节空间电荷分布来增强活性的关键.
为氧化演化反应 (OER) 开发高效的电催化剂对于能量转化技术至关重要.

研究的目的:

为了构建p-n异构的FeP/CoP-2D八边形纳米板.
调查空间电荷分布调制对OER活动的影响.

主要方法:

合成FeP/CoP-2D纳米板的阴离子交换方法.
电化学测量以评估OER性能.
密度函数理论 (DFT) 计算以了解反应机制.

主要成果:

FeP/CoP-2D纳米板表现出极好的OER活性,需要247mV的超电位,电流密度为10mA cm−2.
实现了68mV dec-1的低Tafel斜率,表明有效的电荷传输.
DFT计算证实了增强的*OH吸附和优化OER的吉布斯自由能量.

结论:

这种p-n异质连接有效地加速了电子转移,并优化了OER的电子结构.
本研究提出了一种可行的策略,用于通过异质连接工程设计先进的电催化剂,以提高开放式反应器的性能.

关键词:

双金属协同效应的协同作用这是OER OER.空间充电效应的空间充电效应对于TMP来说,这是一个很好的选择.p-n 异质连接的异质连接

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相关概念视频

P-N junction

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...