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在Bi/Bi₂O₃异质连接中进行原子尺度接口工程,用于选择性CO₂光还原到甲醇的异质连接

Wenna Guo¹, Yangyang Zhang¹, Jiaqi Tian¹

¹Henan Institute of Advanced Technology, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, PR China.

Nature communications

|December 17, 2025

概括

在高温 bismuth/bismuth 氧化物接口上的设计的欧米结增强了光催化 CO2 转化为甲醇的过程. 这一策略增强了电荷转移,并优化了催化站点,以实现高效的甲醇生产.

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.
摄影化学的使用.

背景情况:

有效地将二氧化碳 (CO2) 转化为甲醇 (CH3OH) 等有价值的化学物质,对于可持续的能源解决方案至关重要.
金属半导体异质连接为增强光催化提供了潜力,但往往遭受电荷重组和低效的界面电荷转移.

研究的目的:

在 (Bi) /氧化物 (Bi2O3) 接口上战略设计一个欧米结,以增强光催化CO2转化为甲醇的转化.
阐明欧米结调节电荷行为和界面能量以改善催化性能的机制.

主要方法:

使用局部表面等离子体共振效应制造一个Bi/Bi2O3 (BBO) 欧姆结.
使用理论计算 (例如,DFT) 和实验性表征来分析电荷转移动态和接口特性.
在光照照射下量化甲醇生产率.

主要成果:

工程设计的欧米接口促进了从Bi2O3到Bi的单向电子转移,通过内置的电场抑制了电荷重组.
接口Bi位点优先吸附和激活CO2,形成*COOH,随后在金属Bi位点发生质子化.
限制速度的*CO2 → *COOH步骤的激活能量减少了0.6 eV.
在光照照射下达到610μmol g-1的甲醇生产率.

结论:

欧姆结可以同时解决散装电荷传输的限制,并定制金属半导体光催化剂的表面催化活性.
Bi/Bi2O3 欧米结为开发高效的异质结光催化剂提供了通用设计范式,用于二氧化碳转化.

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