论文成果

发布时间：

2026-08-03

DOI码：

10.1016/j.apcatb.2026.127298

论文名称：

Synergistic Zn, O dual-vacancy and cobalt-nanoparticle engineering on ZnO for efficient photocatalytic CO2 reduction

发表刊物：

Applied Catalysis B: Environment and Energy

摘要：

Achieving efficient and selective photocatalytic reduction of CO2 to CO remains a great challenge, primarily due to inefficient charge utilization and intense competition from the hydrogen evolution. Herein, a synergistic strategy that, integrates Zn, O dual vacancies and Co nanoparticles on a ZnO support, is developed to address this challenge. Under visible-light irradiation, the photosensitized system achieves a CO production rate of 7.27 mmol g-1 h-1 with 78% selectivity, a 40-fold enhancement over ZnO. Mechanistic studies reveal a synergistic interplay between the dual vacancy defects and Co nanoparticles. The Zn, O dual vacancies modulate the electronic structure of adjacent Co sites to favor CO2 reduction over hydrogen evolution while the Co sites act as efficient catalytic centers for CO generation. Crucially, the integration of high-concentration dual vacancies and Co nanoparticles creates a strongly coupled electronic interface. This interfacial coupling enables the high-concentration dual vacancies to modulate the electronic structure of adjacent Co sites by downshifting the d-band center and creating a strongly coupled electronic interface, thereby enhancing CO2 adsorption, lowering the *COOH formation barrier, and accelerating electron transfer from the photosensitizer. This work demonstrates that the integration of high-concentration dual vacancy defects and active metal sites can concurrently address the critical challenges of selectivity and activity in photocatalytic CO2 reduction, providing an approach for developing high-performance ZnO-based photocatalysts for solar fuel production.

通讯作者：

Mengyuan Zhu, Lingfei Si, Jinwen Shi,* Yage Liu, Binjiang Zhai, Yanbing Liu, Fangbo Yu, Ya Liu, Liejin Guo*

卷号：

401

页面范围：

127298

是否译文：

否

发表时间：

2026-08-02