光催化
材料科学
磷化物
化学工程
碳纳米纤维
催化作用
镍
钼
纳米颗粒
电子转移
碳纤维
过渡金属
纳米技术
光化学
化学
复合材料
碳纳米管
有机化学
冶金
工程类
复合数
作者
Shuaiqi Gong,Mengjie Hou,Yanli Niu,Xue Tian,Xuan Li,Mingze Xu,Chen Xu,Vonika Ka‐Man Au,Zuofeng Chen
标识
DOI:10.1016/j.cej.2021.131717
摘要
Photoreduction of CO2 to chemical fuels offers a promising strategy for managing the global carbon balance using renewable solar energy. However, the decisive process of oriented photogenerated electron delivery presents a considerable challenge. The performance of most transition metal compounds, as photocatalysts for CO2 reduction, is largely limited by their inherent stacked structure, poor conductivity, and fast recombination of photogenerated electron-hole pairs. Herein, we report the construction of porous nitrogen-doped carbon nanofibers (NCPF) with highly dispersed Ni and molybdenum phosphide nanoparticles ([email protected]PF) loaded for photocatalytic CO2 reduction. The porous carbon nanofibers with high conductivity and open ends can effectively promote charge/mass transfer and improve CO2 adsorption. The loaded Ni species exist at a highly dispersed state that are stabilized by formation of coordinating Ni-N bonds with N from pyrrolic nitrogen in NCPF. The incorporation of Ni and its electronic coupling with MoP can adjust the band structure of the resultant material and alter the transfer route of the photogenerated carriers. The [email protected]PF exhibits a CO product selectivity up to 98.95% with a rate of 953.33 μmol g−1h−1 under visible light irradiation, which is 9.37 times faster than that of Ni-free [email protected]PF. These findings provide new insights into photocatalytic CO2 reduction on cost-effective transition metal compounds through combined morphology, composition, and heterointerface engineering.
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