材料科学
悬空债券
光化学
紫外线
带隙
光催化
催化作用
光电子学
硅
化学
生物化学
作者
Bin Wang,Hailong Chen,Wei Zhang,Heyuan Liu,Zhaoke Zheng,Fangcheng Huang,Jinyuan Liu,Gaopeng Liu,Xiaoyun Yan,Yuxiang Weng,Huaming Li,Yuanbin She,Paul K. Chu,Jiexiang Xia
标识
DOI:10.1002/adma.202312676
摘要
Abstract Broad‐spectrum‐driven high‐performance artificial photosynthesis is quite challenging. Herein, atomically ultrathin bismuthene with semimetallic properties is designed and demonstrated for broad‐spectrum (ultraviolet‐visible‐near infrared light) (UV–vis–NIR)‐driven photocatalytic CO 2 hydrogenation. The trap states in the bandgap produced by edge dangling bonds prolong the lifetime of the photogenerated electrons from 90 ps in bulk Bi to 1650 ps in bismuthine, and excited‐state electrons are enriched at the edge of bismuthine. The edge dangling bonds of bismuthene as the active sites for adsorption/activation of CO 2 increase the hybridization ability of the Bi 6 p orbital and O 2 p orbital to significantly reduce the catalytic reaction energy barrier and promote the formation of C─H bonds until the generation of CH 4 . Under λ ≥ 400 nm and λ ≥ 550 nm irradiation, the utilization ratios of photogenerated electron reduction CO 2 hydrogenation to CO and CH 4 for bismuthene are 58.24 and 300.50 times higher than those of bulk Bi, respectively. Moreover, bismuthene can extend the CO 2 hydrogenation reaction to the near‐infrared region ( λ ≥ 700 nm). This pioneering work employs the single semimetal element as an artificial photosynthetic catalyst to produce a broad spectral response.
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