Construction of n-type homogeneous to improve interfacial carrier transfer for enhanced photoelectrocatalytic hydrolysis

• Published in: Journal of colloid and interface science Vol. 658; pp. 258 - 266
• Main Authors: Dong, Yi-Wen, Zhai, Xue-Jun, Wu, Yang, Zhou, Ya-Nan, Li, Yi-Chuan, Nan, Jun, Wang, Shu-Tao, Chai, Yong-Ming, Dong, Bin
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 15.03.2024
• Subjects: Blackbody effect; Carrier diffusion; Energy level structure; n-n type heterojunction; Oxygen evolution reaction; Carrier diffusion; Oxygen evolution reaction; Blackbody effect; n-n type heterojunction; Energy level structure
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2023.12.080

[Display omitted] •FeBTC and CeBTC are compounded to form n-n heterojunction materials.•Interfacial carrier diffusion is enhanced by the formation of heterojunctions.•Blackbody effect enhances the intensity of light absorption by material.•CeBTC@FeBTC/NIF requires 300 mV to achieve 100 mA cm−2 under light.•CeBTC@FeBTC/NIF remains stable for at least 48 h at 200 mA cm−2 for OER. Photoelectrocatalyzed hydrogen production plays an important role in the path to carbon neutrality. The construction of heterojunctions provides an ideal example of an oxygen precipitation reaction. In this work, the performance of the n-n type heterojunction CeBTC@FeBTC/NIF in the photoelectronically coupled catalytic oxygen evolution reaction (OER) reaction is presented. The efficient transfer of carriers between components enhances the catalytic activity. Besides, the construction of heterojunctions optimizes the energy level structure and increases the absorption of light, and the microstructure forms holes with a blackbody effect that also enhances light absorption. Consequently, CeBTC@FeBTC/NIF has excellent photoelectric coupling catalytic properties and requires an overpotential of only 300 mV to drive a current density of 100 mA cm−2 under illumination. More importantly, the n-n heterojunction was found to be effective in enhancing charge and photogenerated electron migration by examining the carrier density of each component and carrier diffusion at the interface.