Manipulating photogenerated electron flow in nickel single‐atom catalysts for photocatalytic CO2 reduction into tunable syngas
Yida Zhang,
Qingyu Wang,
Lihui Wu,
Haibin Pan,
Chengyuan Liu,
Yue Lin,
Gongming Wang,
Xusheng Zheng
Affiliations
Yida Zhang
National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui China
Qingyu Wang
National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui China
Lihui Wu
National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui China
Haibin Pan
National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui China
Chengyuan Liu
National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui China
Yue Lin
Department of Chemistry, Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui China
Gongming Wang
College of Chemistry and Materials Science University of Science and Technology of China Hefei Anhui China
Xusheng Zheng
National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui China
Abstract The key to designing photocatalysts is to orient the migration of photogenerated electrons to the target active sites rather than dissipate at inert sites. Herein, we demonstrate that the doping of phosphorus (P) significantly enriches photogenerated electrons at Ni active sites and enhances the performance for CO2 reduction into syngas. During photocatalytic CO2 reduction, Ni single‐atom‐anchored P‐modulated carbon nitride showed an impressive syngas yield rate of 85 μmol gcat−1 h−1 and continuously adjustable CO/H2 ratios ranging from 5:1 to 1:2, which exceeded those of most of the reported carbon nitride‐based single‐atom catalysts. Mechanistic studies reveal that P doping improves the conductivity of catalysts, which promotes photogenerated electron transfer to the Ni active sites rather than dissipate randomly at low‐activity nonmetallic sites, facilitating the CO2‐to‐syngas photoreduction process.
