NiFe-LDH-Decorated Ti-Doped Hematite Photoanode for Enhancing Solar Water-Splitting Efficiency

Shouli Bai; Shiyu Jia; Yingying Zhao; Pinggui Tang; Yongjun Feng; Ruixian Luo; Dianqing Li; Aifan Chen

doi:10.1021/acs.inorgchem.3c01818

NiFe-LDH-Decorated Ti-Doped Hematite Photoanode for Enhancing Solar Water-Splitting Efficiency

Inorg Chem. 2023 Sep 18;62(37):15039-15049. doi: 10.1021/acs.inorgchem.3c01818. Epub 2023 Aug 31.

Authors

Shouli Bai¹, Shiyu Jia¹, Yingying Zhao¹, Pinggui Tang¹, Yongjun Feng¹, Ruixian Luo¹, Dianqing Li¹, Aifan Chen¹

Affiliation

¹ State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing 100029, China.

PMID: 37652045
DOI: 10.1021/acs.inorgchem.3c01818

Abstract

Ti-doped α-Fe₂O₃ nanorods were prepared by a facile hydrothermal method, followed by a NiFe-LDH catalyst that was electrodeposited on the doped α-Fe₂O₃ nanorods to structure an integrating photoanode Ti:Fe₂O₃/NiFe-LDH for improving solar PEC water-splitting efficiency. The structure and properties of electrode materials were characterized and the PEC properties of photoanodes were measured. The results show that the photocurrent density of the photoanode enhances 11.25 times at 1.23 V (vs RHE) and the IPCE value enhances 4.10 times at 420 nm compared with pristine α-Fe₂O₃. The enhancement is attributed to the separating of photogenerated electron-hole, the increase of carrier density, and the acceleration of the carrier transfer rate due to the dual action of doping and catalysis.