Pyrochlore-structural Nd2Ta2O5N2 photocatalyst with an absorption edge of over 600 nm for Z-scheme overall water splitting

Hai Zou; Yu Qi; Shiwen Du; Lifang Liu; Xueshang Xin; Yunfeng Bao; Shuowen Wang; Zhaochi Feng; Fuxiang Zhang

doi:10.1039/d2cc02903k

Pyrochlore-structural Nd₂Ta₂O₅N₂ photocatalyst with an absorption edge of over 600 nm for Z-scheme overall water splitting

Chem Commun (Camb). 2022 Sep 22;58(76):10719-10722. doi: 10.1039/d2cc02903k.

Authors

Hai Zou^{1

2}, Yu Qi¹, Shiwen Du¹, Lifang Liu^{1

2}, Xueshang Xin^{1

2}, Yunfeng Bao¹, Shuowen Wang¹, Zhaochi Feng¹, Fuxiang Zhang¹

Affiliations

¹ State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China. fxzhang@dicp.ac.cn.
² University of Chinese Academy of Sciences, Beijing 100049, China.

PMID: 36069355
DOI: 10.1039/d2cc02903k

Abstract

A pyrochlore-structural oxynitride Nd₂Ta₂O₅N₂ with a visible light absorption edge of ca. 620 nm was explored for photocatalytic water splitting. Dual functions of Nd₂Ta₂O₅N₂ were confirmed by proton reduction and water oxidation half-reactions through separately loading Pt or CoO_x as a cocatalyst in the presence of the corresponding sacrificial reagent. Finally, the platinum modified sample (Pt/Nd₂Ta₂O₅N₂) was prepared and employed as the H₂-evolving photocatalyst to fabricate an effective photocatalytic Z-scheme overall water splitting together with PtO_x/WO₃ as the O₂-evolving photocatalyst and IO₃^-/I^- as shuttle ions under visible light irradiation.