Title

Hydrogen Production And Characterization Of Mlasrnb2Nio 9 (M = Na, Cs, H) Based Photocatalysts

Abstract

Novel photocatalysts MLaSrNb2NiO9 (M Na, Cs. H) were prepared for H2 evolution from an aqueous methanol solution under both UV and visible light ( > 420 nm) irradiation. CsLaSrNb 2NiO9 (CNO) with a 2D layered structure (similar to that of CsCa2Nb3O10) shows a much higher activity than the NaLaSrNb2NiO9 (NNO) photocatalyst that consists of a 3D cubic perovskite crystal structure (ABO3). Experimental results show that Cs ions in CNO can be replaced by protons using a 1.0 M HNO3 solution, forming a new photocatalyst, HLaSrNb 2NiO9 (HNO), whereas Na in NNO cannot be exchanged by H under the same conditions. Results show that partially exchanging Cs ions with protons significantly improves the photocatalytic activity of CNO-based photocatalyst. It is found that the higher activities of CNO and HNO compared with that of NNO are attributed to larger surface areas and the 2D layered structure. © 2009 American Chemical Society.

Publication Date

2-9-2010

Publication Title

Chemistry of Materials

Volume

22

Issue

3

Number of Pages

1107-1113

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/cm902137s

Socpus ID

76249092577 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/76249092577

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