Layered double hydroxides for H2 generation by the photoreforming of organic compounds

IF 5.2 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today Pub Date : 2024-12-19 DOI:10.1016/j.cattod.2024.115168

Sandra Yurani Toledo Camacho , Francisco Mediana Cabello , Sandra Contreras Iglesias , Philip R. Davies , David J. Morgan , Auttaphon Chachvalvutikul

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引用次数: 0

Abstract

Layered Double-Hydroxides (LDH) materials are promising catalysts for solar-driven reactions thanks to their two-dimensional and the tunability of their composition. The preparation of three bimetallic NiFe-, NiCo- and ZnAl-LDH for H₂ production by the photoreforming of glycerol under UV and visible irradiation has been investigated. Different modifications were studied: calcination, thermal reduction, plus Pt loading and TiO₂ doping. Samples exhibited typical features of LDHs in XRD and hexagonal crystallites and the presence of some satellite bands were observed by HAADF-STEM and XPS, respectively, though only thermal treatments modified partially or completely the LDH structure. NiCo- and ZnAl-LDH have the weakest and the most stable LDH structures, respectively. Finally, on the unmodified NiFe- and NiCo-, and ZnAl-LDH materials, photoactivity showed zero activity toward H₂ production, most likely due to their narrow and wide band gap (BG), respectively, but further thermal modifications, plus the incorporation of co-catalysts such as Pt and TiO₂, promoted photocatalytic activity. On the LDH containing TiO_2, the modifications had variable effect, for instance, Pt photodeposition significantly enhanced activity on ZnAl-LDH, but not on NiFe-LDH.

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来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.