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Issue 24, 2013
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Efficient photo-driven hydrogen evolution by binuclear nickel catalysts of different coordination in noble-metal-free systems

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Abstract

Exploration of the complex Ni2(MBD)4 (MBD = 2-mercaptobenzimidazole) (C1) having different coordinated Ni atoms as a photocatalyst for hydrogen evolution is made. For comparison, the bimetallic Ni2(MBT)4 (MBT = 2-mercaptobenthiazole) (C2) complex with the same coordinated Ni atoms was synthesized. Both of the complexes have been successfully constructed for photo-induced hydrogen production using organic dyes as photosensitizers and triethanolamine (TEOA) as the effective electron donor by visible light (>400 nm) in acetonitrile–water solution. The time-dependence of H2 generation and DFT computational studies demonstrate that the complex C1 is more active than C2 for H2 evolution. The mechanisms of photocatalytic hydrogen generation for C1 and C2 involve different protonation sites resulting from the differences between the two structures.

Graphical abstract: Efficient photo-driven hydrogen evolution by binuclear nickel catalysts of different coordination in noble-metal-free systems

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Publication details

The article was received on 15 Jan 2013, accepted on 19 Mar 2013 and first published on 21 Mar 2013


Article type: Paper
DOI: 10.1039/C3DT50140J
Citation: Dalton Trans., 2013,42, 8684-8691
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    Efficient photo-driven hydrogen evolution by binuclear nickel catalysts of different coordination in noble-metal-free systems

    H. Cui, J. Wang, M. Hu, C. Ma, H. Wen, X. Song and C. Chen, Dalton Trans., 2013, 42, 8684
    DOI: 10.1039/C3DT50140J

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