Abstract
A low-cost photocatalytic system using a nickel-mercaptoethanol complex (Ni-ME) with a polymeric structure and graphitic carbon nitride (g-C3N4) for a hydrogen evolution reaction in the presence of triethanolamine (TEOA) as a sacrificial agent has been studied. To the best of our knowledge, this is the first study on this topic. We have found that 0.44wt% Ni-ME/g-C3N4 system exhibits the highest photocatalytic performance with high stability. There is an induction period between the first H2 evolution and the main acceleration of the reaction. The crystalline Ni-ME on g-C3N4 was converted into an amorphous phase, which was a more stable and active Ni complex for the photocatalytic reaction. Ni-ME/g-C3N4 is easy to prepare and is economically effective for solar hydrogen evolution.
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