Abstract
In case clean and renewable energy on earth is urgently needed, converting solar energy into hydrogen is applied. Due to its high efficiency and low cost, photoelectrochemical water splitting (PEC) has become a popular strategy. To achieve this, non-noble metal electrocatalysts as cocatalysts are used to enhance the performance of PEC water splitting. In this review, the recent procedure of the synthesis, performance measurements, and the result of MoSx, TiO2/NiOx, Pt/TiO2/InAs NWs, and CoS are introduced. These materials show a fit onset potential, good current density, and small charge transfer resistance for hydrogen evolution reaction (HER). Compared with TiO2/NiOx, Pt/TiO2/InAs NWs, and CoS, MoSx is the only stable under acidic conditions. Some suggestions for future research on transition metal-based electrocatalysts are also provided.
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