The Preparation Of Non-noble Metal Catalyst Based On Porous Graphene And Their Electrocatalysis Application

Porous reduced graphene oxide has the advantages that we can find in GR and it has more lager specific surface area due to the existence of numerous pores. The composite of metal oxide nanoparticles supported on pGR has attracted tremendous attention in electrochemical fields. In this work, we fabricated two novel porous graphene nanocomposite materials, and then researched their electrocatalytic application. The main contents of the dissertation are as follows:1. We have synthesized CuO/PrGO composite which has lager specific surface area and highly exposed CuO by a facile hydrothermal method and fabricated non-enzymatic glucose sensor based on the nanocomposite modified glassy carbon electrode ?GCE?. The CuO/PrGO nanocomposite showed an enhanced electrocatalytic activity to direct glucose oxidation compared with the non-porous reduced graphene ?CuO/rGO?. The CuO/PrGO modified glass carbon electrode ?CuO/PrGO-GCE? responded linearly to glucose in the range of 0.001 to 6 mM and the detection limit of the transducer was found to be 0.50 ?M. High reproducibility, wide linear range, good anti-interference, stability and enough precision in real sample analysis made it promising for the development of enzyme-free sensors.2. We have synthesized MoO₂-pGR composite which have considerable electrocatalytic ability for hydrogen evolution reaction by a rapid and simple pyrolysis of ammonium molybdate tetrahydrate, urea and pGR. As expected, MoO₂-pGR composites exhibit a high HER active with a low Tafel slope of 57.8 mV dec'1, a small onset potential ?Eonset? of-72.53 mV vs. RHE and an outstanding long-term stability. These results provide a new thought for the synthesis of MoO₂-PGR composites as an excellent HER catalysts.