Dopamine (DA) is an important catecholamine neurotransmitter in the mammalian central nervous system that influences several physiological functions. The impact of DA levels within the human body significantly affects the body functions. Maintaining DA level is essential and the electrochemical detection methods are often used to detect the DA level to regulate the body function. In this review, graphene (functionalized graphene and N-doped graphene) and its composites (metal, metal oxide, polymer, carbonaceous materials, clay, zeolite, and metal-organic framework based graphene composites) modified electrodes with their improved sensing performance towards DA along with several interfering species are described. Further, recent developments on the fabrication of various graphene based composite modified electrodes are also presented. Some important strategies to improve the selectivity and sensitivity towards DA with graphene based composite modified electrodes are also described.

This review describes recent advances in two-dimensional MoS2 nanosheets and their composite materials for understanding their high-electrocatalytic performance in HER and ORR.

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This review aims at providing an overview of the interactions between Pt and supports from experimental and theoretical results, in the hope of correlating the metal–support interactions with the activity and durability of the catalysts in fuel cells.