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Sistemas Bioeletroquímicos: Célula Eletrolítica Microbiana para a Produção de Hidrogênio

2023; Brazilian Society of Chemistry; Volume: 16; Issue: 1 Linguagem: Inglês

10.21577/1984-6835.20230055

1984-6835

Alex Soares Castro, Valéria Reginatto, Adalgisa Rodrigues de Andrade,

Electrocatalysts for Energy Conversion

Systems that utilize the ability of microorganisms to receive or produce electrical current are known as bioelectrochemical systems (BES).In this review, the microbial electrolysis cell (MEC) will be addressed as an alternative for the sustainable and renewable production of hydrogen (H 2 ).With varied applications, MEC can generate H 2 from low-cost organic substrates, using residues.In a MEC, microorganisms are used as biocatalysts at the anode to oxidize, usually residual organic matter resulting in CO 2 , protons, and electrons.Electrons go through an external circuit, while protons traverse a semipermeable membrane.Both are transported to the cathode where electrons reduce the protons, resulting in H 2 .Technological advances in recent decades have led to an improvement in H 2 production yields in MEC.This article presents a didactic view of MEC, introducing definitions, theoretical concepts, and critical factors, such as the development of new cathodes, the form of capture and detection of hydrogen, and experimental conditions of microorganisms, which affect the performance of a MEC.