Abstract
Bioelectrocatalysis has become one of the most important research fields in electrochemistry and provided a firm base for the application of important technology in various bioelectrochemical devices, such as biosensors, biofuel cells, and biosupercapacitors. The understanding and technology of bioelectrocatalysis have greatly improved with the introduction of nanostructured electrode materials and protein-engineering methods over the last few decades. Recently, the electroenzymatic production of renewable energy resources and useful organic compounds (bioelectrosynthesis) has attracted worldwide attention. In this review, we summarize recent progress in the applications of enzymatic bioelectrocatalysis.
Highlights
Oxidoreductases catalyze redox reactions between two sets of redox substrate couples and are considered industrially useful catalysts due to their high activities and substrate specificities under mild conditions
Bioelectrocatalytic reactions are classified into two types according to the mode of the electron transfer described above: direct electron transfer (DET) and mediated electron transfer (MET), as shown in
We will describe several techniques for improving the performance of enzymatic bioelectrocatalytic systems and summarize recent studies on their applications
Summary
Oxidoreductases catalyze redox reactions between two sets of redox substrate couples and are considered industrially useful catalysts due to their high activities and substrate specificities under mild conditions (room temperature, normal pressure, and neutral pH). Redox polymers anchoring osmium complexes once both enzymes and mediators are stably immobilized on electrodes, the measurement systems work as [3,37,38,39,40,41,42,43,44,45], ferricyanide [46,47], metallocenes [48,49,50,51], and viologen units [52,53,54,55] are constructed as pseudo-DET-type systems [10,11,36]. Slow kinetics in heterogeneous electron transfer is compensated by the so-called overpotential of the electrode in the DET-type reaction and by the large driving force (that is, increased difference in the formal potential) between the enzyme and mediator. We will describe several techniques for improving the performance of enzymatic bioelectrocatalytic systems and summarize recent studies on their applications
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