Metal–organic frameworks for electrocatalysis

Electrochemical sensors and biosensors based on redox polymer/carbon nanotube modified electrodes: a review.

During the past decade, biofuel cells (BFCs) have emerged as an emerging technology on account of their ability to directly generate electricity from biologically renewable catalysts and fuels. Due to the boost in nanotechnology, significant advances have been accomplished in BFCs. Although it is still challenging to promote the performance of BFCs, adopting nanostructured materials for BFC construction has been extensively proposed as an effective and promising strategy to achieve high energy production. In this review, we presented the major novel nanostructured materials applied for BFCs and highlighted the breakthroughs in this field. Based on different natures of the bio-catalysts and electron transfer process at the bio-electrode surfaces, the fundamentals of BFC systems, including enzymatic biofuel cells (EBFCs) and microbial fuel cells (MFCs), have been elucidated. In particular, the principle of electrode materials design has been detailed in terms of enhancing electrical communications between biological catalysts and electrodes. Furthermore, we have provided the applications of BFCs and potential challenges of this technology.

Nanostructured material-based biofuel cells: recent advances and future prospects

Catalytic four-electron reduction of O2 to water is one of the most extensively studied electrochemical reactions due to O2 exceptional availability and high O2/H2O redox potential, which may in particular allow highly energetic reactions in fuel cells. To circumvent the use of expensive and inefficient Pt catalysts, multicopper oxidases (MCOs) have been envisioned because they provide efficient O2 reduction with almost no overpotential. MCOs have been used to elaborate enzymatic biofuel cells (EBFCs), a subclass of fuel cells in which enzymes replace the conventional catalysts. A glucose/O2 EBFC, with a glucose oxidizing anode and a O2 reducing MCO cathode, could become the in vivo source of electricity that would power sometimes in the future integrated medical devices. This review covers the challenges and advances in the electrochemistry of MCOs and their use in EBFCs with a particular emphasis on the last 6 years. First basic features of MCOs and EBFCs are presented. Clues provided by electrochemistr...

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O2 Reduction in Enzymatic Biofuel Cells

Carbon nanotube/enzyme biofuel cells

Electrooxidation of glyphosate herbicide at different DSA® compositions : pH, concentration and supporting electrolyte effect

The continuous increase in the search for alternative energy sources worldwide is pushing the demand for “clean” and efficient energy production processes. The concept of biofuel cell has been known since 1912 but only in 1964 that the first enzyme-based biofuel cell was described. Since then, this kind of device has been the target of many research teams worldwide. This device is an alternative to the fuel cells employing metal catalysts that is capable of converting chemical energy into electricity, with the advantage of using biological molecules as catalysts. This new technology offers several other advantages over traditional batteries, including the use of renewable and clean catalysts, reaction selectivity, fuel flexibility, and the ability to operate at milder temperature. Recent studies have demonstrated promising characteristics of these devices; however, despite the several advances in this area, some challenges still need to be faced. This manuscript aims to provide the reader with an overview of the state of the art in enzymatic biofuel cells by discussing the latest papers in this field and presenting an outlook for future research in this area.

S. Aquino Neto

Papers

Electrooxidation of glyphosate herbicide at different DSA® compositions : pH, concentration and supporting electrolyte effect

An Overview of Enzymatic Biofuel Cells

Development of nanostructured bioanodes containing dendrimers and dehydrogenases enzymes for application in ethanol biofuel cells.

Hybrid nanocatalysts containing enzymes and metallic nanoparticles for ethanol/O2 biofuel cell

Development of novel bioanodes for ethanol biofuel cell using PAMAM dendrimers as matrix for enzyme immobilization