Oxygen transport through laccase biocathodes for a membrane-less glucose/O2 biofuel cell

Enhanced direct electron transfer between laccase and hierarchical carbon microfibers/carbon nanotubes composite electrodes. Comparison of three enzyme immobilization methods

“…On the other hand, the maximum oxygen concentration is approximately 200 µM and depends on the specific tissue diffusion coefficient [5]. As a consequence, the efficiency of a biocathode can be improved by addressing an optimized electrocatalytic reduction of oxygen at the electrode surface via electrode-enzyme direct electron transfer [6,7] and by securing a maximum oxygen supply [3]. Implementation of hierarchical carbon materials on micro-and nanoelectrodes' surface can multiply both the efficient diffusion profile of oxygen and the biocatalyst packing.…”

“…In the present context of biofuel cell development intensive efforts are gathered [1,2] towards fulfilling of key limiting parameters [3], not only in terms of current densities and extended cell potential, but also regarding the adaptation to physiological conditions [4]. From an implantable biocathode point of view that catalyzes the oxygen reduction to water, the maximum output that can be feasibly obtained is limited by both the oxygen concentration and the potential provided by the biocathode.…”

A simple biofuel cell cathode with human red blood cells as electrocatalysts for oxygen reduction reaction

“…glucose as the fuel and enzymes as the electrocatalysts, can be utilized at the electrode (Halámková et al, 2012;Zebda et al, 2009;Nazaruk et al, 2008;Togo et al, 2008). Various kinds of enzyme proteins, such as families of dehydrogenases, oxidases, peroxidases, etc., have been examined as the electrocatalysts both of the anode and the cathode, thus, the fuel cell reaction proceeds via a wide variety of the chemical reaction and the electron transfer process at the electrode in the field of BFCs (Rasmussen et al, 2012;Prakash et al, 2009;Drobov et al, 2008;Brunel et al, 2007;Kamitaka et al, 2007;Ikeda and Kano, 2003;Tsujimura et al, 2001;Katz et al, 1999;Gorton et al 1999;Palmore et al, 1998).…”

Stretchable Biofuel Cells with Silver Nanowiring on a Polydimethylsiloxane Substrate

“…This is because they work under mild conditions (room temperature, neutral pH and atmospheric pressure), which make them amenable to use in the human body [1][2][3][4][5][6][7][8][9][10][11][12]. However, when these devices are used in the human body, the flexibility and stretchability of biofuel cells are among their most important features.…”