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Related Concept Videos

Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
Microbial Fuel Cells01:23

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
Green Algae01:21

Green Algae

Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
Unrenewable Cells00:50

Unrenewable Cells

In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...
Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

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Extending the Lifespan of Soluble Lead Flow Batteries with a Sodium Acetate Additive
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Extending the Lifespan of Soluble Lead Flow Batteries with a Sodium Acetate Additive

Published on: January 7, 2019

Extended lifetime biofuel cells.

Michael J Moehlenbrock1, Shelley D Minteer

  • 1Department of Chemistry, Saint Louis University, 3501 Laclede Avenue, St. Louis, MO 63103, USA.

Chemical Society Reviews
|May 24, 2008
PubMed
Summary
This summary is machine-generated.

Enzymatic biofuel cells now have longer active lifetimes, enabling commercial use. Recent advancements focus on stabilizing enzymes for improved bioanode and biocathode performance in various fuel systems.

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Area of Science:

  • Biotechnology
  • Electrochemistry
  • Renewable Energy

Background:

  • Enzymatic biofuel cells (EBFCs) have been researched for 40 years.
  • Historically, short enzyme active lifetimes (8 hours to 7 days) limited commercialization.
  • Recent breakthroughs have significantly extended EBFC operational stability.

Purpose of the Study:

  • To introduce enzymatic biofuel cells.
  • To review recent advancements in enzyme stabilization and immobilization.
  • To cover diverse fuel systems and electron transfer mechanisms.

Main Methods:

  • Review of literature on enzyme stabilization techniques.
  • Analysis of immobilization strategies for bioanodes and biocathodes.
  • Examination of direct electron transfer (DET) and mediated electron transfer (MET) systems.

Main Results:

  • Significant improvements in enzyme active lifetimes achieved in the last five years.
  • Successful stabilization and immobilization of enzymes at bioanodes and biocathodes.
  • Demonstrated viability across various fuel sources like sugars and alcohols.

Conclusions:

  • Extended active lifetimes overcome previous commercialization barriers for EBFCs.
  • Enzyme stabilization and immobilization are key to high-performance EBFCs.
  • EBFC technology is poised for broader application in renewable energy.