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Related Concept Videos

Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
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...
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...

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Membraneless Hydrogen Peroxide Fuel Cells as a Promising Clean Energy Source
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Published on: October 20, 2023

An efficient Ag-ionomer interface for hydroxide exchange membrane fuel cells.

Shuang Gu1, Wenchao Sheng, Rui Cai

  • 1Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521, USA.

Chemical Communications (Cambridge, England)
|September 29, 2012
PubMed
Summary

Researchers developed a novel precious-metal-free hybrid organic-inorganic perovskite solar cell (HEMFC). This new HEMFC demonstrates superior performance and cost-effectiveness compared to traditional platinum-based fuel cells.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Conversion

Background:

  • Hybrid organic-inorganic perovskite solar cells (HEMFCs) are promising for renewable energy.
  • Efficient interfaces are crucial for enhancing HEMFC performance, particularly oxygen reduction and mass transport.
  • The high cost of precious metal catalysts (like platinum) in conventional fuel cells limits widespread adoption.

Purpose of the Study:

  • To discover and characterize an efficient interface for HEMFCs.
  • To fabricate a completely precious-metal-free HEMFC.
  • To evaluate the cost-normalized power output of the fabricated HEMFC against a platinum-based benchmark.

Main Methods:

  • Development of an efficient silver-phosphonium ionomer interface within HEMFCs.
  • Fabrication of a novel, completely precious-metal-free HEMFC.
  • Performance testing and comparative analysis against a platinum-based proton exchange membrane fuel cell (PEMFC).

Main Results:

  • An efficient Ag-phosphonium ionomer interface was successfully achieved.
  • This interface simultaneously enhanced oxygen reduction reactions and improved mass transport.
  • The fabricated precious-metal-free HEMFC exhibited a significantly higher cost-normalized power output (117 W US$(-1)) compared to the Pt-based PEMFC benchmark (7.7 W US$(-1)).

Conclusions:

  • The Ag-phosphonium ionomer interface is key to improving HEMFC performance.
  • A cost-effective, precious-metal-free HEMFC has been successfully fabricated.
  • This technology offers a superior cost-performance ratio, paving the way for more economical fuel cell applications.