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Batteries and Fuel Cells

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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...
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Chemical reactions require sufficient energy to cause the matter to collide with enough precision and force that old chemical bonds can be broken and new ones formed. In general, kinetic energy is the form of energy powering any type of matter in motion. Imagine a person building a brick wall. The energy it takes to lift and place one brick on top of another is the kinetic energy—the energy matter possesses because of its motion. Once the wall is in place, it stores potential energy.
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Thermodynamics of a Redox Reaction
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Updated: Jan 31, 2026

On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method
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Dynamic Vibration-Coupled Energy Transfer for Boosting ORR Catalysts in Fuel Cells.

Chenjia Liang1, Jun Yao1, Xiaoxia Hou1

  • 1Key Lab of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.

Journal of the American Chemical Society
|January 29, 2026
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A novel dynamic surface energy transfer method uses exothermic oxygen adsorption to drive endothermic desorption, enhancing oxygen reduction reaction (ORR) catalyst performance. This vibration-coupled energy transfer (VCET) approach significantly boosts fuel cell efficiency.

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Area of Science:

  • Heterogeneous catalysis
  • Surface science
  • Electrocatalysis
  • Energy conversion

Background:

  • Developing highly active catalysts is crucial for efficient energy conversion technologies like fuel cells.
  • Conventional catalyst design often faces limitations in managing surface energy dynamics.
  • The oxygen reduction reaction (ORR) is a key bottleneck in fuel cell performance.

Purpose of the Study:

  • To demonstrate a new method for producing highly active catalysts using dynamic surface energy transfer.
  • To investigate the mechanism of vibration-coupled energy transfer (VCET) for promoting endothermic desorption steps.
  • To enhance the performance of oxygen reduction reaction (ORR) catalysts.

Main Methods:

  • Anchoring flexible tert-butylsulfonylcalix[4]arene (tBuC[4]A) on Platinum-Cobalt (PtCo) nanoparticles to enable VCET.
  • Utilizing machine learning models and theoretical simulations to analyze energy transfer and desorption barriers.
  • Employing in situ FTIR and Raman spectroscopy, along with kinetic measurements, for mechanistic studies.

Main Results:

  • VCET was successfully implemented, weakening OH* binding and reducing desorption barriers by 51%.
  • Achieved 13.2% energy utilization efficiency through dynamic energy management.
  • Demonstrated significantly improved catalyst performance: 1.03 A mg_Pt^-1 mass activity and 2.07 W cm^-2 peak output power.

Conclusions:

  • The 'adsorption-spurring-desorption' mechanism via VCET effectively enhances ORR catalyst activity and fuel cell performance.
  • This dynamic energy management strategy surpasses conventional approaches for catalyst development.
  • The VCET mechanism provides a new blueprint for designing high-performance heterogeneous catalysts.