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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled  that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc  with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one substance to...
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Water-Formation-Energy-Driven Electrochemical Process Modulation.

Ritwik Mondal1, Shyaam Srirangadhamu Yuvaraj1, Bhojkumar Nayak1

  • 1Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pune, 411008, India.

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Summary
This summary is machine-generated.

Harnessing water formation energy (WFE) through a novel electrochemical approach unlocks new possibilities for sustainable energy and chemical production. This method captures energy from water formation, driving reactions and enabling efficient purification and synthesis.

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Area of Science:

  • Electrochemistry
  • Energy Science
  • Green Chemistry

Background:

  • Water formation via H+/OH- recombination is typically considered electrochemically inert.
  • Significant global energy is lost in industrial neutralization processes.
  • Electrochemical perspective reveals untapped potential in water formation energy (WFE).

Purpose of the Study:

  • To explore the conceptual breakthroughs and experimental progress in understanding and implementing WFE.
  • To investigate the thermodynamic and kinetic factors governing WFE efficiency.
  • To showcase the multifunctional capabilities of WFE-driven electrochemical devices.

Main Methods:

  • Utilizing a hydrogen redox mechanism within a decoupled acid-alkali framework to capture WFE.
  • Developing galvanic and electrolytic devices for WFE energy capture.
  • Integrating temperature gradients to create galvanic-thermogalvanic hybrid devices.

Main Results:

  • Demonstrated spontaneous driving of thermodynamically uphill reactions under ambient conditions.
  • Enabled direct WFE capture as an electrical driving force, creating novel devices.
  • Showcased applications in desalination, hydrogen purification, isotopic water formation, and green chemistry.

Conclusions:

  • WFE, once overlooked, is a versatile and scalable thermodynamic platform.
  • Electrochemical capturing of WFE enhances efficiency and sustainability in electrochemical systems.
  • This approach establishes a new paradigm for next-generation electrochemical technologies.