{"id":1441,"date":"2026-02-16T15:10:20","date_gmt":"2026-02-16T14:10:20","guid":{"rendered":"https:\/\/thinkgreentechnologies.ch\/?p=1441"},"modified":"2026-02-16T15:29:50","modified_gmt":"2026-02-16T14:29:50","slug":"electric-fields-reverse-the-rules-of-water-chemistry","status":"publish","type":"post","link":"https:\/\/thinkgreentechnologies.ch\/en\/electric-fields-reverse-the-rules-of-water-chemistry\/","title":{"rendered":"Electric fields reverse the rules of water chemistry."},"content":{"rendered":"

Self-dissociation of water under strong electric fields: a paradigm shift for electrolysis and hydrogen.<\/h3>\n

Hydrogen is today one of the central energy carriers in the transition to low-emission systems. However, the actual efficiency of production processes\u2014particularly via electrolysis\u2014depends substantially on understanding the molecular phenomena that occur in water when it is subjected to intense electric fields. <\/p>\n

A recent study by the Max Planck Institute for Polymer Research and the University of Cambridge, published in the Journal of the American Chemical Society, provides new insights into the behavior of water under strong electric fields, typical of advanced electrochemical devices.<\/p>\n

The central topic is the self-dissociation of water, that is, the spontaneous process:<\/p>\n

H2O \u21cc H\u207a + OH\u207b<\/p>\n

Under standard conditions, this reaction is strongly disfavored both energetically (enthalpically) and entropically. But the picture changes radically in the presence of high electric fields. <\/p>\n

What happens to water under a strong electric field?<\/h2>\n

Through advanced molecular dynamics simulations, the researchers observed a counterintuitive mechanism:<\/p>\n

    \n
  1. The electric field induces strong molecular ordering.
    \nWater molecules align along the direction of the field, reducing the structural disorder of the system.<\/li>\n
  2. The formation of ions disrupts this ordered structure.
    \nWhen an H\u207a\/OH\u207b pair is generated, the enforced organization collapses locally.<\/li>\n
  3. The increase in entropy becomes the driver of the reaction.
    \nThe breakdown of order produces an entropic gain sufficient to offset the energetic cost of dissociation.<\/li>\n<\/ol>\n

    In other words, under a strong electric field, the process is no longer dominated by free energy in the classical sense, but by the entropic contribution associated with the destruction of a highly ordered configuration.<\/p>\n

    This represents a true paradigm shift compared to the traditional view of reactions in aqueous solutions.<\/p>\n

    Implications for pH and electrochemical systems<\/h2>\n

    One of the most significant aspects concerns the change in acidity. Simulations indicate that, in the presence of intense electric fields, water can experience a substantial decrease in pH\u2014from around 7 to values close to 3. <\/p>\n

    This phenomenon has direct implications for:<\/p>\n