4.8 Article

Pressure Gradient Squeezing Hydrogen out of MnOOH: Thermodynamics and Electrochemistry

Journal

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 44, Pages 10893-10898

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c03382

Keywords

-

Funding

  1. National Natural Science Foundation of China (NSFC) [22022101, 21771011, 21875006]
  2. National Key Research and Development Program of China [2019YFA0708502]

Ask authors/readers for more resources

The pressure gradient between high-pressure region and ambient-pressure environment in a diamond anvil cell can drive decomposition/elimination reactions, pushing out hydrogen from compounds and leading to the concept of a pressure-gradient-driven battery. This study demonstrates that a pressure gradient is a special and powerful force to drive decomposition and electrochemical reactions.
Pressure of gigapascal (GPa) is a robust force for driving phase transitions and chemical reactions with negative volume change and is intensely used for promoting combination/addition reactions. Here, we find that the pressure gradient between the high-pressure region and the ambient-pressure environment in a diamond anvil cell is an even stronger force to drive decomposition/elimination reactions. A pressure difference of tens of GPa can push hydrogen out from its compounds in the high-pressure region to the environment. More importantly, in transition metal hydroxides such as MnOOH, the protons and electrons of hydrogen can even be separated via different conductors, pushed out by the high pressure, and recombine outside under ambient conditions, producing continuous current. A pressure-gradient-driven battery is hence proposed. Our investigation demonstrated that a pressure gradient is a special and powerful force to drive decomposition and electrochemical reactions.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available