Q about current article: On-demand Hydrogen Generation : ACS Nano Letters

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Discussion Overview

The discussion revolves around an article on on-demand hydrogen generation, specifically addressing the energy source for splitting water molecules without the use of light, heat, or electricity. Participants explore the chemical reactions involved and their implications.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Jeff questions the source of energy for splitting water molecules in the reaction described in the article, noting that it occurs without light, heat, or electricity.
  • Another participant presents a specific chemical reaction (2H2O + Si -> SiO2 + 2H2) that is exothermic, suggesting that the energy for the reaction may come from the formation of SiO2.
  • A different participant draws a comparison to using an Al/Ga alloy for similar hydrogen generation purposes, implying that there may be alternative methods or materials involved.
  • Jeff acknowledges a misunderstanding regarding the nature of the process, initially thinking it might involve catalysis.

Areas of Agreement / Disagreement

There is no clear consensus on the energy source for the reaction, and multiple viewpoints regarding the mechanisms of hydrogen generation are presented, indicating ongoing debate and exploration.

Contextual Notes

Participants have not fully explored the implications of the reactions mentioned, and there may be missing assumptions regarding the conditions under which these reactions occur.

pdxjjb
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Here is the abstract: http://pubs.acs.org/doi/abs/10.1021/nl304680w

I would need to pay the $35 so I have not read the full text.

Question: it says "...without Light, Heat, or Electricity." Where is the energy required to split the water molecules coming from?

Jeff
 
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2H2O +Si -> SiO2 +2H2

This reaction is very exothermic due to the high energy of formation of SiO2.
 
In a way it is not much different from using Al/Ga alloy for the same purpose.
 
Thank you both. I foolishly thought they might be claiming some kind of catalysis. I saw the error of my ways soon after posting.
 

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