The effect of organic molecules adsorption on hydrogen absorption in relation to the hydrogen evolution reaction
The competitive adsorption of organic molecules (2,7-naphthalenedisulfonic acid) and adsorbed His of interest in relation to its influence on H absorption into a Pd-Ni electrodeposited alloy. The experimental results, in acid solution, show an enhancement of the coverage of the electrode su...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2001-01-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2001/0352-51390112799V.pdf |
| Summary: | The competitive adsorption of organic molecules (2,7-naphthalenedisulfonic
acid) and adsorbed His of interest in relation to its influence on H absorption
into a Pd-Ni electrodeposited alloy. The experimental results, in acid
solution, show an enhancement of the coverage of the electrode surface with
adsorbed H due to the competitive adsorption of organic molecules that
interfere with H atoms, through lateral attractive interactions between the
adsorbed species and communal electronic effects, leading supposedly to a
decreased probability of H entry into the alloy. Chemisorbed H is, on the
other hand, an intermediate in the HER, so the enhancement of the electrode
coverage in the presence of co-adsorbed organic molecules promotes the
hydrogen evolution reaction. |
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| ISSN: | 0352-5139 1820-7421 |