✦ LIBER ✦

The effect of surface roughness on the hydrogen evolution reaction kinetics with mild steel and nickel cathodes

✍ Scribed by Alan P. Brown; M. Krumpelt; R.O. Loutfy; N.P. Yao

Publisher: Elsevier Science
Year: 1982
Tongue: English
Weight: 363 KB
Volume: 27
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(82)85039-1

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✦ Synopsis

Ahtract

-The effect of electrode surface roughness on the kinetics of the hydrogen evolution reaction has been studied for mild steel and nickel cathodes in 10 M NaOH at 348 0 K. With the nickel cathodes, the 'T'afel slope was independent of whether the electrode surface was smooth or roughened, but the exchange current density was about twice that for the roughened electrode. With the mild steel cathodes, the roughened electrode showed a considerably lower Tafel slope than the smooth electrode with b = 51 mV for the rough electrode and b = 1lOmV for the smooth one. The exchange current density was also lower for the roughened mild steel cathode than for the smooth electrode: 1.0 x lo-' A/cm' vs 2.3 x 10-s A/cm*.

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