PDF Publication Title:
Text from PDF Page: 070
58 THE MANUFACTURE OF CHEMICALS BY ELECTROLYSIS obtained during reduction depends in many cases entirely upon the electrode potential (potential difference between the cathode and the solution in which it is immersed), and the experimental work of Lob and Haber confirms this. The catalytic effect of copper is shown in the reduction of nitrobenzene, which at a copper cathode is reduced to aniline, but while copper sponge under ordinary chemical conditions will reduce phenyl-hydroxylamine to aniline it has no effect upon nitrobenzene, and the inference is that in electrolytic reduction phenylhydroxylamine may be first formed by electrolysis, and this substance is then con- verted to aniline largely by the catalytic effect of the copper cathode. Nitric acid is reduced electrolytically to hydroxylamine at a lead cathode, but at a copper cathode ammonia is the product; and since copper will not reduce nitric acid chemically to hydroxylamine but will reduce this substance itself to ammonia, it would appear that the first stage is electrolytic, and in the presence of a copper cathode the hydroxylamine is further reduced to ammonia. There is room for further investigation regarding the matter. 1 Some recent work by E. Newbery has provided a con- siderable number of trustworthy overvoltage determina- tions which should prove valuable in choosing the proper electrode for any given reduction. By overvoltage is understood the excess back electromotive force above that of a hydrogen electrode in the same electrolyte, and this has been measured by direct comparison with a hydrogen 1 Trans. Chem.tfoc,1916,109,1051.PDF Image | MANUFACTURE OF CHEMICALS BY ELECTROLYSIS
PDF Search Title:
MANUFACTURE OF CHEMICALS BY ELECTROLYSISOriginal File Name Searched:
the_manufacture_of_chemicals_by_electrolysis.pdfDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Power up your energy storage game with Salgenx Salt Water Battery. With its advanced technology, the flow battery provides reliable, scalable, and sustainable energy storage for utility-scale projects. Upgrade to a Salgenx flow battery today and take control of your energy future.
| CONTACT TEL: 608-238-6001 Email: greg@salgenx.com | RSS | AMP |