Abstract
Active cobalt alloy cathodes for hydrogen evolution in 8 kmol·m -3 NaOH at 90°C was tailored by electrodeposition. Enhancement of cathodic activity of Co-Ni alloys was carried out by the formation of Co-Ni-Fe-C alloys. The addition of both iron and carbon was effective in enhancing the electrolytic hydrogen evolution activity, and the carbon addition was further effective in preventing preferential dissolution of iron and cobalt, that is, dealloying corrosion during shutdown period in the hot concentrated alkaline solution. The fcc Co-Ni-Fe-C alloys with about 15 at% iron showed the best performance with high hydrogen evolution activity and durability without dealloying corrosion. The alloys with high iron contents forming the bcc structure and showing sufficiently high activity without carbon addition suffered readily dealloying corrosion, and complete prevention of dealloying of the high iron alloys was not achieved by carbon addition.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.