Abstract
Precious metals are considered as the most efficient electrocatalysts for boosting the dynamic process of cathode in water electrolysis devices. Due to the large surface areas and the low coordination numbers of surface atoms, their one-dimensional ultrafine nanowires and two-dimensional ultrathin nanosheets are continually being investigated, while stacking problems inevitably affect their activities and stabilities.We describe herein a three-dimensional metal network electrocatalyst consisting of a worm-like S-doped RhNi alloy (S-RhNi), which improves the performance for hydrogen evolution reaction (HER). Experimental results reveal that S-RhNi exhibits Pt-like HER activity with an onset potential close to 0 mV and a Tafel slope of 24.61 mV dec−1 in 0.5 M H2SO4 aqueous solution, having also good stability. The polarization curve shifts only 3.9 mV at a current density of −60 mA cm−2 after 1,000 cycles and the potential displays a slight change after holding the current density at −20 mA cm−2 for 10 h. This improved performance is supposed to be originated from the combination between the worm-like RhNi alloy, doped S atoms, and the three-dimensional structure. Overall, the results obtained and the facile synthesis methods offer a promising electrocatalyst for scaling-up hydrogen evolution.
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.