Abstract
AbstractThe strong affinity of palladium (Pd) towards hydrogen is the main challenge for hydrogen desorption application. Therefore, in this report, we synthesized nickel, copper, and cobalt core and palladium shell nanostructure supported on nitrogen, sulfur‐doped reduced graphene oxide (M@Pd/N, S‐rGO, M=Ni, Cu, Co) by hydrothermal method followed by reduction of the metal nanoparticles using modified polyol method. Using X‐ray diffraction (XRD), Raman spectroscopy, High resolution transmission electron microscope (HRTEM), Field emission scanning electron microscope (FESEM), and X‐ray photoelectron spectroscopy (XPS), the physicochemical properties of the synthesized sample was investigated. The results confirm strong interactions between M@Pd and higher surface area support that could enhance electrocatalytic activity towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Among the synthesized electrocatalyst, Ni@Pd/N,S‐rGO exhibits higher electrocatalytic activity with small over potential 0.035 V and 0.2 V at 10 mA/cm2 and a Tafel slope value of 39 mV dec−1 and 34 mV dec−1 for HER and OER, respectively. The Ni@Pd/N,S‐rGO electrocatalyst demonstrated excellent stability with a negligible current decrease for 12 h. The Cdl calculation shows a result of 2.2 mF μg−1 for Ni@Pd/N,S‐rGO, 1.9 mF μg−1 for Cu@Pd/N,S‐rGO, and 1.5 mF μg−1 for Co@Pd/N,S‐rGO.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
