Three-dimensional amorphous tungsten-doped nickel phosphide microsphere as an efficient electrocatalyst for hydrogen evolution

Metal Oxide Nanostructures Generated from In Situ Sacrifice of Zinc in Bimetallic Textures as Flexible Ni/Fe Fast Battery Electrodes

“…Moreover,a tt he same time, active materials in powder form bring further problems when fabricating flexible devices,a nd narrows the range of applications as ab inder is required during electrode preparation. Different from previous reports, [17][18][19] the electrodes can produce superior capacity without anyh eat treatments ot hat the whole process can be completed at room temperature. At the same time, these techniques are widely reported to be capable of generating surficial self-supported nanostructures, which significantly enhance the surficial area of the electrodes.…”

“…[1] The nickel/iron battery,a lso known as the Edison battery,i s am ember of the safe and cost-efficient nickel-based aqueous alkaline batteries family.A lthough the nickel/iron system was invented over 100 years ago, [2] it has come into its second spring with the development of nanotechnology.D elicate syntheses of nanostructured nickel oxide, iron oxide,a nd metal oxide-carbon composites have been widely reported. [17][18][19] Here, we devise an in situ sacrifice process to fabricate binder-free nanostructured NiO x /FeO x electrodes from bimetallic textures at room temperature. However,w ith conventional nano synthesis, nearly all these works require ah igh-temperature process, which yields powder products.…”

In Situ Growth of Sn‐Doped Ni3S2 Nanosheets on Ni Foam as High‐Performance Electrocatalyst for Hydrogen Evolution Reaction

“…As observed in Figure b and Table S2, Sn‐doped Ni 3 S 2 nanosheets yield the Tafel slope of 51 mV per decade, which is much lower than that of Ni 3 S 2 nanorods (114 mV/decade) and other Sn‐doped samples (77 mV/decade for TNS1, 123 mV/decade for TNS3 and 138 mV/decade for TNS4). Generally, in acid solutions, the HER process can be divided into three steps involved with different Tafel slopes, namely, Volmer reaction (120 mV/decade), Heyrovsky reaction (40 mV/decade), and Tafel reaction (30 mV/decade), respectively . The Tafel slope of 51 mV per decade suggests Sn‐doped Ni 3 S 2 nanosheets follow the Volmer‐Heyrovsky mechanism, corresponding to a fast adsorption reaction, and then an electrochemical desorption process as the rate controlling step.…”

In-Situ Generation of Oxide Nanowire Arrays from AgCuZn Alloy Sulfide with Enhanced Electrochemical Oxygen-Evolving Performance

“…Co, Ni and W) have been widely applied in electrocatalysis. [17][18][19][20][21][22] Current research have found out that metal oxides as water oxidation catalysts exhibit excellent activity and durability. 3,12,23 Among metal oxides, IrO2 and RuO2 have proved to be the best OER catalysts.…”