Topic
Nickel
About: Nickel is a research topic. Over the lifetime, 79308 publications have been published within this topic receiving 1210058 citations. The topic is also known as: Ni & element 28.
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TL;DR: In this article, the kinetics of the OER proceeding on anodic passive oxides of iron, cobalt and nickel are probed using steady state polarisation to ascertain values of the Tafel slope, b, and the OH− ion reaction order, m OH -.
296 citations
TL;DR: In this article, the surface free energy of all the f.c.c., b.c, and alpha-iron surfaces was analyzed and the effect of oxygen on the γ plots of a number of F.c.c. metals was established as deepening the {100} and {111} cusps.
295 citations
TL;DR: In this paper, the formation of porous NiCo oxide (NixCo3−xO4) nanowires from single crystal nickel cobalt bimetallic carbonate hydroxide (NiCo cNW) for supercapacitor applications is presented.
295 citations
TL;DR: In this paper, a nickel-based oxygen evolution catalyst derived from pulse-electrodeposited nickel sulfide was found to produce current densities of 10 mA/cm2 at the relatively low overpotential of 320 mV in alkaline electrolyte (1 M KOH).
Abstract: Oxygen evolution catalysts composed of a metal (Ni, Co, or Fe) and a pnictide or chalcogenide (P, S, or Se) counterion are a promising class of electrocatalysts for the oxygen evolution reaction (OER), an important reaction for the photoelectrochemical splitting of water. We synthesized a nickel-based oxygen evolution catalyst derived from pulse-electrodeposited nickel sulfide. This catalyst was found to produce current densities of 10 mA/cm2 at the relatively low overpotential of 320 mV in alkaline electrolyte (1 M KOH). Importantly, we found that the sulfur anion in the nickel sulfide is depleted in the active form of the electrocatalyst and that the NiS is converted into an amorphous nickel oxide in the potential range where water is oxidized to oxygen. The superior catalytic activity of this nickel sulfide is thus unrelated to the sulfur anions in the active catalyst but is instead related to the metal sulfide’s ability to act as a precursor to a highly active nickel oxide OER electrocatalyst. The nic...
295 citations
294 citations