NiCr-LDH–Co nanosheets on nickel foam as efficient oxygen evolution electrocatalysts in alkaline media

Abstract

The exploration of efficient, stable, and economical electrocatalysts for oxygen evolution reaction (OER) is of great significance and challenge for the development of renewable energy. A serious of Ni-based layered...

Dynamically Restructuring NixCryO Electrocatalyst for Stable Oxygen Evolution Reaction in Real Seawater

“…Remarkably, Ni x Cr y O exhibited 2000 h stability at 10 mA cm −2 (Figure S16)—we observed <20 mV overpotential increase for the first 1500 h, although for the last 500 h the overpotential increased for about 60 mV due to prolonged operation in presence of various seawater impurities. At industrially relevant current densities, Ni x Cr y O exhibited 275 and 100 h stability at 100 and 500 mA cm −2 , respectively (Figure 5d and Figure S17), surpassing most Ni and Cr based catalysts reported so far [42,43] …”

“…Chemie industrially relevant current densities, Ni x Cr y O exhibited 275 and 100 h stability at 100 and 500 mA cm À 2 , respectively (Figure 5d and Figure S17), surpassing most Ni and Cr based catalysts reported so far. [42,43] The oxidation of chloride (Cl À ) ions imposes great threat to OER in seawater by the competing ClER. Interestingly, our Ni x Cr y O catalyst showed outstanding selectivity towards OER over ClER, even at high current densities.…”

Dynamically Restructuring NixCryO Electrocatalyst for Stable Oxygen Evolution Reaction in Real Seawater

“…industrially relevant current densities, Ni x Cr y O exhibited 275 and 100 h stability at 100 and 500 mA cm À 2 , respectively (Figure 5d and Figure S17), surpassing most Ni and Cr based catalysts reported so far. [42,43] The oxidation of chloride (Cl À ) ions imposes great threat to OER in seawater by the competing ClER. Interestingly, our Ni x Cr y O catalyst showed outstanding selectivity towards OER over ClER, even at high current densities.…”

Facile deposition of FeNi/Ni hybrid nanoflower electrocatalysts for effective and sustained water oxidation

“…22 Currently, research is focused on developing Ni alloy electrocatalysts with other non-noble metals such as Mo, Cr, Fe, etc. [23][24][25] Alloys of Ni and Fe are reported as the most promising electrocatalysts for oxygen evolution reactions due to their low cost, high activity, and stability. 23 Ni and Febased OER materials, including oxides, hydroxides, layered hydroxides, and alloys of binary and tertiary metal composites have been reported recently in several OER studies.…”