Synthesis of NiFeOx nanocatalysts from metal–organic precursors for the oxygen evolution reaction

Abstract

Organometallic synthesis of NiFe oxide nanoparticles provided 4 nm large nanocatalysts with activity in water splitting that depended on their NiFe ratio and surface state and was optimum for a Ni2Fe1 composition and aminophosphonic acid coating.

Designing a Phenalenyl-Based Dinuclear Ni(II) Complex: An Electrocatalyst with Two Single Ni Sites for the Oxygen Evolution Reaction (OER)

“…have gained considerable limelight for their promising performance toward OER, their high cost and scarcity have limited their usage on an industrial scale. , The earth-abundant base metals such as Co, Ni, Mn, Fe, etc., cover the current interest in developing economic and productive electrocatalysts for OER. − Among these metals, Ni-based materials have gained peculiar attention for their high water oxidation efficiency and low overpotentials. , In fact, the hydroxides and oxides based on Ni metal are one of the best-studied candidates for OER, owing to their high reaction rates and low overpotential values . Meanwhile, for these nickel oxides/hydroxides, the difficulty in accurately identifying and describing the reactive surface structure and the active site has caused a large variation in the literature values for OER onset potential, overpotential, and reaction kinetics. − Recent approaches, such as computational studies, have been successfully employed to understand atomic-level models for describing electrochemical OER reaction kinetics and mechanisms. ,, Meanwhile, the studies employing nickel-based oxides/hydroxide catalysts often require an approximation to the model systems during the computational studies, as they lack a well-defined catalytic structure, and the activity is dependent on the molecular packing. − However, it is important to describe the realistic working catalysts to facilitate the structure modifications for improving catalytic performances and identifying the structure–activity relationships …”

Nanospike Nickel-Iron Oxalate as an Efficient Electrocatalyst for the Oxygen Evolution Reaction

“…Nickel-based oxides systems have received particular attention in this regard, showing excellent catalytic performance in basic media due to the synergy of the nickel and iron centers for modulating the electronic structure of the active site. [7][8][9][10][11][12][13][14] More recently, several studies have explored the preparation of transition metal oxalates and their OER activity. [15][16][17][18][19][20][21][22] Zhang, Cao, and co-workers reported a nickel-iron oxalate nanomesh prepared by a solvothermal synthesis that exhibited small overpotential of 203 mV to reach 50 mV cm −2 in basic media.…”

Ultrathin NiFe-Based Nanosheet Electrocatalysts for Efficient Water Oxidation

“…Metals used to fabricate bimetallic selenides primarily include Ni–Co, Co–Fe, Ni–Mo, and so forth, and few NiFe-based selenides have been reported. On the contrary, NiFe-based oxides, − (oxy)­hydroxides, ,− and layered double hydroxides − are widely reported.…”