Bimetallic‐Based Electrocatalysts for Oxygen Evolution Reaction

Abstract

The electrochemical oxygen evolution reaction (OER) is a core electrode reaction for the renewable production of high-purity hydrogen, carbon-based fuel, synthetic ammonia, etc. However, the sluggish kinetics of the OER result in a high overpotential and limit the widespread application of OER-based technologies. Recent studies have shown that bimetallic-based materials with the synergism of different metal components to regulate the adsorption and dissociation energy of intermediates are promising OER electrocatalyst candidates with a lower cost and energy consumption. In the past two decades, tremendous efforts have been devoted to developing OER applications of bimetallic-based materials with a focus on compositions, phase, structure, etc., to highlight the synergism of different metal components. However, there is a lack of critical thinking and organized analysis of OER applications with bimetallic-based materials. This review critically discusses the challenges of developing bimetallic-based OER materials, summarizes the current optimization strategies to enhance both activity and stability, and highlights the state-of-the-art electrocatalysts for OER. The relationship between the componential/structural features of bimetallic-based materials and their electrocatalytic properties is presented to form comprehensive electronic and geometric modifications based on thorough analysis of the reported works and discuss future efforts to realize sustainable bimetallic-based OER applications.

Recent progress in electrocatalytic selectivity in heterogeneous electro-Fenton processes

“…In addition, EF technology is usually used in conjunction with other technologies such as occulation and precipitation. To improve the efficiency of EF treatment of pollutants, it can be combined with ozone oxidation, light source (UVA and sunlight) assistance, biological treatment, and other methods 156,168,169 to regenerate Fe(II) faster and produce more homogeneous $OH, achieving the purpose of reducing costs and improving efficiency. The concentration of homogeneous $OH can also be improved by external eld conditions such as Fe(II) generation by external cathode, O 3 addition, and adjustment of the supply voltage.…”

Experimentally revealed and theoretically certified synergistic electronic interaction of V-doped CoS for facilitating the oxygen evolution reaction

“…5 Hydroelectrolysis involves two half reactions: the HER (hydrogen evolution reaction) and OER (oxygen evolution reaction). 6,7 Compared with the HER, the OER has become the key to restrict the efficiency of hydrogen production from electrolytic water due to the sluggish kinetics characteristics of the four-electron transfer process. 8,9 At present, only the precious metals IrO 2 and RuO 2 have reached the requirements of commercial use.…”

Engineering Active Sites Enriched 2D-on-1D NiFe and NiCo Layered Double Hydroxide-Decorated Ni Nanowire Networks for Oxygen Evolution Reaction

“…Transition metal-based electrocatalysts represent promising competitors that can replace noble metal-based ones, including oxides, hydroxides, sulfides, nitrides, and phosphides. − Among these materials, LDHs have emerged as a highly promising class capable of meeting the majority of the criteria for effective electrocatalysts in alkaline media due to their distinguished 2D structure with interlayer spaces, large active surface areas, and tunable compositions. , NiFe LDH is regarded as highly efficient as an electrocatalyst in alkaline media due to its ability to facilitate the OER process with a low overpotential. − Several studies have been conducted to further enhance the NiFe-LDH activity toward the OER. However, developing an ideal electrocatalyst for the OER is not yet accomplished.…”