Recent Advances on Perovskite Electrocatalysts for Water Oxidation in Alkaline Medium

Abstract

Alkaline water splitting is a technique utilizing renewable resource-derived electricity to generate hydrogen with high purity. The oxygen evolution reaction (OER) with sluggish dynamics is the crucial half-reaction toward electrocatalytic water splitting, which needs a non-noble metal catalyst with high performance to make the reaction process be more energy-efficient and economical. Perovskite, as a kind of price moderate, compositional adjustable, structurally stable, and highly active material, has been widely used as the catalyst for the OER under alkaline conditions. In this review, we systematically expound the OERrelated catalytic mechanism, provide the evaluative criteria of catalytic performance, and then summarize the corresponding measurement methods of catalysts for the alkaline OER. Furthermore, our emphasis is given to the synthetic methods, the activity descriptors, and the performance optimization strategies of perovskite-based catalysts. Finally, we present a number of future directions on the development of more highly efficient perovskite-based catalysts for the alkaline OER.

Unveiling the electron configuration‐dependent oxygen evolution activity of 2D porous Sr‐substituted LaFeO3 perovskite through microwave shock

“…As shown in Figure 5a, the OER catalytic process on perovskite electrocatalysts can obey the following typical single-electron charge-transfer process on metal-ion centers. [3,5]…”

“…The oxygen evolution reaction (OER) is a crucial module in various renewable energy storage and conversion devices, including water electrolysis, carbon dioxide reduction, and rechargeable metal-air batteries. [1][2][3][4][5][6][7][8] However, the intricate four-proton coupled electron transfer process of OER poses significant challenges to achieving high energy conversion efficiency. [9][10][11][12] Despite the recognition of traditional noble metal-based electrocatalysts, such as RuO 2 and IrO 2 , as benchmark materials for OER, their widespread deployment on a larger scale is restricted due to the high cost and inherent instability.…”

Review and Perspectives of Carbon-Supported Platinum-Based Catalysts for Proton Exchange Membrane Fuel Cells

“…Furthermore, the carbon support material has poor chemical corrosion resistance and it is easily damaged by oxidation, which affects the binding ability between the support and catalyst particles and reduces catalyst performance . Nonprecious metal catalysts have gained popularity in recent years because of their advantages, such as low cost and good catalytic performance in alkaline electrolytes; , however, in acidic electrolytes, the corrosion of nonprecious metals will seriously reduce the stability of catalysts. The ORR kinetics in acidic media are substantially higher than in alkaline electrolytes, and the predominance of hydrogen ions in PEMFCs severely limits the application of nonprecious metal catalysts .…”

Nitrogen doped and carbon coated CoP hollow nanospheres with enhanced electrocatalytic activity towards the oxygen evolution reaction

“…Therefore, numerous efforts have been made to develop low cost electrocatalysts to take the place of the most advanced noble metal-based catalysts. 10–13…”

“…Therefore, numerous efforts have been made to develop low cost electrocatalysts to take the place of the most advanced noble metal-based catalysts. [10][11][12][13] Over the past few decades, a great number of potential nanomaterials including transition metals and their composites have provoked widespread interest due to their earth abundance and outstanding OER performance. [14][15][16][17][18] For example, the Co 9 S 8 composites via pyrolysis at 800 1C (Co 9 S 8 @CT-800) exhibited a small Z (about 390 mV, 10 mA cm À2 ) and Tafel slope (72 mV dec À1 ) for the OER.…”