Regulation engineering of the surface and structure of perovskite-based electrocatalysts for the oxygen evolution reaction

Abstract

Perovskite oxides with low cost and adjustable structure have been widely used as electrocatalysts for oxygen evolution reaction (OER). However, most perovskite oxides have inherent barriers of low catalytic activity...

Toward Realistic Models of the Electrocatalytic Oxygen Evolution Reaction

“…Lattice oxidation mechanisms are again widely accepted to be operative in perovskites, ,,− as well as oxides and oxyhydroxides, ,− ,, making LOM control a major design concept. ,,,, And though initially the LOM was studied as means of enhancing OER activity, because the LOM is now viewed as a significant source of catalyst instability, , effort is now also going into finding means of suppressing it, though there are reports that increased covalency could result in decreased dissolution of ions and increased stability. , Further work will be needed to understand if catalysts should be designed to have increased LOM activity, and if so, which type of LOM is preferred. Unfortunately, much of that work is outside the capabilities of the CHE.…”

Advances in the mechanism investigation for the oxygen evolution reaction: fundamental theory and monitoring techniques

“…7 The complexity of the OER adds significant overpotential to the realistic water splitting procedure, resulting in sluggish reaction kinetics. [8][9][10][11][12] With the aim of significantly reducing the reaction overpotential, several studies have been published focusing on powerful OER electrocatalysts with different composites and structures [13][14][15][16][17][18][19][20][21][22][23][24][25][26] such as noble metals, metal single-atoms, 27,28 layered double hydroxides (LDHs), and metal oxides or chalcogenides. 29,30 The exploration and development of the best-fit catalysts depend critically on a thorough knowledge of the fundamental catalytic mechanisms, which necessitates the mapping of actual reaction pathways.…”

Recent advances and perspectives of Ir-based anode catalysts in PEM water electrolysis

“…To the best of our knowledge, some relevant reviews have been completed mainly focused on reports of Ir and Ru-based catalysts in acidic OER, while there are very few summaries of their practical applications in PEMWE. 14,27,[36][37][38] Actually, this issue is very important to comprehensively understand the current state of the Ir-based catalysts development for practical applications. Therefore, in this review, we first briefly introduce the working principle of PEMWE and the key components and their functions in the devices.…”