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However, the sluggish kinetics of these reactions severely limit energy efficiency, a challenge exacerbated by insufficient active\u2010site utilization and restricted tri\u2010phase mass transport. This review highlights recent advances in multiscale porous architectures for oxygen electrocatalysis, with particular emphasis on how pore size, connectivity, and hierarchical organization govern active\u2010site accessibility, mass transport, and catalytic kinetics. Unlike previous reviews primarily centered on specific material categories, this work adopts a structure\u2013function perspective to establish the correlations between porous architectures and electrocatalytic performance. Particular attention is given to d\u2010band electronic\u2010structure modulation and the confinement effects within hierarchically interconnected networks that expedite reactant diffusion. 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