Electrochemical CO2 reduction (CO2RR) to sustainable fuels and chemicals represents a pivotal strategy for carbon neutrality, yet conventional static methods suffer from limited selectivity, instability, and energy inefficiency. This review examines pulsed CO2RR (p-CO2RR) as a transformative approach that transcends these limitations by dynamically modulating catalyst microenvironments through temporal control of applied potentials. We first establish the fundamental pulse parameters, potential amplitude, frequency, duty cycle, and period that govern interfacial processes and product distributions. Subsequently, we analyze recent advances in p-CO2RR across transition metal catalysts (Cu, Ni, Sn, Fe), highlighting breakthroughs in C1 (CO, formate, CH4) and C2+ (ethylene, ethanol, branched hydrocarbons) production. By decoupling reaction steps temporally, pulsed strategies enhance Faradaic efficiency, suppress competing hydrogen evolution, and extend catalyst stability. The review concludes with forward-looking perspectives on asymmetric pulse optimization, machine-learning-guided parameter discovery, and scalable reactor designs to accelerate the industrial adoption of dynamic electrocatalysis.
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