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Reveals low onset potential and stability in urea oxidation reaction catalysts, suggesting a novel design approach.
The development of highly active urea oxidation reaction (UOR) catalysts with superior anti‐poisoning capability poses a critical challenge for the large‐scale application of urea electrolysis. Guided by the strong metal‐support interaction (SMSI) strategy, this work constructs a NiCo‐Na 0.3 WO 3 SMSI catalyst featuring strong electronic interactions between Na 0.3 WO 3 and NiCo alloy, engineered via electronic orbital‐level modulation driven by their significant work function difference. Distinct from conventional dual‐active‐site synergism that primarily relies on empirical geometric bifunctionality, this unique SMSI optimizes the adsorption behavior of urea molecules and weakens the adsorption of the toxic CO 2 by reducing the degree of orbital symmetry matching, addressing the core issue of catalyst poisoning and deactivation. Consequently, the fabricated catalyst demonstrates a low onset UOR potential (1.29 V RHE ) and long‐term stability (maintaining operation for 250 h at 100 mA cm −2 ), highlighting its viability for urea electrolysis applications. This work elucidates the inhibitory mechanism of SMSI against CO 2 poisoning on metal surface from an electronic orbital perspective, establishing a novel paradigm for designing highly active and stable UOR catalysts.
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Zhai et al. (2026) studied this question.
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