Iron-copper bimetals for Fenton-like catalysis were developed, due to efficient enhancement of catalytic activity by iron-copper synergy. However, deviation exists in mechanism analysis of multi-effect catalysis. In this study, a new in-situ strategy of shielding Fe(II) and Cu(I) from further reaction by trapping agents was developed, for analysis of iron catalysis alone, copper catalysis alone and synergistic effect in bimetallic catalyst systems. Inhibition efficiency and influence of trapping agents on Fe(II)/Cu(I) catalysis were quantitatively evaluated for reliability confirmation and method correction. The possible application scope was identified as pH of 4–6, and this strategy was available for analysis of five different groups of catalysts. The potential superiority and difference of the proposed strategy compared with current ex-situ strategy were also analyzed. The overestimation (12.1%–35.4%) of copper catalysis and biased analysis (0.1%–12.6%) of iron catalysis by ex-situ strategy can be alleviated, thereby improving accuracy for synergistic effect. In summary, this study proposed a new strategy to improve the understanding of iron-copper bimetallic catalysis, which can provide reference for other polymetallic catalysis analysis development.

由于铁铜协同作用有效增强了催化活性，开发了用于类芬顿催化的铁铜双金属。然而，多效催化机理分析存在偏差。在这项研究中，开发了一种新的原位策略，即通过捕集剂屏蔽 Fe(II) 和 Cu(I) 的进一步反应，用于单独分析铁催化、单独铜催化和双金属催化剂体系中的协同效应。定量评估捕集剂对 Fe(II)/Cu(I) 催化的抑制效率和影响，以进行可靠性确认和方法校正。可能的应用范围被确定为 4-6 的 pH 值，该策略可用于分析五组不同的催化剂。还分析了所提出的策略与现有的易地策略相比的潜在优势和差异。通过非原位策略可以缓解铜催化的高估（12.1%–35.4%）和铁催化的偏差分析（0.1%–12.6%），从而提高协同效应的准确性。综上所述，本研究提出了一种提高对铁铜双金属催化理解的新策略，可为其他多金属催化分析的发展提供参考。