Electrochemical synthesis of high-value chemicals using renewable electricity could lead to sustainability advantages over conventional chemical manufacturing. The tight coupling between paired anodic and cathodic reactions in conventional electrochemical processes, however, constrains the products and their efficiencies. Here, we demonstrate a strategy to achieve modular electrochemical synthesis (ModES) of different chemicals by decoupling and pairing the oxidative and reductive half-reactions with a heterogeneous redox reservoir (RR). Specifically, sodium nickel hexacyanoferrate (NaNiHCF) can serve as a robust and reversible RR that enables the modular production of several strong oxidants, hydrogen peroxide (H₂O₂) and sodium persulfate (Na₂S₂O₈) or active chlorine, in separate RR-coupled electrochemical processes. The system’s excellent performance and operational stability is demonstrated by continuous operation over 100 cycles (∼36 h) to produce H₂O₂ and Na₂S₂O₈ with a high voltage efficiency. The concept presented here highlights the prospects for using RRs to enable efficient, modular, and on-demand electrochemical synthesis of valuable chemicals.

使用可再生电力进行的高价值化学品的电化学合成可以带来优于常规化学品制造的可持续性优势。然而，在常规电化学方法中，成对的阳极反应和阴极反应之间的紧密耦合限制了产物及其效率。在这里，我们演示了一种策略，该方法通过将氧化和还原半反应与异质氧化还原储层（RR）分离和配对来实现不同化学物质的模块化电化学合成（ModES）。具体来说，六氰合铁氰化钠镍（NaNiHCF）可以作为稳健且可逆的RR，从而实现多种强氧化剂，过氧化氢（H ₂ O ₂）和过硫酸钠（Na ₂ S ₂）的模块化生产。O ₈）或活性氯，在单独的RR耦合电化学过程中。该系统出色的性能和操作稳定性可通过连续运行100个周期（约36小时）以产生高电压效率的H ₂ O ₂和Na ₂ S ₂ O ₈来证明。此处介绍的概念突出了使用RR实现有价值的化学物质的高效，模块化和按需电化学合成的前景。