Mitigating the inherent spatio-temporal stochasticity and intermittency of renewable power is key for enabling the decarbonization of the power grid and motivates the development of flexible technologies that can shift power demand and supply across space–time and scales. Here we develop an electrochemical synthesis strategy capable of providing demand (load) flexibility at different timescales by participating in multiple electricity markets (day ahead, real time and frequency regulation). Using a fast proton-conducting redox material, copper hexacyanoferrate, highly rate-mismatched modular electrochemical synthesis was achieved by decoupling half reactions with different intrinsic kinetics to produce chemicals under drastically different reaction rates and timescales: the fast hydrogen evolution reaction and slow persulfate production reaction. Such a strategy enables flexible participation in different electricity markets and can reduce electricity cost of chemical production by 30–40%. These results open a conceptual strategy for flexibly integrating modular electrochemical manufacturing processes into the fluctuating power grid to achieve more economical and sustainable operations.

减轻可再生能源固有的时空随机性和间歇性是实现电网脱碳的关键，并推动灵活技术的发展，以跨时空和规模改变电力需求和供应。在这里，我们开发了一种电化学合成策略，能够通过参与多个电力市场（提前、实时和频率调节）来提供不同时间尺度的需求（负载）灵活性。使用快速质子传导氧化还原材料六氰基铁酸铜，通过解耦具有不同本征动力学的半反应来实现高度速率失配的模块化电化学合成，从而在截然不同的反应速率和时间尺度下产生化学品：快速析氢反应和缓慢的过硫酸盐生产反应。这种策略可以灵活参与不同的电力市场，可以降低化工生产的电力成本30%~40%。这些结果开启了一种概念策略，可以将模块化电化学制造工艺灵活地集成到波动的电网中，以实现更经济和可持续的运营。