Supplying global energy demand with CO₂-free technologies is becoming feasible thanks to the rising affordability of renewable resources. Hydrogen is a promising vector in the decarbonization of energy systems, but more efficient and scalable synthesis is required to enable its widespread deployment. Here we report contactless H₂ production via water electrolysis mediated by the microwave-triggered redox activation of solid-state ionic materials at low temperatures (<250 °C). Water was reduced via reaction with non-equilibrium gadolinium-doped CeO₂ that was previously in situ electrochemically deoxygenated by the sole application of microwaves. The microwave-driven reduction was identified by an instantaneous electrical conductivity rise and O₂ release. This process was cyclable, whereas H₂ yield and energy efficiency were material- and power-dependent. Deoxygenation of low-energy molecules (H₂O or CO₂) led to the formation of energy carriers and enabled CH₄ production when integrated with a Sabatier reactor. This method could be extended to other reactions such as intensified hydrocarbons synthesis or oxidation.

由于可再生资源的价格上涨，用无CO _2的技术满足全球能源需求变得可行。氢是能源系统脱碳中的有前途的载体，但是需要更有效和可扩展的合成方法以使其广泛应用。在这里，我们报告了在低温（<250°C）下通过微波触发的固态离子材料的氧化还原活化，通过水电解产生的非接触H ₂。通过与非平衡g掺杂的CeO ₂反应来还原水，该CeO ₂以前是通过单独施加微波进行原位电化学脱氧的。微波驱动的还原通过瞬时电导率升高和O _2来确定释放。该过程是可循环的，而H _2的产率和能量效率取决于材料和功率。低能量分子（H ₂ O或CO ₂）的脱氧导致形成能量载体，并与Sabatier反应器集成后可产生CH ₄。该方法可以扩展到其他反应，例如增强的烃合成或氧化反应。