Reforming CH₄ into syngas using CO₂ remains a fundamental challenge due to carbon deposition and nanocatalyst instability. We, for the first time, demonstrate highly efficient electrochemical reforming of CH₄/CO₂ to produce syngas in a solid oxide electrolyser with CO₂ electrolysis in the cathode and CH₄ oxidation in the anode. In situ exsolution of an anchored metal/oxide interface on perovskite electrode delivers remarkably enhanced coking resistance and catalyst stability. In situ Fourier transform infrared characterizations combined with first principle calculations disclose the interface activation of CO₂ at a transition state between a CO₂ molecule and a carbonate ion. Carbon removal at the interfaces is highly favorable with electrochemically provided oxygen species, even in the presence of H₂ or H₂O. This novel strategy provides optimal performance with no obvious degradation after 300 hours of high-temperature operation and 10 redox cycles, suggesting a reliable process for conversion of CH₄ into syngas using CO₂.

中文翻译：

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固体氧化物电解槽中CH4 / CO2的高效电化学重整。

由于碳沉积和纳米催化剂的不稳定性，使用CO _2将CH ₄重整为合成气仍然是一个基本挑战。我们首次展示了CH ₄ / CO _2的高效电化学重整，以在固体氧化物电解槽中产生合成气，其中阴极为CO ₂电解，阳极为CH ₄氧化。钙钛矿电极上锚固金属/氧化物界面的原位析出可显着提高抗焦化性和催化剂稳定性。原位傅立叶变换红外表征与第一原理计算相结合，揭示了在CO之间的过渡态下CO ₂的界面活化_2个分子和一个碳酸根离子。即使在H ₂或H ₂ O存在的情况下，通过电化学方法提供的氧也非常有利于界面处的碳去除。这种新颖的策略可提供最佳性能，并且在高温运行300小时和10个氧化还原循环后不会出现明显的降解。使用CO ₂将CH ₄转化为合成气的可靠方法。