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Operando-electrified solvay process
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DOI：10.1038/s41467-025-63539-3.png)
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Abstract
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Replacing energy- and cost-intensive Solvay process with innovative manufacture protocol, such as operando-electrified synthesis, would provide a simpler, scale-flexible pathway to produce NaHCO3. However, the commercialization of such technique is hampered by the bottleneck problem of small productivity, which is two orders of magnitude below traditional Solvay process. This might be attributed to the gap in conditions between embedded processes inside the system, especially low concentrations of local alkaine, which are generated relatively slowly from one-electron hydrogen chemistry, leading to a small CO2–to–HCO3− conversion ratio. Guided by octet rule, here we embed eight-electron nitrogen chemistry into Solvay process, maximizing local alkalines generation for CO2 conversion. By further breaking the stumbling scaling relationship with a liquid metal-derived catalyst, the system achieves productivity up to 3.63 mol L−1 h−1. NaHCO3 production is energy- and cost-intensive. Here the authors report an operando electrosynthesis system by embedding nitrate reduction reaction into Solvay system, achieving high NaHCO3 productivity even up to 4.58 times of benchmark industrial route.
Keywords:
Operando-electrified synthesis
NaHCO3 production
nitrogen chemistry
liquid metal-derived catalyst
CO2 conversion
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