Regulating electrolyte basicity via CaCO3 additives for enhanced corrosion resistance of Ni anodes in low-temperature molten carbonate
Source abstract
Abstract
Electrochemical reduction of CO 2 in molten carbonate at low temperatures (< 500 °C) is restricted by the instability of Ni anodes. Herein, we revealed that the corrosion of Ni anodes in low-temperature molten carbonates was induced by the decrease in local basicity of anode/electrolyte interface during electrolysis. Thus, CaCO 3 was used as an additive to increase electrolyte basicity and modulate the anode/electrolyte interface. The addition of CaCO 3 significantly reduced the solubility of NiO scale in molten carbonate and enhanced the corrosion resistance of Ni at 475 °C, thereby making Ni as a suitable inert anode for low-temperature molten carbonate electrolysis.
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Research context
OpenAlex topics: Molten salt chemistry and electrochemical processes · Advancements in Solid Oxide Fuel Cells · CO2 Reduction Techniques and Catalysts
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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