Macrocyclic cyanocobalamin (vitamin B₁₂) as a homogeneous electrocatalyst for water oxidation under neutral conditions
2020
Hossain, M. Shahadat | Younus, Hussein A. | Aḥmad, Naz̲īr | Zhang, Shiguo | Zhuiykov, Serge | Verpoort, Francis
Highly water-soluble cyanocobalamin (also known as vitamin B₁₂) is the most structurally macrocyclic complex comprising cobalt in the center of a corrin ring. Interestingly, it acts as a robust electrocatalyst in water oxidation at ∼0.58 V overpotential with a faradaic efficiency of 97.50% under neutral buffered conditions. The catalyst is impressively stable even after long-term bulk electrolysis, and homogeneous in nature, as established by a series of experiments and characterization techniques.
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