Highly efficient, 1D structure bi-functional electrocatalyst based on Co atoms with ultralow Ru nanoclusters for overall water splitting in acidic electrolyte
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초록
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We fabricated free-standing bi-functional catalytic electrode of cobalt-nitrogen-carbon matrix with ultra-low loading of ruthenium nanoclusters for efficient water splitting in acidic media. One dimensional tellurium nanowires with porous structure were firstly prepared, followed by the subsequent coating process by metal-organic framework (MOF) with bimetallic zinc and cobalt. After this process, the complex was annealed under argon flow at 950°C to evaporate tellurium and zinc and produce porous carbon matrix with atomic Co sites. After the annealing process, it was immersed in the ruthenium solution and ruthenium nanoclusters fill where the tellurium and zinc were evaporated. The electrodes were applied to the acid water electrolyzer toward both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) simultaneously. The results suggest that the complex is performing similar or superior to noble metal catalysts, implying a promising prospect in the catalytic field.