首页|Tuning electrochemical water activation over NiIr single-atom alloy aerogels for stable electrochemiluminescence
Tuning electrochemical water activation over NiIr single-atom alloy aerogels for stable electrochemiluminescence
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The anodic oxygen evolution reaction is a well-acknowledged side reaction in traditional aqueous electrochemiluminescence(ECL)systems due to the generation and surface aggregation of oxygen at the electrode,which detrimentally impacts the stability and efficiency of ECL emission.However,the effect of reactive oxygen species generated during water oxidation on ECL luminophores has been largely overlooked.Taking the typical luminol emitter as an example,herein,we employed NiIr single-atom alloy aerogels possessing efficient water oxidation activity as a prototype co-reaction accelerator to elucidate the relationship between ECL behavior and water oxidation reaction kinetics for the first time.By regu-lating the concentration of hydroxide ions in the electrolyte,the electrochemical oxidation processes of both luminol and water are finely tuned.When the concentration of hydroxide ions in electrolyte is low,the kinetics of water oxidation is attenuated,which limits the generation of oxygen,effectively mitigates the influence of oxygen accumulation on the ECL strength,and offers a novel perspective for harnessing side reactions in ECL systems.Finally,a sensitive and stable sensor for antioxidant detection was constructed and applied to the practical sample detection.
State Key Laboratory of Green Pesticide,International Joint Research Center for Intelligent Biosensing Technology and Health,College of Chemistry,Central China Normal University,Wuhan 430079,China
Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials,Wuhan Institute of Technology,Wuhan 430205,China
Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China
National Natural Science Foundation of ChinaNatural Science Foundation of Hubei ProvinceKnowledge Innovation Program of Wuhan-Shuguang ProjectFundamental Research Funds for the Central UniversitiesProgram of Introducing Talents of Discipline to Universities of China(111 program)support of 1W1B beamline at the Beijing Synchrotron Radiation Facility
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