Unveiling the effect of the crystalline phases of iron oxyhydroxide for highly sensitive and selective detection of dopamine
- Title
- Unveiling the effect of the crystalline phases of iron oxyhydroxide for highly sensitive and selective detection of dopamine
- Author
- 이상욱
- Issue Date
- 2021-08
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- DALTON TRANSACTIONS, v. 50, NO 38, Page. 13497-13504
- Abstract
- Electrocatalysis is key to the development of several important energy and biosensing applications. In this regard, the crystalline phase-dependent electrocatalytic activity of materials has been extensively studied for reactions such as hydrogen evolution, oxygen reduction, etc. But such comprehensive studies for evaluating the phase-dependence of electrochemical biosensing have not been undertaken. Herein, three crystalline phases (alpha-, beta-, and gamma-) of iron oxyhydroxide (FeOOH) have been synthesized and characterized by spectroscopic and microscopy techniques. Electrochemical studies revealed their high sensitivity and selectivity towards dopamine (DA) detection. Amongst the three electrocatalysts, beta-FeOOH shows the highest sensitivity (337.15 mu A mM(-1) cm(-2)) and the lowest detection limit (0.56 mu M). The enhanced electrocatalytic activity of beta-FeOOH, as compared to that of alpha- and gamma-FeOOH, was attributed to its higher active site percentage and facile electrode kinetics. Furthermore, theoretical studies probed into the DA-FeOOH interactions by evaluating the charge transfer characteristics and hydrogen adsorption energies of the three phases to support the experimental findings.
- URI
- https://pubs.rsc.org/en/content/articlelanding/2021/DT/D1DT01672Ehttps://repository.hanyang.ac.kr/handle/20.500.11754/168927
- ISSN
- 14779226; 14779234
- DOI
- 10.1039/d1dt01672e
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > CHEMICAL AND MOLECULAR ENGINEERING(화학분자공학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML