Oxygen reduction reaction on nickel-based Prussian blue analog frameworks synthesized via electrochemical anodization route
- Title
- Oxygen reduction reaction on nickel-based Prussian blue analog frameworks synthesized via electrochemical anodization route
- Author
- 한성환
- Keywords
- Prussian blue analogue; Nickel hexacyanoferrate; Frameworks; Morphology; Electrocatalysis; ORR
- Issue Date
- 2018-10
- Publisher
- ELSEVIER SCIENCE SA
- Citation
- JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 828, page. 80-85
- Abstract
- The present work reports on the morphological influence of catalyst on oxygen reduction reaction (ORR). As a catalyst, Prussian blue analog structured nickel hexacyanoferrate (Ni-HCF) with two distinct morphologically controlled frameworks, viz. granular crystalline bulk film and rose-petal like structured thin film having smooth surface, are synthesized via controlled anodization route, and their morphological influence on the ORR is investigated. In addition, the influence of addition of carbon black, which is commonly used as catalytic dispersing support, is also studied on the catalytic mechanism for the ORR. Based on the hydrodynamic voltammetry of the electrocatalytic films on rotating disk electrode, the number of electrons involved in the reduction of an O-2 molecule, and the kinetic current density of the reaction are estimated. While the pristine Ni-HCF frameworks based catalyst, regardless of their morphology, demonstrates the direct reduction of O-2 with participation of 4 electrons, the frameworks when mixed with carbon black as support diverts the reduction via two steps with participation of 2 electrons at each step. A larger kinetic current density is, however, obtained in the case of granular crystalline bulk film of the Ni-HCF frameworks.
- URI
- https://www.sciencedirect.com/science/article/pii/S1572665718306301?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/120286
- ISSN
- 1572-6657; 1873-2569
- DOI
- 10.1016/j.jelechem.2018.09.033
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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