Cobalt Iron-Phosphorus Synthesized by Electrodeposition as Highly Active and Stable Bifunctional Catalyst for Full Water Splitting
- Authors
- Yoon, Sanghwa; Kim, Jiwon; Lim, Jae-Hong; Yoo, Bongyoung
- Issue Date
- Apr-2018
- Publisher
- Electrochemical Society, Inc.
- Keywords
- HYDROGEN EVOLUTION REACTION; LAYERED DOUBLE HYDROXIDE; ELECTROCATALYSTS; OXIDATION; PHOSPHIDE; NICKEL; FILMS; Bifunctional Catalyst; Cobalt Iron-Phosphorus; Electrodeposition
- Citation
- Journal of the Electrochemical Society, v.165, no.5, pp.H271 - H276
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of the Electrochemical Society
- Volume
- 165
- Number
- 5
- Start Page
- H271
- End Page
- H276
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/8035
- DOI
- 10.1149/2.1221805jes
- ISSN
- 0013-4651
- Abstract
- Electrochemical water splitting is a promising method for sustainable energy conversion without environmental contamination. Developing active, stable, and low-cost electrocatalysts is important for practical applications with requirements such as scalability and durability. Herein, an efficient method for the electrodeposition of high-activity cobalt iron-phosphorus (CoxFe1-x-P) films as bi-functional electrocatalysts is presented. For films with a cobalt/iron atomic ratio of 1.07, the electrodeposited CoxFe1-x-P films showed outstanding electrocatalytic performance for both the H-2 and O-2 evolution reactions (HER and OER, respectively). In the HER, the overpotential and Tafel slope of the CoxFe1-x-P film on the copper plate were 169 mV at 10 mA/cm(2) and 56.9 mV/dec, respectively. In the case of the OER, the CoxFe1-x-P film on dendritic copper exhibited superior performance with an overpotential of 290 mV and a Tafel slope of 39.2 mV/dec. In the two-electrode system consisting of CoxFe1-x-P film on the copper plate without (HER) and with dendritic copper (OER) for full water splitting, the electrodes exhibited a low overpotential of 1.64 V at 10 mA/cm(2) and excellent long-term stability over several days under alkaline conditions. (C) 2018 The Electrochemical Society.
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