| 학회 |
한국재료학회 |
| 학술대회 |
2019년 봄 (05/15 ~ 05/17, 평창 알펜시아 리조트) |
| 권호 |
25권 1호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
An Earth-Abundant, Amorphous Cobalt-Iron-Borate (Co-Fe-Bi) Prepared on Ni Foam as Highly Efficient and Durable Electrocatalysts for Oxygen Evolution |
| 초록 |
The rational designing of Earth-abundant, low-cost and efficient oxygen evolution reaction electrocatalysts is prerequisite to develop the alternative sustainable energy sources. In this work, we demonstrate the development of a highly efficient and durable electrocatalyst based on an amorphous Co-Fe-Bi directly grown on three-dimensional nickel foam via a facile solution approach. Co-Fe-Bi electrocatalysts on nickel foam exhibits an overpotential of ~ 307 mV to achieve the geometrical current density of 10 mA cm-2, a low Tafel slope of ~ 68.6 mV dec-1 and outstanding durability for 40 h at a mass loading of 1.2 mg cm-2, which is superior to those of borate-based electrocatalysts reported in the literature. This remarkable preliminary electrocatalytic performance in Co-Fe-Bi originates from the synergistic influence of unique binder-free ultra-thin nanosheets on the three dimensional porous structure, amorphous nature of multimetal-metalloid complex with highly abundant catalytically active sites and high conductivity of nickel foam. This work holds a great promise in the design and development of highly efficient and durable electrocatalysts at a large-scale based on an amorphous bimetallic borate nanosheets using a facile one-step solution process. |
| 저자 |
Umesh Suryawanshi1, Jin Hyeok Kim2
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| 소속 |
11Department of Materials Science and Engineering and Optoelectronics Convergence Research center, 2Chonnam National Univ. |
| 키워드 |
Co-Fe-Bi; Nanosheets; Electrocatalysts; Oxygen evolution reaction; one-step solution process.
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| E-Mail |
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