한국재료학회지 제32권 제5호 (p.237-242)

Rational Design of Binder-Free Fe-Doped CuCo(OH)2 Nanosheets for High-Performance Water Oxidation

키워드 :
Fe-doping,CuCo(OH)2,oxygen evolution reaction,nanosheets,electrocatalyst.

목차

Abstract
1. Introduction
2. Experimental
   2.1. Synthesis of Fe-doped CuCo(OH)2
   2.2. Physical characterization
   2.3. Electrochemical measurements
3. Results and discussion
4. Effect of Fe-doping
5. Conclusion
Acknowledgment
References

초록

Designing and producing a low-cost, high-current-density electrode with good electrocatalytic activity for the oxygen evolution reaction (OER) is still a major challenge for the industrial hydrogen energy economy. In this study, nanostructured Fe-doped CuCo(OH)2 was discovered to be a precedent electrocatalyst for OER with low overpotential, low Tafel slope, good durability, and high electrochemically active surface sites at reduced mass loadings. Fe-doped CuCo(OH)2 nanosheets are made using a hydrothermal synthesis process. These nanosheets are clumped together to form a highly open hierarchical structure. When used as an electrocatalyst, the Fe-doped CuCo(OH)2 nanosheets required an overpotential of 260 mV to reach a current density of 50 mA cm−2. Also, it showed a small Tafel slope of 72.9 mV dec−1, and superior stability while catalyzing the generation of O2 continuously for 20 hours. The Fe-doped CuCo(OH)2 was found to have a large number of active sites which provide hierarchical and stable transfer routes for both electrolyte ions and electrons, resulting in exceptional OER performance.