Multifunctional photo-electrocatalysts of copper sulfides prepared via pulsed laser ablation in liquid: Phase formation kinetics and photo-electrocatalytic activity
- Begildayeva, Talshyn; Chinnadurai, Deviprasath; Lee, Seung Jun; Choi, Myong Yong
- Issue Date
- copper sulfide; electrocatalysis; methanol oxidation reaction; phase engineering; photoelectric process; pulsed laser ablation in liquid; water splitting
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.46, no.6, pp.8201 - 8217
- Journal Title
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Start Page
- End Page
- Designing a highly efficient and less expensive electrocatalyst for electrolyzers and fuel cells is of great importance to creating a sustainable future energy source. Herein, we applied a unique and extremely facile pulsed laser ablation in the liquid synthesis route for the fabrication of phase-engineered CuxSy nanospheres. The multifunctionality of these catalysts was assessed by examining the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and methanol oxidation reaction (MOR). As a result, low overpotentials of 390 mV (HER) and 440 mV (OER) were achieved for sulfur-rich and copper-rich samples in alkaline media, respectively. Furthermore, the high selectivity of Cu over methanol and the high number of electrochemically accessible active sites equal to 7.9 x 10(16) promoted the MOR with a current density of 28.3 mA/cm(2) at the vertex potential. It is worth emphasizing that in this research, we consider the electrocatalyst's initial electrocatalytic water decomposition function to gain a better understanding of the photoelectrocatalytic behavior. Using a beneficial photo-assisted electrochemical method, a high OER catalytic activity was obtained under light irradiation due to the large light absorption coefficients of the synthesized electrocatalysts, which facilitated electron transfer at the electrode-electrolyte interface.
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- 자연과학대학 > 화학과 > Journal Articles
- College of Medicine > Department of Medicine > Journal Articles
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