ORCID Profile
0000-0003-3832-1216
Current Organisations
Jeonbuk National University
,
Hue Industrial College
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Publisher: Wiley
Date: 17-01-2023
Abstract: Rechargeable zinc‐air batteries (ZABs) are promising energy storage systems due to their low‐cost and safety. However, the working principle of ZABs is based on oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), which display sluggish kinetic and low stability. Herein, this work proposes a novel method to design a heterogeneous CoP/CoO electrocatalyst on mesopore nanobox carbon/carbon nanotube (CoP/CoO@MNC‐CNT) that enriched active sites and synergistic effect. Moreover, the well‐defined heterointerfaces could lower the energy barrier for intermediate species adsorption and promote OER and ORR electrochemical performances. The CoP/CoO@MNC‐CNT electrocatalyst presents a high half‐wave potential of 0.838 V for ORR and a small overpotential of 270 mV for OER. The ZABs‐based CoP/CoO@MNC‐CNT air‐cathode shows an open‐circuit voltage of 1.409 V, the long‐term cycle life of 500 h with a small voltage difference change of 7.7%. Additionally, the flexible ZABs exhibit highly mechanical stability, demonstrating their application potential in wearable electronic devices.
Publisher: Wiley
Date: 11-10-2023
Publisher: Elsevier BV
Date: 2022
Publisher: Wiley
Date: 04-01-2023
Abstract: The development of trifunctional electrocatalyst for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) with deeply understanding the mechanism to enhance the electrochemical performance is still a challenging task. In this work, the distorted metastable hybrid‐phase induced 1T′/1T Co,PSnS 2 nanosheets on carbon cloth (1T′/1T Co,PSnS 2 @CC) is prepared and examined. The density functional theoretical (DFT) calculation suggests that the distorted 1T′/1T Co,PSnS 2 can provide excellent conductivity and strong hydrogen adsorption ability. The electronic structure tuning and enhancement mechanism of electrochemical performance are investigated and discussed. The optimal 1T′/1T Co,PSnS 2 @CC catalyst exhibits low overpotential of ≈94 and 219.7 mV at 10 mA cm −2 for HER and OER, respectively. Remarkably, the catalyst exhibits exceptional ORR activity with small onset potential value (≈0.94 V) and half‐wave potential (≈0.87 V). Most significantly, the 1T′/1T Co,PSnS 2 ||Co,PSnS 2 electrolyzer required small cell voltages of ≈1.53, 1.70, and 1.82 V at 10, 100, and 400 mA cm −2 , respectively, which are better than those of state‐of‐the‐art Pt‐C||RuO 2 (≈1.56 and 1.84 V at 10 and 100 mA cm −2 ). The present study suggests a new approach for the preparation of large‐scalable, high performance hierarchical 3D next‐generation trifunctional electrocatalysts.
Publisher: Elsevier BV
Date: 08-2023
No related grants have been discovered for Quynh Phuong Ngo.