TY - JOUR

T1 - Selenium-doped mixed metal oxide nanoparticles decorated on g-C3N4 and MXene sheets as promising bifunctional oxygen electrocatalysts for rechargeable Zn–air batteries

AU - Rastgoo-Deylami, Mohadese

AU - Esfandiar, Ali

AU - Толстой, Валерий Павлович

PY - 2024/3/26

Y1 - 2024/3/26

N2 - The design of bifunctional electrocatalysts to conduct an appropriate oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) for high-performance zinc–air batteries is one of the most important challenges for sustainable energy storage devices. Herein, a novel composition of a bifunctional electrocatalyst including a selenium-doped cobalt iron mixed metal oxide decorated on sulfur-doped g-C3N4 and Ti3C2Tx, SeCF-MMO/SgCN:MX, is prepared. The mixed metal oxide including cobalt and iron, doped with selenium, presents good OER capability while the synergetic effect between sulfur-doped g-C3N4 and Ti3C2Tx (x = OH, F, O) leads to an enhanced ORR capability of the mentioned bifunctional electrocatalyst. The presence of MXene and the 3D morphology of the SeCF-MMO particles during the calcination process led to enhanced active surface area and electrical conductivity of the final composite. The polarization between OER and ORR, ΔE, for the SeCF-MMO/SgCN:MX sample is lower (0.70 V) than those of electrocatalysts previously reported. Furthermore, the fabricated zinc–air battery presents a good power density of 140 mW cm−2 with a small gap between charge and discharge, 0.85 V, and good stability. Moreover, the solid-state zinc–air battery presents appropriate performances at different states of bending. The superior performance of the SeCF-MMO/SgCN:MX sample is mainly attributed to the high conductivity of the optimized Ti3C2Tx-g-C3N4 composite and the synergistic interplay facilitated by the selenium-doped cobalt iron mixed metal oxide. This approach heralds a novel class of bifunctional nanostructures with promising prospects for applications in electrocatalysis and zinc–air battery technologies.

AB - The design of bifunctional electrocatalysts to conduct an appropriate oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) for high-performance zinc–air batteries is one of the most important challenges for sustainable energy storage devices. Herein, a novel composition of a bifunctional electrocatalyst including a selenium-doped cobalt iron mixed metal oxide decorated on sulfur-doped g-C3N4 and Ti3C2Tx, SeCF-MMO/SgCN:MX, is prepared. The mixed metal oxide including cobalt and iron, doped with selenium, presents good OER capability while the synergetic effect between sulfur-doped g-C3N4 and Ti3C2Tx (x = OH, F, O) leads to an enhanced ORR capability of the mentioned bifunctional electrocatalyst. The presence of MXene and the 3D morphology of the SeCF-MMO particles during the calcination process led to enhanced active surface area and electrical conductivity of the final composite. The polarization between OER and ORR, ΔE, for the SeCF-MMO/SgCN:MX sample is lower (0.70 V) than those of electrocatalysts previously reported. Furthermore, the fabricated zinc–air battery presents a good power density of 140 mW cm−2 with a small gap between charge and discharge, 0.85 V, and good stability. Moreover, the solid-state zinc–air battery presents appropriate performances at different states of bending. The superior performance of the SeCF-MMO/SgCN:MX sample is mainly attributed to the high conductivity of the optimized Ti3C2Tx-g-C3N4 composite and the synergistic interplay facilitated by the selenium-doped cobalt iron mixed metal oxide. This approach heralds a novel class of bifunctional nanostructures with promising prospects for applications in electrocatalysis and zinc–air battery technologies.

KW - Zn–air batteries

KW - electrocatalysts

UR - https://www.mendeley.com/catalogue/a47e4908-8670-3f35-af7d-5470710cbbce/

U2 - 10.1039/d3se01419c

DO - 10.1039/d3se01419c

M3 - Article

VL - 8

SP - 2038

EP - 2049

JO - Sustainable Energy and Fuels

JF - Sustainable Energy and Fuels

SN - 2398-4902

IS - 9

ER -