ZIF-8@ZIF-67 derived Fe–CoS2/CNT carbon polyhedron for enhanced electrocatalytic oxygen evolution reaction

Li, Weixin; Feng, Xinyao; Zeng, Xianghui; Gong, Cheng; Chen, Xiongwei; Li, Dongming; Zeng, Yuan; Wang, Xinmiao; Pan, Xinyu; Shi, Zhengxiao; Zhao, Lei

doi:10.1016/j.ijhydene.2023.08.039

Cited by 4 publications

(2 citation statements)

References 62 publications

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“…The features of the Tafel slope and EIS analysis strongly prove that CoS2@MoS2 exhibits fast catalytic kinetics and exceptional catalytic OER performance owing to the core-shell structure and strong chemical coupling at the CoS2@MoS2 interface. In comparison, the catalytic OER activity of the core-shell CoS2@MoS2 catalyst with a low overpotential is also superior to the reported results shown in Figure 4e [22,[51][52][53][54][55][56][57][58]. The kinetic behavior of the CoS2@MoS2 catalyst was further confirmed by active energy derived from the Arrhenius equation, and the related CV curves were measured at different temperatures of 25 °C, 35 °C, 45 °C, 55 °C, and 65 °C.…”

Section: Electrocatalytic Performancementioning

confidence: 58%

Section: Electrocatalytic Performancementioning

confidence: 59%

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Core–Shell CoS2@MoS2 with Hollow Heterostructure as an Efficient Electrocatalyst for Boosting Oxygen Evolution Reaction

Guo,

Xu,

Liu

et al. 2024

Molecules

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It is imperative to develop an efficient catalyst to reduce the energy barrier of electrochemical water decomposition. In this study, a well-designed electrocatalyst featuring a core–shell structure was synthesized with cobalt sulfides as the core and molybdenum disulfide nanosheets as the shell. The core–shell structure can prevent the agglomeration of MoS2, expose more active sites, and facilitate electrolyte ion diffusion. A CoS2/MoS2 heterostructure is formed between CoS2 and MoS2 through the chemical interaction, and the surface chemistry is adjusted. Due to the morphological merits and the formation of the CoS2/MoS2 heterostructure, CoS2@MoS2 exhibits excellent electrocatalytic performance during the oxygen evolution reaction (OER) process in an alkaline electrolyte. To reach the current density of 10 mA cm−2, only 254 mV of overpotential is required for CoS2@MoS2, which is smaller than that of pristine CoS2 and MoS2. Meanwhile, the small Tafel slope (86.9 mV dec−1) and low charge transfer resistance (47 Ω) imply the fast dynamic mechanism of CoS2@MoS2. As further confirmed by cyclic voltammetry curves for 1000 cycles and the CA test for 10 h, CoS2@MoS2 shows exceptional catalytic stability. This work gives a guideline for constructing the core–shell heterostructure as an efficient catalyst for oxygen evolution reaction.

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