Construction of 2D heterostructure Fe2P–CoP2/MoOx nanosheets for efficient oxygen evolution reaction

Literature Information

Publication Date 2023-10-31
DOI 10.1039/D3CE00884C
Impact Factor 3.545
Authors

Guan Sheng, Yanghang Fang, Shuangyang Zhao, Ruilin Lyu, Huijun Song, Hui Jin, Hasmaliza Mohamad, Che Azurahanim Che Abudullah, Soorathep Kheawhom, Wei Shao, Ruilian Yin, Ahmad Azmin Mohamad



Abstract

The oxygen evolution reaction (OER) plays a pivotal role in diverse electrochemical conversion applications, such as water splitting and metal–air batteries. Nevertheless, the formation of several active sites in catalysts made of non-noble metals continues to encounter notable obstacles. To tackle this challenge, a 2D heterostructure catalyst composed of Fe2P–CoP2/MoOx nanosheets was designed. The cobalt molybdate (CoMoO4) nanosheets and their supported FeOOH nanoflakes were in situ transformed into 2D heterostructure Fe2P–CoP2/MoOx nanosheets via a simple hydrothermal and phosphorization process. Note that the 2D MoOx nanosheets significantly enhance the electrochemically active surface area (ECSA), and there is a synergistic effect between cobalt phosphide (CoP2) and iron phosphide (Fe2P) nanoparticles, improving the OER reaction activity. When the electrocatalyst was employed for the OER, the Fe2P–CoP2/MoOx nanosheets exhibit remarkable OER efficiency, reducing overpotentials to as low as 235 mV at a current density of 50 mA cm−2, accompanied by a Tafel slope of 33.32 mV dec−1, along with exceptional enduring stability. The synthesis of the 2D heterostructure Fe2P–CoP2–MoOx nanosheets and their remarkable OER performance represent substantial advancements in developing electrocatalysts that are productive and stable in sustainable energy conversion and storage applications.

Source Journal

CrystEngComm

CrystEngComm
CiteScore: 5.5
Self-citation Rate: 7.7%
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CrystEngComm is the forum for the design and understanding of crystalline materials. We welcome studies on the investigation of molecular behaviour within crystals, control of nucleation and crystal growth, engineering of crystal structures, and construction of crystalline materials with tuneable properties and functions. We publish hypothesis-driven research into… how crystal design affects thermodynamics, phase transitional behaviours, polymorphism, morphology control, solid state reactivity (crystal-crystal solution-crystal, and gas-crystal reactions), optoelectronics, ferroelectric materials, non-linear optics, molecular and bulk magnetism, conductivity and quantum computing, catalysis, absorption and desorption, and mechanical properties. Using Techniques and methods including… Single crystal and powder X-ray, electron, and neutron diffraction, solid-state spectroscopy, spectrometry, and microscopy, modelling and data mining, and empirical, semi-empirical and ab-initio theoretical evaluations. On crystalline and solid-state materials. We particularly welcome work on MOFs, coordination polymers, nanocrystals, host-guest and multi-component molecular materials. We also accept work on peptides and liquid crystals. All papers should involve the use or development of a design or optimisation strategy. Routine structural reports or crystal morphology descriptions, even when combined with an analysis of properties or potential applications, are generally considered to be outside the scope of the journal and are unlikely to be accepted.

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