2D Molybdenum Compounds for Electrocatalytic Energy Conversion

Abstract

The development of advanced nanomaterials is urgent for electrocatalytic energy conversion applications. Recently, 2D nanomaterial-derived heterogeneous electrocatalysts have shown great promise for both fundamental research and practical applications owing to their extremely high surfaceto-volume ratio and tunable geometric and electronic properties. Because of their unique electronic structure and physicochemical properties, molybdenum (Mo)-based 2D nanomaterials are emerging as one of the most attractive candidates among the nonprecious materials for electrocatalysts. This review provides a comprehensive overview of the recent advances in the synthesis and modulation of 2D Mo compounds for applications in electrocatalytic energy conversion. The categories based on different compositions and corresponding synthetic approaches of 2D Mo compounds are first introduced. Subsequently, various atomic/plane/synergistic engineering strategies, along with catalytic optimization in the electrochemical process that involves the cycles of water, carbon, and nitrogen, are discussed in detail. Finally, the current challenges and future opportunities for the development of 2D Mo-based electrocatalysts are proposed with the goal of shedding light on these promising 2D nanomaterials for electrocatalytic energy conversion.

Screening Nickel‐Doped Mo2C Nanorod Arrays for Ultrastable and Efficient Hydrogen Evolution over a Wide pH Range

“…[4] Numerous transition metal catalysts have been reported as the promising star of HER catalyst. [5][6][7] Among them, molybdenum carbide has been received much attention because of its similar d-band electronic structure compared with Pt-group metals and a wide range of pH applicability. [8][9] However, as a member of transition metal carbide family, molybdenum carbide exhibits unsatisfactory negative value of hydrogen binding energy (ΔG H *), which restraints greatly desorption kinetics in HER process.…”

Electrochemical CO2 Reduction over a MoS2/Mo Electrode

“…Molybdenum disulfide (MoS 2 ), a well-known two-dimensional (2D)-layered transition metal dichalcogenide, has been extensively studied for various applications, including optoelectronic devices, energy storage, and catalysis [1][2][3][4][5][6][7][8][9]. In particular, MoS 2 exhibits a high activity for photocatalyzed and electrocatalyzed hydrogen evolution reactions (HER) [4][5][6][7][8]10,11].…”

Boron/Nitrogen-Induced Surface Environment Modulation for Favorable Phase and Valence toward Efficient Oxygen Evolution

“…Hence, the O ads environment on the surfaces is important for regulating the intermediate adsorption behaviors. Particularly, for these intrinsically inert metal oxide catalysts, such as molybdenum oxides, through the rational regulation on OLSME by using anionic modulators, the desired phases and valences can be produced on the surfaces, which is crucial for promoting OER performance. − Unfortunately, the systematic investigation has been lacking until now.…”