Self‐supporting Atmosphere‐Assisted Synthesis of 1D Mo₂C‐based Catalyst for Efficient Hydrogen Evolution

Abstract

One‐dimensional materials exhibit fascinating properties in electrocatalytic applications but their fabrication faces the challenge of tedious and complicated operations. We have developed a bottom‐up strategy to construct a 1D metal carbide catalyst (Mo2C@NC) consisting of ultrafine Mo2C nanoparticles embedded within nitrogen‐doped carbon layers by simply calcining a mixture of ammonium molybdate, urea and melamine. Experimental results and thermodynamic calculations demonstrate that the retainable pyrolysis‐generated self‐supporting atmosphere plays a crucial role in the crystalline phase and morphology of materials. When functioned as an electrocatalyst for the hydrogen evolution reaction (HER), the achieved Mo2C@NC presents an excellent catalytic activity as well as outstanding stability. This work could shed fresh light onto the facile synthesis of effective HER catalysts with 1D nanostructure.

Ruthenium Nanoclusters and Single Atoms on α‐MoC/N‐Doped Carbon Achieves Low‐Input/Input‐Free Hydrogen Evolution via Decoupled/Coupled Hydrazine Oxidation

“…The sintering temperature played a crucial role in obtaining the desired samples. [19] The results from Figures S2-4 indicate that all the samples keep the similar morphology and structure, while 800 °C is suitable to obtain the desired cubic α-MoC phase. [20] The obtained intermediates maintained the similar nanowire structure, as depicted in Figure S4A-C.…”

“…Then, the melamine was employed as carbon source and reductive agent to produce the MoC x ‐based intermediates . The sintering temperature played a crucial role in obtaining the desired samples [19] . The results from Figures S2–4 indicate that all the samples keep the similar morphology and structure, while 800 °C is suitable to obtain the desired cubic α‐MoC phase [20] .…”

Experimental and DFT studies of flower-like Ni-doped Mo2C on carbon fiber paper: A highly efficient and robust HER electrocatalyst modulated by Ni(NO3)2 concentration

“…The transition-metal-based compounds such as chalcogenides, phosphides, nitrides, and carbides have been investigated for electrochemical hydrogen evolution. Among them, transition-metal carbides (TMCs) known for their high corrosion resistance and chemical and mechanical stability, such as WC [18], TaC [19], and Mo 2 C [20][21][22][23], have demonstrated excellent electrochemical catalytic performance. They have unique electronic conductivity in various electrolyte mediums with a broad range of pH values.…”