Synthesis of nanostructured clean surface molybdenum carbides on graphene sheets as efficient and stable hydrogen evolution reaction catalysts

Abstract

Small size molybdenum carbides (2.5 nm for MoC and 5.0 nm for Mo2C) with clean surface on graphene were prepared for efficient and stable hydrogen evolution reaction catalysts.

Enhanced hydrogen evolution reaction catalyzed by carbon‐rich Mo4.8Si3C0.6/C/SiC nanocomposites via a PDC approach

“…Among them, Mo‐based compounds, including Mo 2 C, MoN, MoP, and MoS 2 have been widely explored as effective HER electrocatalysts due to their Pt‐like electrochemical behaviors. Subsequently, to expose more active sites and improve the intrinsic electronic conductivity of Mo‐based compounds, various methods have been applied to form unique nanostructures with enriched porosity, and to introduce conductive supports, such as carbon nanosheets, carbon nanotubes (CNTs), and reduced graphene oxide (RGO) …”

Facile synthesis of high surface area molybdenum carbide nanoparticles

“…More recently, it was shown that the TMC, molybdenum carbide, may be an efficient electrocatalyst because of its combination of structural and electronic properties . The hydrogen evolution reaction (HER) using this TMC as a catalyst is of particular interest.…”

Universal Strategy to Fabricate a Two-Dimensional Layered Mesoporous Mo2C Electrocatalyst Hybridized on Graphene Sheets with High Activity and Durability for Hydrogen Generation

“…20,37,38 Graphene is one of the excellent carriers 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 3 because of its superior electro-conductivity, large surface area, and high chemical stability. So far, Mo 2 C-based catalysts, such as np-Mo 2 C nanowires, 37 porous Mo 2 C nanorods, 35 Mo 2-x Fe x C, 34 Mo 2 C/CNT-GR 20 and etc, have been demonstrated to exhibit high activity towards hydrogen evolution.…”

“…Meanwhile, considerable studies suggested that the HER performance of molybdenum carbide-based materials depended on their small grain size of molybdenum carbides, large surface area, and highly dispersed distribution of molybdenum carbides nanoparticles, which were closely associated with their synthesis method. 31,38 Generally speaking, chemical vapor deposition (CVD) and high temperature pyrolysis of precursors are most common preparation routes. [39][40][41][42] However, during these processes, some harmful gases such as CO, C 2 H 6 or CH 4 are commonly used in the synthesis, which are harmful to the environment and the residual chars may cover the catalytic active sites.…”