In situ Engineering of Hollow Porous Mo ₂ C@C Nanoballs Derived From Giant Mo-Polydopamine Clusters as Highly Efficient Electrocatalysts for Hydrogen Evolution.

ABSTRACT: Low-cost and highly effective catalysts are crucial to the electrocatalytic hydrogen evolution reaction (HER). Among non-noble catalysts, molybdenum carbides are promising candidates because of their high reserves, stability, low cost, and structural diversity. In this work, we report a simple method to fabricate a hollow porous Mo₂C@C nanoball through a hydrothermal preparation process of molybdenum precursors at high temperatures. Specifically, we have combined interfacial polymerization and the chelation effect to synthesize the Mo-polydopamine (Mo-PDA) precursor. As a result, Mo₂C@C-3 only requires an ultralow Tafel slope (~55 mV dec^-1) and low overpotential (η₅₀ ≈ 167 mV) in a 0.5 M H₂SO₄ solution with long-term cycling

SUBMITTER: Liu S 

PROVIDER: S-EPMC7154172 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature