Abstract
Molybdenum trioxide (MoO 3) nanowire with unprecedentedly high aspect ratios (>200) and good crystallinity was prepared via decomposition of (NH 4) 6Mo 7O 24·4H 2O under a microwave-assisted hydrothermal (MH) process. The nanowire was orthorhombic MoO 3 with 50 nm in diameter and 10–12 μm in length. The conventional hydrothermal (CH) reaction required higher temperature and longer reaction times to produce one-dimensional MoO 3, yet its quality was lower. In the electrochemical hydrogen evolution reaction in a H 2SO 4 solution, MoO 3 nanowire from MH process showed much higher electrocatalytic activity than MoO 3 prepared from CH method and commercial bulk MoO 3 particles. The facile vectorial electron transport along the nanowire axis was considered to be responsible for the excellent electrocatalytic activity of the MH–MoO 3 nanowire.
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