电催化剂
电化学
过渡金属
碲
催化作用
无机化学
插层(化学)
剥脱关节
材料科学
析氧
化学
石墨烯
钼
钨
纳米技术
物理化学
电极
冶金
有机化学
作者
Jan Luxa,Pavel Vosecký,Vlastimil Mazánek,David Sedmidubský,Martin Pumera,Petr Lazar,Zdeněk Sofer
标识
DOI:10.1021/acscatal.7b02080
摘要
The layered compounds and especially transition-metal dichalcogenides are at the forefront of current research on electrocatalytic materials. Despite the fact that electrocatalytical properties of molybdenum and tungsten disulfides are well-known, their tellurium analogues are significantly less explored. Here we show an effective method for MoTe2 and WTe2 chemical exfoliation based on alkali metal intercalation and subsequent reaction with water. The as-synthesized and exfoliated tellurides were characterized in detail and investigated for potential application in electrocatalysis. The inherent electrochemical activity related to both cation and anion was observed. This is dominantly related to the oxidation tendency of tellurium. The MoTe2 and WTe2 show significantly contrasting properties toward the hydrogen evolution reaction, where MoTe2 shows highly increased HER activity with little dependence on electrochemical treatment, whereas WTe2 shows slightly worse improvement and strong dependence on the electrochemical treatment. In particular, the exfoliated MoTe2 exhibits improved electrocatalytic activity for hydrogen evolution reaction and possesses a huge application potential.
科研通智能强力驱动
Strongly Powered by AbleSci AI