TY - JOUR
T1 - Identification of Active Edge Sites for Electrochemical H2 Evolution from MoS2 Nanocatalysts
AU - Jaramillo, Thomas
AU - Jørgensen, Kristina Pilt
AU - Bonde, Jacob
AU - Nielsen, Jane Hvolbæk
AU - Horch, Sebastian
AU - Chorkendorff, Ib
PY - 2007
Y1 - 2007
N2 - The identification of the active sites in heterogeneous catalysis requires a combination of surface sensitive methods and reactivity studies. We determined the active site for hydrogen evolution, a reaction catalyzed by precious metals, on nanoparticulate molybdenum disulfide (MoS2) by atomically resolving the surface of this catalyst before measuring electrochemical activity in solution. By preparing MoS2 nanoparticles of different sizes, we systematically varied the distribution of surface sites on MoS2 nanoparticles on Au(111), which we quantified with scanning tunneling microscopy. Electrocatalytic activity measurements for hydrogen evolution correlate linearly with the number of edge sites on the MoS2 catalyst.
AB - The identification of the active sites in heterogeneous catalysis requires a combination of surface sensitive methods and reactivity studies. We determined the active site for hydrogen evolution, a reaction catalyzed by precious metals, on nanoparticulate molybdenum disulfide (MoS2) by atomically resolving the surface of this catalyst before measuring electrochemical activity in solution. By preparing MoS2 nanoparticles of different sizes, we systematically varied the distribution of surface sites on MoS2 nanoparticles on Au(111), which we quantified with scanning tunneling microscopy. Electrocatalytic activity measurements for hydrogen evolution correlate linearly with the number of edge sites on the MoS2 catalyst.
U2 - 10.1126/science.1141483
DO - 10.1126/science.1141483
M3 - Journal article
C2 - 17615351
SN - 0036-8075
VL - 317
SP - 100
EP - 102
JO - Science
JF - Science
IS - 5834
ER -