Pd Nanoparticles Coupled to WO2.72Nanorods for Enhanced Electrochemical Oxidation of Formic Acid.
We synthesize a new type of hybrid Pd/WO2.72structure with 5 nm Pd nanoparticles (NPs) anchored on 50 × 5 nm WO2.72nanorods. The strong Pd/WO2.72coupling results in the lattice expansion of Pd from 0.23 to 0.27 nm and the decrease of Pd surface electron density. As a result, the Pd/WO2.72shows much enhanced catalysis toward electrochemical oxidation of formic acid in 0.1 M HClO4; it has a mass activity of ∼1600 mA/mgPdin a broad potential range of 0.4-0.85 V (vs RHE) and shows no obvious activity loss after a 12 h chronoamperometry test at 0.4 V. Our work demonstrates an important strategy to enhance Pd NP catalyst efficiency for energy conversion reactions.
Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
Zheng
0000-0003-3953-7772
Z
Xi
Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
Daniel P
DP
Erdosy
Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
Adriana
A
Mendoza-Garcia
Department of Chemistry, Dalhousie University , Halifax, Nova Scotia B3H 4R2, Canada.
Paul N
PN
Duchesne
Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
Junrui
J
Li
Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
Michelle
M
Muzzio
School of Materials Science and Engineering, Huazhong University of Science and Technology , Wuhan, Hubei 430074, People's Republic of China.
Qing
0000-0003-4807-030X
Q
Li
Department of Chemistry, Dalhousie University , Halifax, Nova Scotia B3H 4R2, Canada.
Peng
P
Zhang
Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
Shouheng
0000-0002-4051-0430
S
Sun
Palladium; electrocatalysis; formic acid oxidation; nanohybrids; tungsten oxide