Simultaneously efficient light absorption and charge separation in WO3/BiVO4 core/shell nanowire photoanode for photoelectrochemical water oxidation.
We report a scalably synthesized WO3/BiVO4 core/shell nanowire photoanode in which BiVO4 is the primary light-absorber and WO3 acts as an electron conductor. These core/shell nanowires achieve the highest product of light absorption and charge separation efficiencies among BiVO4-based photoanodes to date and, even without an added catalyst, produce a photocurrent of 3.1 mA/cm(2) under simulated sunlight and an incident photon-to-current conversion efficiency of ∼ 60% at 300-450 nm, both at a potential of 1.23 V versus RHE.
Department of Mechanical Engineering, Stanford University , Stanford, California 94305, United States.
Pratap M
PM
Rao
Lili
L
Cai
Chong
C
Liu
In Sun
IS
Cho
Chi Hwan
CH
Lee
Jeffrey M
JM
Weisse
Peidong
P
Yang
Xiaolin
X
Zheng