4 research outputs found
Boosting Charge Separation and Transfer by Plasmon-Enhanced MoS<sub>2</sub>/BiVO<sub>4</sub> p–n Heterojunction Composite for Efficient Photoelectrochemical Water Splitting
The poor separation
and significant recombination of electron–hole
pairs and slow transfer mobility of charge carriers limit the performance
of BiVO<sub>4</sub> for photoelectrochemical (PEC) water splitting.
To ameliorate the above problems, a novel integrated Ag-embedded MoS<sub>2</sub>/BiVO<sub>4</sub> p–n heterojunction ternary composite
electrode is fabricated and applied. Surface plasmon resonance (SPR)
of Ag nanoparticles (NPs) by the near-field electromagnetic enhancement
or abundant hot electrons injection and p–n heterojunction
of MoS<sub>2</sub>/BiVO<sub>4</sub> by the built-in electrical potential
synergistically boost the electron–hole pair separation, transfer
properties and suppress the recombination of the electron–hole
pairs. Consequently, the BiVO<sub>4</sub>−Ag−MoS<sub>2</sub> electrode among four of the BiVO<sub>4</sub>-based electrodes
achieves the largest photocurrent density of 2.72 mA cm<sup>–2</sup> at 0.6 V vs RHE, which is 2.44 times higher than that of pure BiVO<sub>4</sub> electrode (0.79 mA cm<sup>–2</sup>), and possesses
the largest IPCE of 51% at 420 nm. This work proposes a worthy design
strategy for a plasmon enhanced p–n heterojunction for efficient
PEC water splitting