In:
Inorganic Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 10, No. 16 ( 2023), p. 4725-4733
Abstract:
Recently, a super-active BiVO 4 –tartaric acid (C 4 H 6 O 6 ) PEC fuel cell with efficient charge and energy transfer paths has been reported. However, the detailed complexation mechanism between BiVO 4 and C 4 H 6 O 6 remains unclear. Herein, a series of theoretical calculations and experiments are conducted to gain deep insight into the complexation mechanism. The results show that the optimal metal complexation site (Bi 3+ ) of C 4 H 6 O 6 involved in the VB contribution of the BiVO 4 photoanode is crucial for significantly enhancing the PEC performance, which is beneficial for increasing the photoelectric conversion of BiVO 4 and the energy release of C 4 H 6 O 6 . The BiVO 4 –C 4 H 6 O 6 PEC fuel cell exhibits remarkable PEC performance with a current density of 13.75 mA cm −2 at 1.23 V vs. the reversible hydrogen electrode (RHE) under AM 1.5 G irradiation. The Bi 2 WO 6 –C 4 H 6 O 6 and CuWO 4 –C 4 H 6 O 6 PEC fuel cells with similar complexation sites and energy band configurations to the BiVO 4 –C 4 H 6 O 6 PEC fuel cell can also achieve improved PEC activity. This work provides an in-depth understanding of the complexation mechanism in the C 4 H 6 O 6 -based PEC fuel cell and can inspire the design of efficient PEC fuel cells.
Type of Medium:
Online Resource
ISSN:
2052-1553
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023