fig8

Advanced catalysis for efficient hydrogen production

Figure 8. Synergistic catalysis for H2 production. Schematic diagram of (A) energy band bending of catalyst and (B) carrier behavior within catalyst during piezo-photocatalysis. Figure A and B are quoted with permission from Han et al.[58]; (C) Experimental and simulated piezo-photocatalytic H2 production rate and selectivity of Pt/ZnIn2S4/BaTiO3 heterojunctions, and (D) corresponding H2 evolution mechanism. Figure C and D are quoted with permission from Wang et al.[59]; (E) Schematic illustration of the piezopotential switch mechanisms, and (F) corresponding H2 production rates under ultrasonication-light (U-L) and stirring-light irradiation (O-L) with the working current of 0.8 and 0.2 A, respectively. Figure E and F are quoted with permission from Jin et al.[61]; (G) Schematic representative of the synergistic pyro-photocatalytic water splitting over BaTiO3 photoanode, and (H) corresponding H2/O2 production under temperature fluctuation, light illumination, and an overpotential of 1.23 V vs. RHE. Figure G and H are quoted with permission from Guo et al.[63]; (I) Hydrogen evolution rates, (J) electrochemical impedance spectroscopy Nyquist plots, (K) photocurrent outputs, and (L) pyroelectric potential outputs of P(VDF-HFP)/CNT/CdS-Pt (P-H/C/CdS-Pt), P(VDF-HFP)/CdS-Pt (P-H/CdS-Pt), P(VDF-CTFE)/CNT/CdS-Pt (P-C/C/CdS-Pt), and P(VDF-HFP)/CNT/CdS-Pt (P-C/CdS-Pt). Figure I-L are quoted with permission from Dai et al.[7]; (M) Schematic representation of piezo-pyro-photocatalytic H2 production in the condition of magnetic field stimulation, full-spectrum light irradiation, and (N) corresponding H2 production rates of PVDF/Fe3O4/g-C3N4 (PVFC). Figure M and N are quoted with permission from Wei et al.[64]. RHE: Reversible hydrogen electrode; PVDF: polyvinylidene fluoride.

Microstructures
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