3D cross-linked BiOI decorated ZnO/CdS nanorod arrays: A cost-effective hydrogen evolution photoanode with high photoelectrocatalytic activity

Multifunctional WO3/NiCo2O4 heterojunction with extensively exposed bimetallic Ni/Co redox reaction sites for efficient photoelectrochemical water splitting

“…As displayed in Figure S3, it can be observed for bare WO 3 that only positive slopes are shown, demonstrating n‐type semiconductor characteristics of WO 3 . After the combination of WO 3 and NiCo 2 O 4 , it can be observed that the coexistence of positive and negative slopes, that is, a raised peak appears, which proves again that the formation of WO 3 /NiCo 2 O 4 p‐n heterojunction [59] …”

“…After the combination of WO 3 and NiCo 2 O 4 , it can be observed that the coexistence of positive and negative slopes, that is, a raised peak appears, which proves again that the formation of WO 3 /NiCo 2 O 4 p-n heterojunction. [59] The electrochemical impedance spectra (EIS) is applied to investigate the cause of the enhanced performances of WO 3 / NiCo 2 O 4 heterojunction and the change of the water oxidation kinetics at the interface between the electrode and the electrolyte, [56] and the corresponding equivalent circuit diagram is also inserted in Figure 8. Here, R pt and R s notes the charge transfer resistance of Pt/electrolyte interface as well as the electrochemical system's series resistance, respectively.…”

Preparation and photoelectrochemical properties of BiFeO3/BiOI composites

“…10,11 Accordingly, BiOI can be used to construct a heterojunction structure to improve the PEC properties of materials. [12][13][14][15] For example, Liu et al 13 constructed a BiOI/BiPO 4 p-n heterojunction structure via two-step electrodeposition and obtained an enhanced photocurrent density of 2.5 mA cm À2 , which is twice that of bare BiOI and nearly 20 times higher than that of pure BiPO 4 . Ye et al 15 employed BiOI to decorate ZnO/CdS nanorod arrays to overcome the problem of photocorrosion, and consequently, a long-term stability over 6000 s and a high photocurrent density of 3.04 mA cm À2 (1.75 times that of the ZnO/CdS photoanode) were achieved.…”

Oxygen Vacancies Induced Plasmonic Effect for Realizing Broad‐Spectrum‐Driven Photocatalytic H2 Evolution over an S‐Scheme CdS/W18O49 Heterojunction

“…The peaks located at 411.7 eV and 404.9 eV belongs to Cd 3d 3/2 and Cd 3d 5/2 , respectively [35] . The S 2p spectra (Figure 2b) can be fitted into two peaks with binding energies of 161.2 eV and 162.5 eV, which are ascribed to S 2p 5/2 and S 2p 3/2 [36] . As for W 18 O 49 , the main peaks in the W 4f of XPS spectra with binding energies of at 35.8 eV and 37.6 eV belong to W 4f 7/2 and W 4f 5/2 of W 6+ state, while the other two peaks are corresponding to W 5+ state (Figure 2c) [37] .…”