The synergistic effect of surface and bulk O vacancies in a WO₃ photoanode to advance carrier separation and light harvesting for photoelectrochemical water splitting

Abstract

It is critical to fabricate a photoanodes with the virtues of high carriers separation efficiency and light harvesting for reducing the recombination of carriers and enhancing the utilization of solar...

Regulating a Zn/Co bimetallic catalyst in a metal–organic framework and oxyhydroxide for improved photoelectrochemical water oxidation

“…This demonstrates that the α-Fe 2 O 3 film possesses stronger binding ability to oxygen atoms affected with ZnCo-ZIF catalysts, which favors electron transfer. 40 As shown in Fig. 3e and f, the Zn 2p (Zn 2p 3/2 : 1022.3 eV; Zn 2p 1/2 : 1045.5 eV) and Co 2p (Co 2p 3/2 : 781.1 eV; Co 2p 1/2 : 796.7 eV) spectra are analysed to further prove the existence of Zn and Co in the α-Fe 2 O 3 photoanodes.…”

“…This demonstrates that the α-Fe 2 O 3 film possesses stronger binding ability to oxygen atoms affected with ZnCo-ZIF catalysts, which favors electron transfer. 40 As shown in Fig. 3e and f 41,42 To optimize the PEC-WS performance, a screening experiment of the content for ZnCo-ZIF catalysts is conducted and the catalyst thickness is regulated by varying the immersion time (Fig.…”

The Positive Versus Negative Effects of Defect Engineering for Solar Water Splitting: A Review

“…[ 102 ] These changes can significantly affect the catalytic performance of a photocatalyst. Metal oxides such as WO 3 , [ 103 ] ZnO, [ 104 ] and TiO 2 [ 105 ] can form O defects through annealing. Xu et al.…”

“…[102] These changes can significantly affect the catalytic performance of a photocatalyst. Metal oxides such as WO 3 , [103] ZnO, [104] and TiO 2 [105] can form O defects through annealing. Xu et al [106] introduced O vacancies onto the surface of Fe 2 O 3 using an N 2 annealing process (Figure 5a).…”