Characterization of Ag-loaded FeOOH/Cu2O as Photocathode for Photoelectrochemical and X-ray Techniques Analysis
Jei-Wen Lo1*, Chih-Ming Lin1, Hsin-Yi Lee2, Yan-Gu Lin2, Po-Yang Peng2
1Department of Applied Science, National Tsing Hua University, Hsinchu, Taiwan
2Materials Science Group, National Synchrotron Radiation Research Center, Hsinchu, Taiwan
* Presenter:Jei-Wen Lo,
We present a active photocathode for solar H2 production, consisting a stable P-type cuprous oxide (Cu2O) photoelectrode has been fabricated by direct galvanostatic electrodeposition of the Cu foil substrate. After by adding Ag nanoparticles cocatalysts helps to separate the photoinduced charge pairs by attracting electrons, to facilitate the interfacial electron transfer. Following to introduce a nanolayers of N-type Iron oxide-hydroxide (FeOOH) on the surface layer, then the p-n junction is beneficial protecting Cu2O from self-photo corrosion and providing short diffusion paths for electron-hole pairs. The crystalline, surface morphology, and structure of the FeOOH/Ag/Cu2O were characterized by XRD, SEM, and XAS. XAS finding confirmed XRD results that the copper element in FeOOH/Ag/Cu2O was Cu (I) instead of Cu (II). After Ag and FeOOH introducing, the Cu2O nanowires structure kept its integrity with no significant morphological change, which was beneficial for photoelectrochemical (PEC) performance applications. The improvement in PEC efficiency by introducing the Ag and FeOOH material can be regarded as a suitable hetero partner, it provides useful insights into the development of photoelectrode with water splitting.

Keywords: photoelectrochemical, cuprous oxide, Iron oxide-hydroxide