研究目的
Investigating the photoelectrochemical activity and stability of a porous Ni-O/Ni/Si photoanode for efficient water splitting.
研究成果
The porous Ni-O/Ni/Si photoanode demonstrated superior PEC activity with an onset potential of 0.93 VRHE, a photocurrent of 39.7 mA cm?2 at 1.23 VRHE, and an energy conversion efficiency of 3.2%, along with excellent stability over 100 hours. The study provides a simple method to obtain a porous Ni-O catalyst on Ni/Si, enhancing PEC water splitting efficiency.
研究不足
The study focuses on the PEC activity and stability of the porous Ni-O/Ni/Si photoanode but does not extensively explore the scalability of the fabrication process or the performance under varying environmental conditions.
1：Experimental Design and Method Selection:
The study involved the preparation of a porous Ni-O/Ni/Si photoanode through electrodeposition of Ni-S on Ni/Si followed by an activation process to convert Ni-S to Ni-O while retaining the porous structure.
2：Sample Selection and Data Sources:
Single-crystalline p-Si wafers were doped with phosphorus to form a pn+ junction, followed by the application of an anti-reflection SiNx layer and fritted Ag bar line.
3：List of Experimental Equipment and Materials:
Equipment included a sputtering system for Ni layer deposition, electrochemical workstation for Ni-S electrodeposition, and XPS for surface analysis. Materials included NiSO4, thiourea, and NaOH solution.
4：Experimental Procedures and Operational Workflow:
The process involved Ni sputtering on Si, electrodeposition of Ni-S, activation to Ni-O, and characterization through SEM, XPS, and PEC measurements.
5：Data Analysis Methods:
PEC activity was assessed through J-V curves, EIS for electrode kinetics, and XPS for surface composition analysis.
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