首页|Unravelling the role of the combined effect of metallic charge transfer channel and SiOx overlayer in the Zr/Si-Fe2O3:Au:SiOx nanorod arrays to boost photoelectrochemical water splitting

Unravelling the role of the combined effect of metallic charge transfer channel and SiOx overlayer in the Zr/Si-Fe2O3:Au:SiOx nanorod arrays to boost photoelectrochemical water splitting

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Hematite(а-Fe2O3)based photoanodes have been extensively studied due to various intriguing features that make them viable candidates for a photoelectrochemical(PEC)water splitting photoanode.Herein,we propose a Zr-doped Fe2O3 photoanode decorated with facilely spin-coated Au nanoparticles(NPs)and microwave-assisted attached Si co-doping in conjunction with a SiOx overlayer that displayed a remark-able photocurrent density of 2.01 mA/cm2 at 1.23 V vs.RHE.The kinetic dynamics at the photoelectrode/-electrolyte interface was examined by employing systematic electrochemical investigations.The Au NPs played a dual role in increasing PEC water splitting.First,the Schottky interface that was formed between Au NPs and Zr-Fe2O3 electrode ensured the prevention of electron flow from the photoanode to the metal,increasing the number of available charges as well as suppressing surface charge recombination.Second,Au extracted photoholes from the bulk of the Zr-Fe2O3 and transported them to the outer SiOx overlayer,while the SiOx overlayer efficiently collected the photoholes and promoted the hole injection into the electrolyte.Further,Si co-doping enhanced bulk conductivity by reducing bulk charge transfer resistance and improving charge carrier density.This study outlines a technique to design a metallic charge transfer path with an overlayer for solar energy conversion.

HematiteMicrowave attachmentAu nanoparticlesSiOx overlayerWater splitting

Tae Sik Koh、Periyasamy Anushkkaran、Love Kumar Dhandole、Mahadeo A.Mahadik、Weon-Sik Chae、Hyun Hwi Lee、Sun Hee Choi、Jum Suk Jang

展开 >

Division of Biotechnology,Safety,Environment and Life Science Institute,College of Environmental and Bioresource Sciences,Jeonbuk National University,Iksan 54896,Republic of Korea

Department of Integrative Environmental Biotechnology,College of Environmental and Bioresource Sciences,Jeonbuk National University,Iksan 54596,Republic of Korea

Extreme Materials Research Center,Korea Institute of Science and Technology(KIST),Seoul 02792,Republic of Korea

Daegu Center,Korea Basic Science Institute,Daegu 41566,Republic of Korea

Pohang Accelerator Laboratory,Pohang University of Science and Technology(POSTECH),Pohang 37673,Republic of Korea

展开 >

National Research Foundation of Korea(NRF)Grant funded by the Korean government(MSIT)National Research Foundation of Korea(NRF)Grant funded by the Korean government(MSIT)National Research Foundation of Korea(NRF)Grant funded by the Korean government(MSIT)GRDC(Global Research Development Center)Cooperative Hub Program through the National Research Foundation of Korea(NRF)funded

NRF-2021R1A2C1095669NRF-2021R1F1A1049366NRF-2023R1A2C1003088RS-2023-00258911

2024

10.1016/j.jechem.2023.12.001

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.90(3)
  • 35