期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 7, 页码 6262-6268出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16749
关键词
oxygen evolution reaction (OER); silicon photoanode; local surface plasmon resonance (LSPR); gold nanoparticles; nickel nanoparticles
资金
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
- National Natural Science Foundation of China [61674152]
- Natural Science Foundation of Fujian Province of China [2017H6022, 2017J01130]
- Science and Technology Program of Xiamen City of China [3502Z20161223]
Ni catalyst is a low-cost catalyst for oxygen evolution reaction (OER) on silicon metal-insulator semi-conductor photoanode. We found that Au nanoparticles incorporated with Ni nanoparticles can enhance the OER activity and stability of Ni nanoparticles due to the local surface plasmon resonance (LSPR) effect of the Au nano particles. The efficiency of NiAu/TiO2/n-Si photoanode can be boosted at least three times under the illumination (100 mW/cm(2)) by LSPR effect of the Au nanoparticles. A small onset potential of 1.03 V versus reversible hydrogen electrode (overpotential, eta(0) = -0.20 V) and a current density of 18.80 mA/cm(2) at 1.23 V versus reversible hydrogen electrode can be obtained. The NiAu/TiO2/n-Si photoanode exhibits a high saturation current density of 35 mA/cm(2), which is greater than that of most of the state-of-the-art silicon photoanodes.
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