期刊
SUSTAINABLE ENERGY & FUELS
卷 1, 期 3, 页码 636-643出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7se00043j
关键词
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资金
- Japan Society for the Promotion of Science (JSPS) [24107005]
- Advanced Catalytic Transformation Program for Carbon Utilization (ACTC) from Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [24107005] Funding Source: KAKEN
The application of the water oxidation reaction to extract electrons from water molecules is important for the future sustainable synthesis of useful chemicals such as hydrogen and organic compounds. Therefore, a cost-effective oxygen evolution reaction (OER) in alkaline, neutral or acidic solution is required, based on the use of catalysts incorporating earth abundant elements. This work demonstrates that beta-FeOOH(Cl) nanorod catalysts with high crystallinity and small size (an average diameter of 3 nm and a length of 15 nm) provided the best performance in the OER activity among Fe-based oxide and (oxy) hydroxide catalysts. The pristine beta-FeOOH(Cl) nanorods with the high crystallinity are realized by a new process enabling one-pot, fast, and room temperature synthesis, which is the key to forming colloidal suspensions of the highly crystallized pure-phase beta-FeOOH(Cl) nanorods. The versatility of this process also enabled doping of a wide variety of transition metals. Doping of Ni2+ (at 1.2 at%) improved the OER activity and shifted the threshold potential in the negative direction by 100 mV in an alkaline electrolyte, which was comparable to that of conventional IrOx colloidal nanoparticles.
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