“…In the case of Au/Ce 0.75 -La 0.25 nanorod catalyst, catalysts with low gold content could also exhibits high activity at low temperature, which would promote the progress of supported gold catalyst. The results indicated that supported gold catalysts prepared by deposition-precipitation with pH value of 6–10 for HAuCl 4 solution could have high catalytic activity due to small diameter of gold nanoparticles, corresponding with the references [8–10]. Fig.…”
Section: Resultssupporting
confidence: 75%
“…It has become an increasingly severe problem on air pollution. Catalytic CO oxidation has been one of the most effective solutions for CO removal to solve such serious environmental problem [1–8]. It has also received a great deal attention recently by the scientific community in the fields of the pollution control devices for vehicle exhaust purification, indoor air cleaning, and low-temperature CO sensors [6–10].…”
Section: Introductionmentioning
confidence: 99%
“…As one of the most important rare earth oxides, CeO 2 has been widely used in three-way catalysts as an efficient catalyst support due to its unique physical and chemical properties [6, 8, 15, 17]. CeO 2 has an excellent oxygen storage and release capacity due to the ability to switch Ce 4+ /Ce 3+ , which makes CeO 2 become an active oxide component of various oxidation catalysts used in diverse redox catalytic reactions [17–32].…”
One-dimensional (1D) Ce-La nanorods with different La contents (Ce and La in the molar ratio of 1:0, 3:1, 1:1, 1:3, and 0:1) were synthesized by hydrothermal process. Au/Ce-La nanorod catalysts were obtained by a modified deposition-precipitation method. The samples were characterized by N2 adsorption-desorption (BET), ICP, X-ray diffraction (XRD), SEM, TEM, EDX, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), and temperature-programmed reduction (H2-TPR). It revealed that La existed as LaOx in the 1D nanorods. The catalysis results demonstrated that the mixed binary Ce-La nanorod oxides could be a good support for gold catalysts. The contents of La had an important influence on the catalytic performance of Au/Ce-La nanorod catalysts. Among the catalysts, when the Ce/La molar ratio was 3:1, the 1.0%Au/Ce0.75-La0.25 nanorods pretreated at 300 °C showed the best activity among the catalysts for CO oxidation, which could convert CO completely at 30 °C. The catalysts also performed high temperature resistance and good stability for CO oxidation at the reaction temperatures of 40, 70, and 200 °C.
“…In the case of Au/Ce 0.75 -La 0.25 nanorod catalyst, catalysts with low gold content could also exhibits high activity at low temperature, which would promote the progress of supported gold catalyst. The results indicated that supported gold catalysts prepared by deposition-precipitation with pH value of 6–10 for HAuCl 4 solution could have high catalytic activity due to small diameter of gold nanoparticles, corresponding with the references [8–10]. Fig.…”
Section: Resultssupporting
confidence: 75%
“…It has become an increasingly severe problem on air pollution. Catalytic CO oxidation has been one of the most effective solutions for CO removal to solve such serious environmental problem [1–8]. It has also received a great deal attention recently by the scientific community in the fields of the pollution control devices for vehicle exhaust purification, indoor air cleaning, and low-temperature CO sensors [6–10].…”
Section: Introductionmentioning
confidence: 99%
“…As one of the most important rare earth oxides, CeO 2 has been widely used in three-way catalysts as an efficient catalyst support due to its unique physical and chemical properties [6, 8, 15, 17]. CeO 2 has an excellent oxygen storage and release capacity due to the ability to switch Ce 4+ /Ce 3+ , which makes CeO 2 become an active oxide component of various oxidation catalysts used in diverse redox catalytic reactions [17–32].…”
One-dimensional (1D) Ce-La nanorods with different La contents (Ce and La in the molar ratio of 1:0, 3:1, 1:1, 1:3, and 0:1) were synthesized by hydrothermal process. Au/Ce-La nanorod catalysts were obtained by a modified deposition-precipitation method. The samples were characterized by N2 adsorption-desorption (BET), ICP, X-ray diffraction (XRD), SEM, TEM, EDX, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), and temperature-programmed reduction (H2-TPR). It revealed that La existed as LaOx in the 1D nanorods. The catalysis results demonstrated that the mixed binary Ce-La nanorod oxides could be a good support for gold catalysts. The contents of La had an important influence on the catalytic performance of Au/Ce-La nanorod catalysts. Among the catalysts, when the Ce/La molar ratio was 3:1, the 1.0%Au/Ce0.75-La0.25 nanorods pretreated at 300 °C showed the best activity among the catalysts for CO oxidation, which could convert CO completely at 30 °C. The catalysts also performed high temperature resistance and good stability for CO oxidation at the reaction temperatures of 40, 70, and 200 °C.
“…It should be noted that cold plasma recently has also been adopted to prepare supported metal catalysts combined with co‐precipitation and deposition‐precipitation methods in addition to impregnation method.…”
Section: Preparation Methods Of Supported Metal Catalystsmentioning
confidence: 99%
“…Moreover, superoxide can be easily formed during photocatalytic oxidation of CO evidenced by electron paramagnetic resonance (EPR) measurement. Zhang et al prepared Au/TiO 2 catalysts by AP plate‐to‐plate DBD oxygen cold plasma with a deposition‐precipitation process. The catalysts exhibited much higher CO oxidation activity than that prepared by conventional thermal calcination.…”
Section: Characteristics Of Supported Metal Catalysts Prepared By Ap mentioning
Supported metal catalysts are of great importance in energy and environmental applications. Atmospheric-pressure (AP) cold plasma, generally generated by dielectric barrier discharge and cold plasma jet, has been proved to be a fast, facile, and energy efficient method for fabricating supported metal catalysts. In this review, the recent progress, challenges, and perspectives of AP cold plasma for synthesizing supported metal catalysts are discussed. Focus is placed on recent work demonstrating the discharge types of AP cold plasma, and the characteristics of the synthesized supported metal catalysts. The reduction mechanism of AP cold plasma is also discussed in light of several possible mechanisms that have been proposed in previous work.
K E Y W O R D Satmospheric-pressure (AP) cold plasma, cold plasma jet, dielectric barrier discharge (DBD), hydrogen-containing species, supported metal catalysts Plasma Process Polym. 2018;15:e1700234.www.plasma-polymers.com
Renewable energy technology has been considered as a "MUST" option to lower the use of fossil fuels for industry and daily life. Designing critical and sophisticated materials is of great importance in order to realize high-performance energy technology. Typically, efficient synthesis and soft surface modification of nanomaterials are important for energy technology. Therefore, there are increasing demands on the rational design of efficient electrocatalysts or electrode materials, which are the key for scalable and practical electrochemical energy devices. Nevertheless, the development of versatile and cheap strategies is one of the main challenges to achieve the aforementioned goals. Accordingly, plasma technology has recently appeared as an extremely promising alternative for the synthesis and surface modification of nanomaterials for electrochemical devices. Here, the recent progress on the development of nonthermal plasma technology is highlighted for the synthesis and surface modification of advanced electrode materials for renewable energy technology including electrocatalysts for fuel cells, water splitting, metal-air batteries, and electrode materials for batteries and supercapacitors, etc.
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