单分散纳米Pd的简易加热合成及对甲醛的电催化氧化
|
摘要
以PdCl2为金属前驱体,在水-乙醇混合体系内,添加微量的CTAB,简易加热合成单分散纳米Pd粒子,用XRD和TEM等技术进行了表征,考察了PdCl2/CTAB组成对纳米粒子形貌和尺寸的影响,通过循环伏安法对纳米Pd粒子修饰玻碳电极对甲醛的电催化活性进行了研究。结果表明,通过改变PdCl2/CTAB组成可以调控纳米Pd粒子的粒径和形貌;当PdCl2与CTAB的物质的量之比为1∶21、于(70±1)℃反应3h时,得到呈单分散性的多边形纳米钯粒子,粒径为(8±1)nm,它对甲醛有较高的电催化活性。
Monodispersed nano-Pd particles were prepared via a simple heating method in palladium(Ⅱ)chloride H2O/EtOH(5/1,V/V)solution with hexadecyl trimethyl ammonium bromide(CTAB)added.The samples were characterized by XRD and TEM.The effects of the composition of PdCl2and CTAB on the growth morphology and size of Pd nanoparticles were investigated.The electrocatalytic properties of the nanoPd modified glassy carbon(Pd/GC)electrode for formaldehyde oxidation were also measured by cyclic voltammetry.The results indicate that a promising possibility of a size and morphology of the nano-Pd particles are controlled by adjusting the composition of PdCl2and CTAB.The polygonal nano-Pd particles with a distributed size of(8±1)nm can be obtained when the molar ratio of PdCl2∶CTAB is 1∶21and the reaction time is 3hat(70±1)℃.These Pd nanoparticles show the excellent electrocatalytic activity for the oxidation of formaldehyde.
Monodispersed nano-Pd particles were prepared via a simple heating method in palladium(Ⅱ)chloride H2O/EtOH(5/1,V/V)solution with hexadecyl trimethyl ammonium bromide(CTAB)added.The samples were characterized by XRD and TEM.The effects of the composition of PdCl2and CTAB on the growth morphology and size of Pd nanoparticles were investigated.The electrocatalytic properties of the nanoPd modified glassy carbon(Pd/GC)electrode for formaldehyde oxidation were also measured by cyclic voltammetry.The results indicate that a promising possibility of a size and morphology of the nano-Pd particles are controlled by adjusting the composition of PdCl2and CTAB.The polygonal nano-Pd particles with a distributed size of(8±1)nm can be obtained when the molar ratio of PdCl2∶CTAB is 1∶21and the reaction time is 3hat(70±1)℃.These Pd nanoparticles show the excellent electrocatalytic activity for the oxidation of formaldehyde.
引文
[1]Gao GY,Guo DJ,Li HL.Electrocatalytic Oxidation of Formaldehyde on Palladium Nanoparticles Supported on MultiWalled Carbon Nanotubes[J].J Power Sources,2006,162(2):1094~1098.
[2]Wang Z,Zhu ZZ,Li HL.Eectrocatalytic Oxidation of Formaldehyde on Platinum Well-Dispersed into Single-Wall Carbon Nanotube/Polyaniline Composite Film[J].Applied Surface Science,2007,253(22):8811~8817.
[3]Santos MC,Bulhoes LO.Electrogravimetric inverstigation of formaldehyde oxidation at Pt electrodes in acidic media[J].Electrochim Acta,2004,49:1893~1901.
[4]Zhang JT,Huang MH,Ma HY,et al.High catalytic activity of nanostructured Pd thin films electrochemically deposited on polycrystalline Pt and Au substrates towards electro-oxidation of methanol[J].Electrochemistry Communications.2007,9(6):1298~1304.
[5]Yang Y,Buchwald SL.Ligand-controlled palladium-catalyzed regiodivergent suzuki-miyaura cross-coupling of allylboronates and aryl halides[J].J.Am.Chem.Soc.,2013,135:10642~10645.
[6]Zhou PP,Wang HH,Yang JZ,et al.Bacteria cellulose nanofibers supported palladium(0)nanocomposite and its catalysis evaluation in Heck reaction[J].Ind.Eng.Chem.Res.,2012,51:5743~5748.
[7]Saha D,Sen R,Maity T,et al.Anchoring of palladium onto surface of porous metal-organic framework through postsynthesis modification and studies on Suzuki and Stille coupling reactions under heterogeneous condition[J].Langmuir,2013,29(9):3140~3151.
[8]Huang YJ,Liao JH,Liu CP,et al.The size controlled synthes is of Pd/Ccatalysts by different solvents for formic acid electrooxidation[J].Nanotechnology,2009,20:105604~105609.
[9]吴嵩,刘宾虹,杨俊强,刘芙.Pd/MWCNT的合成及其对甲酸电化学氧化的催化性能[J].材料科学与工程学报,2010,2:189~193.
[10]Ho PF,Chi KM.Size-controlled synthesis of Pd nanoparticles from pdiketonato complexes of palladium[J].Nanotechnology,2004,15(8):1059~1064.
[11]Li Y,Boone E,El-Sayed MA.Size effects of PVP-Pd nanoparticles on the catalytic Suzuki reactions in aqueous solution[J].Langmuir,2002,18(12):4921~4925.
[12]张莉,王聪,袁建,陈仁喜.水浴法制备钯纳米颗粒及其修饰电极的电催化性能[J].稀有金属材料与工程,2013,42(9):1936~1940.
[13]Tong X,Zhao Y,Huang T,et al.Controlled synthesis of pompon-like self-assemblies of Pd nanoparticles under microwave irradiation[J].Appl.Surf.Sci.,2009,255(23):9468~9468.
[14]Kim S,Park J,Jang Y,et al.Synthesis of monodisperse palladium nanoparticles[J].NaNo.Lett.,2003,3:1289~1291.
[15]Zhao N,Qi LM.Low-temperature synthesis of star-shaped PbS nanocrystals in aqueous solutions of mixed cationic/anionic surfactants[J].Adv Mater,2006,18:359~362.
[16]Peng X.Green Chemical Approaches Toward High-Quality Semiconductor Nanocrystals[J].Chem Eur J,2002,8:335~339.
[2]Wang Z,Zhu ZZ,Li HL.Eectrocatalytic Oxidation of Formaldehyde on Platinum Well-Dispersed into Single-Wall Carbon Nanotube/Polyaniline Composite Film[J].Applied Surface Science,2007,253(22):8811~8817.
[3]Santos MC,Bulhoes LO.Electrogravimetric inverstigation of formaldehyde oxidation at Pt electrodes in acidic media[J].Electrochim Acta,2004,49:1893~1901.
[4]Zhang JT,Huang MH,Ma HY,et al.High catalytic activity of nanostructured Pd thin films electrochemically deposited on polycrystalline Pt and Au substrates towards electro-oxidation of methanol[J].Electrochemistry Communications.2007,9(6):1298~1304.
[5]Yang Y,Buchwald SL.Ligand-controlled palladium-catalyzed regiodivergent suzuki-miyaura cross-coupling of allylboronates and aryl halides[J].J.Am.Chem.Soc.,2013,135:10642~10645.
[6]Zhou PP,Wang HH,Yang JZ,et al.Bacteria cellulose nanofibers supported palladium(0)nanocomposite and its catalysis evaluation in Heck reaction[J].Ind.Eng.Chem.Res.,2012,51:5743~5748.
[7]Saha D,Sen R,Maity T,et al.Anchoring of palladium onto surface of porous metal-organic framework through postsynthesis modification and studies on Suzuki and Stille coupling reactions under heterogeneous condition[J].Langmuir,2013,29(9):3140~3151.
[8]Huang YJ,Liao JH,Liu CP,et al.The size controlled synthes is of Pd/Ccatalysts by different solvents for formic acid electrooxidation[J].Nanotechnology,2009,20:105604~105609.
[9]吴嵩,刘宾虹,杨俊强,刘芙.Pd/MWCNT的合成及其对甲酸电化学氧化的催化性能[J].材料科学与工程学报,2010,2:189~193.
[10]Ho PF,Chi KM.Size-controlled synthesis of Pd nanoparticles from pdiketonato complexes of palladium[J].Nanotechnology,2004,15(8):1059~1064.
[11]Li Y,Boone E,El-Sayed MA.Size effects of PVP-Pd nanoparticles on the catalytic Suzuki reactions in aqueous solution[J].Langmuir,2002,18(12):4921~4925.
[12]张莉,王聪,袁建,陈仁喜.水浴法制备钯纳米颗粒及其修饰电极的电催化性能[J].稀有金属材料与工程,2013,42(9):1936~1940.
[13]Tong X,Zhao Y,Huang T,et al.Controlled synthesis of pompon-like self-assemblies of Pd nanoparticles under microwave irradiation[J].Appl.Surf.Sci.,2009,255(23):9468~9468.
[14]Kim S,Park J,Jang Y,et al.Synthesis of monodisperse palladium nanoparticles[J].NaNo.Lett.,2003,3:1289~1291.
[15]Zhao N,Qi LM.Low-temperature synthesis of star-shaped PbS nanocrystals in aqueous solutions of mixed cationic/anionic surfactants[J].Adv Mater,2006,18:359~362.
[16]Peng X.Green Chemical Approaches Toward High-Quality Semiconductor Nanocrystals[J].Chem Eur J,2002,8:335~339.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |