于阳离子隔膜的电解槽中,以MnO2/Mn2+电对作催化氧化的媒介,在超声波高频振荡下,电生成的MnO2颗粒以几十nm至几μm尺寸分散在溶液中.随后将甘油电化学氧化为甘油醛,该MnO2/Mn2+电对催化活性的选择性高,电流效率可达97.4%.
蔡燕红
,
陈力勤
,
陈日耀
,
郑曦
,
陈晓
,
陈震
. 超声波电氧化合成纳米MnO_2及其在制备甘油醛中的应用[J]. 电化学, 2007
, 13(3)
: 325
-328
.
DOI: 10.61558/2993-074X.1831
Glyceraldehyde is prepared by using MnO2/ Mn2+as the media in a cationic membrane electrolytic cell.Under ultrasonic high-frequency oscillation,the electro-generated nanometer MnO2 dispersed in the solution with several tens nm till several micron.Then the MnO2 is used for selective oxidation of glycerine to glyceraldehydes.The catalyzing selectivity of MnO2/ Mn2+is high and the current efficiency may account to 97.4 %.
[1]Shen P W(申泮文),Wang J T(王积涛).Compoundglossary[M].Shanghai:Shanghai Dictionary Press,2002.308.
[2]Wang X J(万新军),Song M Y(宋明友),Wu R(吴蓉),et al.Synthesis of glyceraldehydes by indirect e-lectro-oxidation[J].Chinesejournal of Applied Chemis-try,2003,20(6):578-581.
[3]Wang F W(王凤武),Wei Y J(魏亦军),Chu D B(褚道葆).Preparation and properties of TiO2/nano-Pt mod-ified electrode and its application[J].Chemical Indus-try and Engineering,2004,55(5):757-763.
[4]Fujishima S(藤岛昭),Chen Z(陈震),Yao J N(姚建年).Electrochemistry method[M].Beijing:BeijingPublishing House Press,1995.356.
[5]Spadaro J T,Isabelle L,Ranganathan V.Hydroxylradi-cal mediated degradation of azo dyes:evidence for ben-zene generation[J].Environ Sci Technol,1994,28:1389-1393.
[6]Faust B C,Hoffmann R H,Bahnemann D W.Kineticsand meclanism of the photoassisted oxidation of sulfurdioxide on hematite[J].Phys Chem,1989,93(17):6371-6381.
[7]Chen Z,Okumi Z,Takehara Z I.Application of the SPEmethod to organic electrochemistry XⅡ-lead dioxide asa mediator for electro-oxidation of cinnamyl alcohol onPt-nafion[J].Bull Chem Soc Jpn,1991,64:1261.