全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
电化学  2009 

钯镍合金薄膜电极上甲酸电氧化-去合金化效应

, PP. 377-381

Keywords: 钯镍合金,去合金化,甲酸,电催化

Full-Text   Cite this paper   Add to My Lib

Abstract:

在含PdCl2、NiSO4和乙二胺的弱碱性镀液中,于Au电极上用恒电位电沉积Pd-Ni合金薄膜,后经酸性溶液中循环伏安法处理,得到去合金化的Pd-Ni电极.扫描电镜以及电化学测试表明,去合金化处理使Pd-Ni镀膜表面微观粗糙度增加,比表面积增大;ICP-AES和XPS分析证实合金表层Ni的优先溶出造成Pd的富集.去合金化处理的Pd-Ni电极电催化氧化甲酸的活性明显优于未处理的Pd-Ni电极和多晶Pd电极.

References

[1]  Wang J Y,Kang Y Y,Cai W B,et al.Boron-dopedpalladium nanoparticles on carbon black as a superiorcatalyst for formic acid electro-oxidation[J].J PhysChem C,2009,113(19):8366-8372.
[2]  Zhang L L,Tang Y W,Lu T H,et al.A carbon-sup-ported Pd-P catalyst as the anodic catalyst in a directformic acid fuel cell[J].J Power Source,2006,162(1):177-179.
[3]  Wang X M,Xiao YY,et al.Electrocatalytic perform-ance of Pd Co-C catalyst for formic acid oxidation[J].Electrochem Commun,2008,10(10):1644-1646.
[4]  Shirlaine K,Peter S.Electrocatalysis on bimetallic sur-faces:modifying catalytic reactivity for oxygen reductionby voltammetric surface dealloying[J].J Am ChemSoc,2007,129(42):12624-12625.
[5]  Jiang M,Lin X Q,Zhang Z X.Fabrication of sponge-like nanoporous platinum electrocatalysts for oxygen re-duction through alloying and dealloying processes[J].J China Univ Sci Tech,2008,38(6):614-622.
[6]  Wang K W,Chuang S R,Liu C W.Surface segregationof PdxNi100-xalloy nanoparticles[J].J Phys Chem C,2008,112(27):10242-10246.
[7]  Rousset J L,Bertolini J C,Miegge P.Theory of segre-gation using the equivalent-medium approximation andbond-strength modifications at surfaces:application tofcc Pd-X alloys[J].Phys Rev B,1996,53(8):4947-4957.
[8]  Pourovskii L V,Ruban A V,Abrikosov I A,et al.Bulk ordering and surface segregation in Ni50Pt50[J].Phys Rev B,2001,64(3):035421.
[9]  Pavese A,Solis V.Comparative investigation of formicacid and formaldehyde oxidation on palladium by a rota-ting ring-disc electrode and on-line mass spectroscopy inacidic solutions[J].J Electroanal Chem,1991,301(1/2):117-127.
[10]  ZHOU Quan(周全),ZHANG Cun-zhong(张存中),LU Xiao-lin(陆晓林),et al.The electro-catalytic oxi-dation of HCOOH on electrodeposited Pd electrode[J].Electrochemistry,2000,6(3):329-334.
[11]  Demirci U B.Theoretical means for searching bimetal-lic alloys as anode electrocatalysts for direct liquid-feedfuel cells[J].J Power Source,2007,173(1):11-18.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133