Anchor Effect of Iron and Cobalt to Platinum on Carbon Substrates

Authors

Zidong Wei, Dept. of Chem., State Key Lab. for Phy. Chem. of the Solid Sur., Inst. of Phy. Chem., Xianem Univ. Xiamen 361005);

Corresponding Author

Zidong Wei

Abstract

The cathodic reduction of oxygen is studied on porous carbonbased electrodes carrying platinumiron and/or cobalt alloy catalysts. Electrodes using such electrocatalysts, particularly when used as cathodes in acidic electrolytes, remain stable for longer periods. The cathodic polarization of oxygen reduction on such electrodes is 20 mV to 40 mV lower than that on the conventional electrode on which only platinum alone is used as an electrocatalysts. An accelerated aging test (AAT) is used to evaluate the corrosion resistance and sintering resistance of each catalyst. The dissolution of the catalyst in the AAT filtrate is analysed and provides a measure of the corrosion resistance. The particle size of catalyst powders before and after AAT is determined and indicates the sintering resistance. Socalled “anchor effect” of iron and/or cobalt to platinum on carbon substrates are proposed to explain the enhanced effect of iron and cobalt in platinum alloy catalysts compared with catalysts that contain platinum alone.

DOI Link

https://doi.org/10.61558/2993-074X.1355

Publication Date

1998-02-28

Online Available Date

1998-02-28

Revised Date

1998-02-28

Received Date

1998-02-28

Recommended Citation

Zidong Wei. Anchor Effect of Iron and Cobalt to Platinum on Carbon Substrates[J]. Journal of Electrochemistry, 1998 , 4(1): 42-46.
DOI: 10.61558/2993-074X.1355
Available at: https://jelectrochem.xmu.edu.cn/journal/vol4/iss1/3

References

1LandsmanDA，LuczakFJ．Preciousmetal－chromiumaloycatalystforfuelcelelectrodes．USPatentNo．4316944，19822JalanVM．Noblemetal－vanadiumaloycatalystforfuelcels．USPatentNo．4202934，19803LuczakFJ，LandsmanDA．Ternaryfuel－celcatalystscontainingplatinum，cobaltandchromium．USPatentNo．4447506，19844RameshKV，ShklaAK．Carbon－basedelectrodescarryingplatinum－groupbimetalcatalystsforoxygenreductioninfuelcelswithacidicoralkalineelectrolytes．J．PowerSources，1987，19：2795StonehartP．Platinum－groupbimetalcatalystsforoxygenreduction．USPatentNo．4407986，19836Koji，H，TosihihisaK，AsahiK，KatsuhikoA．Highlyactivecatalystandhighlyactiveelectrodemadeofthiscatalyst．Eur．PatentNo．0292184，19887魏子栋，郭鹤桐，唐致远．Heattreatmentofcarbon－basedpowderscarryingplatinumaloycatalystsforoxygenreduction：influnceoncorrosionandparticlesize．J．PowerSources，1996，62（2）：628魏子栋，郭鹤桐，唐致远．氧在Pt－Fe－Co／C合金催化剂上的还原．催化学报，1995，16（2）：1419魏子栋，郭鹤桐，唐致远．Pretreatmentofacetylenceblack：influnceonitselectrochemicalbehaviour．J．PowerSources，1994，52：12310FeinsIR，DettlingJC，WanCZ．Phosphoric－acidfuel－celelectrode．Eur．PatentNo．097508，198411蔡树型，黄超．贵金属分析．北京：冶金工业出版社，198012JalanV，TaylorEJ．in：MclatypeJed．Proceedingofthesymposiumonthechemistryandphisicsofelectrocatalysis．Penington：ElectrochemicalSociety，1984：546