简介:NanocrystallineNi-Mo-Fealloydepositswereobtainedbyelectrodeposition.ThestructuresofthealloydepositswereanalyzedbyX-raydiffraction(XRD)andX-rayphotoelectronspectroscopy(XPS).TheXRDresultsofnanocrystallineNi-Mo-Fealloydepositshowthatmanydiffractionlinesdisappear,andthatthereisonlyonediffractionpeakat44.0°.TheXPSresultsofnanocrystallineNi-Mo-Fealloydepositsindicatethatthenickel,molybdenumandironofthedepositsexistinmetallicstate,andthatthebindingenergyofthealloyedelementsincreasestosomeextent.ThenanocrystallineNi-Mo-FealloydepositelectrodemayofferbetterelectrocatalyticactivitythanthepolycrystallinenickeleletrodeandthenanocrystallineNi-Moalloyelectrode.TheelectrochemicalimpedancespectrafromthenanocrystallineNi-Mo-Fealloyelectrodeindicatethathydrogenevolutionin30%(m/m)KOHatloweroverpotentialisinaccordancewiththeVolmer-Tafelmechanism,butwiththeVolmer-Heyrovskymechanismathigheroverpotential.
简介:Anewdinudeatingligandconsistingofatetraphanylporphyrinderivativecovalentlylinkedwithtris(2-benzimidazylmethyl)-amineanditshomodinudearCo-CoandheterodinnelearCo-Cucomplexesweresynthesizedandspectroscopicallycharacter-ized.Theheterobimetalliecobalt-coppercomplexbearingthreebenzimidazoleligandsforcopper,ascytochromecoxidaseac-tivesitemodel,wasappliedtothesurfaceofglassycarbonelec-trodetoshowelectrocatalytieactivityforO2reductioninaque-oussolutionatanaddityleveldosetophysiologicalpHvalue.Thekineticparametersofthiselectrocatalyticprocesswereob-tained.