Observation of Single Pt Nanoparticle Collisions: Enhanced Electrocatalytic Activity on a Pd Ultramicroelectrode |
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| Authors: | Changki Park Prof. Seong Jung Kwon |
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| Affiliation: | Department of Chemistry, University of Konkuk, Seoul, Korea |
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| Abstract: | Single Pt nanoparticle (NP) collisions on an electrode surface were detected by using an electrocatalytic amplification method with a Pd ultramicroelectrode (UME). Pd is not a preferred material for UMEs for the detection of single Pt NP collisions, because Pd shows similar electrocatalytic activity compared with Pt for hydrazine oxidation, thus resulting in a high background current level. However, a Pt NP colliding on the Pd UME shows greatly enhanced activity compared with a Pt NP on an inert UME, such as a Au UME, which is usually used for the detection of single Pt NP collisions. The use of an electroactive UME material instead of an inert one facilitated the study of single‐NP activity on the various solid supports, which is important in many NP applications. |
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| Keywords: | electrochemical amplification electrochemistry hydrazine oxidation nanoparticles Pd ultramicroelectrodes |
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