Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이종목 | * |
dc.contributor.author | 이영미 | * |
dc.date.accessioned | 2019-01-24T16:30:14Z | - |
dc.date.available | 2019-01-24T16:30:14Z | - |
dc.date.issued | 2018 | * |
dc.identifier.issn | 1040-0397 | * |
dc.identifier.issn | 1521-4109 | * |
dc.identifier.other | OAK-24127 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/248256 | - |
dc.description.abstract | Highly dispersive Au nanoparticles on carbon black (Au NPs/CB) were synthesized in situ with co-present two different reducing agents of NaBH4 at various concentrations and citrate at a constant concentration of 3 mM. The average diameters of Au NPs on carbon support were in the range from 5.8 (+/- 2.4) to 2.0 (+/- 0.4) nm, with 50 particles quantified. Electrocatalytic activities of as-prepared Au NPs/CB were explored for oxygen reduction reaction (ORR) in basic solution with rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE) voltammetry. In results, the Au NPs/CB synthesized with 0.2 mM NaBH4 (2.0 nm of Au NPs diameter) represented the highest ORR catalytic activity with electron transfer number of 3.9 and mass activity of 0.25 mA cm(-2) mu g(-1)as well as a perfect resistance to methanol contamination. Especially, the half-wave potential of ORR curve which related to the kinetics of oxygen reduction was more positive compared with previously reported Au-based ORR catalysts. In addition, the Au NPs/CB prepared with 0.2 mM NaBH4 was also examined as a CO2 reduction catalyst in KHCO3 with KCl solution with scanning electrochemical microscopy (SECM). CO2 was reduced to CO selectively without hydrogen evolution at Au NPs/CB substrate electrode, which was directly monitored with an electrochemical CO microsensor as a tip electrode in SECM. In addition, we have identified the products of CO2 reduction through gas chromatography (GC)-mass spectrometry (MS), flame ionization detector (FID), and thermal conductivity detector (TCD). | * |
dc.language | English | * |
dc.publisher | WILEY-V C H VERLAG GMBH | * |
dc.subject | oxygen reduction reaction | * |
dc.subject | carbon dioxide reduction | * |
dc.subject | scanning electrochemical microscopy | * |
dc.subject | Au-based catalyst | * |
dc.title | Highly Dispersive Gold Nanoparticles on Carbon Black for Oxygen and Carbon Dioxide Reduction | * |
dc.type | Article | * |
dc.relation.issue | 12 | * |
dc.relation.volume | 30 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 2861 | * |
dc.relation.lastpage | 2868 | * |
dc.relation.journaltitle | ELECTROANALYSIS | * |
dc.identifier.doi | 10.1002/elan.201800555 | * |
dc.identifier.wosid | WOS:000453612300005 | * |
dc.author.google | Kim, Yeomin | * |
dc.author.google | Jo, Ara | * |
dc.author.google | Ha, Yejin | * |
dc.author.google | Lee, Yongjin | * |
dc.author.google | Lee, Dongil | * |
dc.author.google | Lee, Youngmi | * |
dc.author.google | Lee, Chongmok | * |
dc.contributor.scopusid | 이종목(55812178500) | * |
dc.contributor.scopusid | 이영미(35237907700) | * |
dc.date.modifydate | 20240422130854 | * |