BROWSE

Related Researcher

Author's Photo

Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

ITEM VIEW & DOWNLOAD

A General Strategy to Atomically Dispersed Precious Metal Catalysts for Unravelling Their Catalytic Trends for Oxygen Reduction Reaction

DC Field Value Language
dc.contributor.author Kim, Jae Hyung ko
dc.contributor.author Shin, Dongyup ko
dc.contributor.author Lee, Jaekyoung ko
dc.contributor.author Baek, Du San ko
dc.contributor.author Shin, Tae Joo ko
dc.contributor.author Kim, Yong -Tae ko
dc.contributor.author Jeong, Hu Young ko
dc.contributor.author Kwak, Ja Hun ko
dc.contributor.author Kim, Hyungjun ko
dc.contributor.author Joo, Sang Hoon ko
dc.date.available 2020-05-15T09:39:46Z -
dc.date.created 2020-05-11 ko
dc.date.issued 2020-02 ko
dc.identifier.citation ACS NANO, v.14, no.2, pp.1990 - 2001 ko
dc.identifier.issn 1936-0851 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/32085 -
dc.description.abstract Atomically dispersed precious metal catalysts have emerged as a frontier in catalysis. However, a robust, generic synthetic strategy toward atomically dispersed catalysts is still lacking, which has limited systematic studies revealing their general catalytic trends distinct from those of conventional nanoparticle (NP)-based catalysts. Herein, we report a general synthetic strategy toward atomically dispersed precious metal catalysts, which consists of "trapping" precious metal precursors on a heteroatom-doped carbonaceous layer coated on a carbon support and "immobilizing" them with a SiO2 layer during thermal activation. Through the "trapping-and-immobilizing" method, five atomically dispersed precious metal catalysts (Os, Ru, Rh, Ir, and Pt) could be obtained and served as model catalysts for unravelling catalytic trends for the oxygen reduction reaction (ORR). Owing to their isolated geometry, the atomically dispersed precious metal catalysts generally showed higher selectivity for H2O2 production than their NP counterparts for the ORR. Among the atomically dispersed catalysts, the H2O2 selectivity was changed by the types of metals, with atomically dispersed Pt catalyst showing the highest selectivity. A combination of experimental results and density functional theory calculations revealed that the selectivity trend of atomically dispersed catalysts could be correlated to the binding energy difference between *OOH and *O species. In terms of 2 e(-) ORR activity, the atomically dispersed Rh catalyst showed the best activity. Our general approach to atomically dispersed precious metal catalysts may help in understanding their unique catalytic behaviors for the ORR. ko
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title A General Strategy to Atomically Dispersed Precious Metal Catalysts for Unravelling Their Catalytic Trends for Oxygen Reduction Reaction ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85082767241 ko
dc.identifier.wosid 000518024700067 ko
dc.type.rims ART ko
dc.identifier.doi 10.1021/acsnano.9b08494 ko
dc.identifier.url https://pubs.acs.org/doi/abs/10.1021/acsnano.9b08494 ko
Appears in Collections:
PHY_Journal Papers
UCRF_Journal Papers
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show simple item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU