DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Han, Sang Woo | - |
dc.contributor.advisor | 한상우 | - |
dc.contributor.author | Song, Minjin | - |
dc.date.accessioned | 2021-05-12T19:31:23Z | - |
dc.date.available | 2021-05-12T19:31:23Z | - |
dc.date.issued | 2018 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=879467&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/283714 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 화학과, 2018.8,[iv, 38 p. :] | - |
dc.description.abstract | Development of a catalyst for formic acid decomposition into hydrogen and carbon oxide has been highlighted due to the potentiality of formic acid as a prospective hydrogen source. A highly active and selective catalyst is readily synthesized in aqueous solution via one pot synthesis of PdAg alloy octahedral nanocrystals (ONCs) followed by epitaxial deposition of Pd. The composition and thickness of the obtained PdAg@Pd core-shell ONCs can be controlled with slight modifications during synthesis, cutting across catalytic activity. The optimized structural conditions (Pd to Ag ratio of 3.5:1, Pd shell with 1.1 atomic layers) provide lowered activation energy and exceedingly high activity under ambient condition, represented by turnover frequency of $12260 h^{-1}$ (at $30^circ C$) and $21500 h^{-1}$ (at $50^ circ C$) as well as high selectivity. The remarkable catalytic activity comes from the combination of the electronic promotion of Ag on Pd and the lattice strain arising from the difference in lattice parameters between PdAg and Pd. Thus, our design paves a synthetic route to develop a nanocatalyst with efficient hydrogen storage in formic acid and enhanced performance of proton exchange membrane fuel cell. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | formic acid decomposition▼acore-shell nanoparticles▼aligand effect▼astrain effect | - |
dc.subject | 포름산 분해▼a코어-쉘 나노입자▼a리간드 효과▼a변형 효과 | - |
dc.title | Octahedral PdAg@Pd core-shell nanocrystals with ultrathin Pd shells as highly efficient catalysts for formic acid dehydrogenation | - |
dc.title.alternative | 초박형 Pd 쉘을 갖는 팔면체 PdAg@Pd 코어-쉘 나노결정의 효율적인 포름산 탈수소화반응 촉매로서의 활용 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :화학과, | - |
dc.contributor.alternativeauthor | 송민진 | - |
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