| 학회 | 한국재료학회 |
| 학술대회 | 2018년 가을 (11/07 ~ 11/09, 여수 디오션리조트) |
| 권호 | 24권 2호 |
| 발표분야 | 9. 한-일 재료공학 심포지엄(KMST 2018)-오거나이저: 권도균 교수(한국항공대) |
| 제목 | Immiscible bimetallic catalysts for direct H2O2 synthesis |
| 초록 | Today, hydrogen peroxide (H2O2), an important commodity chemical, is commercially produced by an indirect process called by anthraquinone process. The direct synthesis of H2O2 from molecular H2 and O2 is gathering many researchers’ attention because the anthraquinone process produces concentrated H2O2, resulting in the associated storage and transport hazards. Moreover many applications require only dilute aqueous solutions on a small scale. Palladium (Pd) is well known as a hydrogen-storage metal and there have been many researches on catalysts for direct H2O2 synthesis. Not a few attempts to improving catalytic activities by alloying Pd with other elements have been reported so far. We present that bimetallic materials which do not form alloy phase between two elements can provide better H2O2-producing performances or achieve better cost-efficiency than Pd materials. In our results, bimetallic catalysts have two domains in one nanoparticle, which carry out two different functions with synergy. One domain participates in dissociation of H2 and supply of hydrogen atoms, while the other domain takes part in supply of O2 suppressing O2 dissociation. In this way, new bimetallic catalysts are realized showing comparable catalytic activities with palladium. We synthesize bimetallic catalysts by the polyol reduction method. XRD and STEM-EDX prove that there are not alloys but two domains in one nanoparticle. |
| 저자 | Hyobin Nam1, Donghun Kim1, Young-Hoon Kim2, Jae-Pyung Ahn1, Kwan-Young Lee2, Sang Soo Han1, Seung Yong Lee1 |
| 소속 | 1Korea Institute of Science and Technology, 2Korea Univ. |
| 키워드 | hydrogen peroxide; direct synthesis; immiscible composites; catalysts |
