The study about the strong metal-support interaction (SMSI) effect has been reported actively. Here, we reveal the SMSI effect between Au nanoparticles and the mesoporous oxides under methanol oxidation. Au nanoparticle were used as a metal due to their nontoxicity and weak adsorption property, which lead to the green chemical reaction and selective reaction. Also the mesoporous structure was used as the support oxides because its extensive surface area and high crystallinity enhances the catalytic activity and inhibits an aggregation of deposited metal. Here, we synthesized a mesoporous oxide, including $Co_3O_4, NiO, Fe_2O_3$, via a nanocasting method using KIT-6 as hard template. Then, we deposited Au nanoparticles on them. Depending on the support oxide type, the different catalytic activity and selectivity was obtained. When pure mesoporous oxides were used as a catalyst in the methanol oxidation, the catalytic activity showed the trend of $Co_3O_4 > NiO > Fe_2O_3$. It is due to their redox capability of reducible oxides. However, when gold nanoparticles were deposited on, the catalytic activity exhibits the order of $Au/Fe_2O_3$ > Au/Co_3O_4 > Au/NiO$. It is result of the SMSI effect between the Au nanoparticle and the mesoporous oxides. These result can be applicable in tuning the catalytic activity by controlling the interface effect between the metal and oxide.
본 연구에서는 금-다공성 산화물 지지체 계면에서 일어나는 메탄올 산화반응에 대하여 연구하였다.
금은 무독성이며 낮은 화학흡착도를 가져서 친환경 화학반응과 선택적 반응에 우수성을 보인다.
또한 다공성 지지체는 넓은 표면적과 결정성으로 촉매 활성도를 높이며 열적 안정성을 갖게 한다.
다공성 산화물은 나노케스팅 방법으로 합성되었으며 금은 Urea 환원 방법에 의하여 담지되었다.
지지체의 종류에 따라 촉매 활성도와 선택성이 달라진다. 금이 담지되지 않은 순수한 다공성
산화물을 촉매로 사용하였을 때, $Co_3O_4 > NiO > Fe_2O_3$ 의 순으로 촉매 활성도를 보이며, 이것은
redox capability에 기인한다. 하지만 금이 담지 되었을 때는 금-산화물 계면에서의 상호작용으로
인하여 $Au/Fe_2O_3 > Au/Co_3O_4 > Au/NiO$ 순으로 촉매 활성도를 보인다.
