Jung, Hyun Young Kim, Do Hyung Chun, Hyun Kyung Kim, Sang Hoon Lim, Chae Sun Byun, Ji Young Jung, Yung Joon 2024-01-20T16:02:12Z 2024-01-20T16:02:12Z 2021-09-05 2011-11 1614-6832 https://pubs.kist.re.kr/handle/201004/129825 Porous metals attract significant interest for use in diverse electrochemical catalytic applications. However the fabrication of scalable and controlled porous metal structures on the nanoscale, particularly with highly catalytic pure Pt, still remains a significant challenge. We demonstrate highly engineered nanoporous Pt thin films by the dealloying of a Pt-Si binary alloy system with a predetermined alloy composition. Controlled pore dimensions and nanostructures are obtained by tailoring the Pt-Si alloy composition followed by selective Si etching. As a result, isotropic open nanopores are formed in continuous Pt ligaments and the porosity becomes larger on increasing the Si/Pt atomic ratio, which leads to the formation of a higher surface area and active catalytic sites. The formed nanoporous Pt film shows a 32-times-higher catalytic activity than Pt/C catalysts, with a high current density and low charge-transfer resistance during methanol electro-oxidation. The results reported here open up possibilities to develop high-performance and reliable catalytic electrodes in energy and environmental applications. English WILEY-V C H VERLAG GMBH METHANOL ELECTROOXIDATION PTRU/C CATALYSTS PT-RU MECHANISM DECOMPOSITION SURFACTANT OXIDATION NETWORKS Towards Engineering Nanoporous Platinum Thin Films for Highly Efficient Catalytic Applications Article 10.1002/aenm.201100402 1 ADVANCED ENERGY MATERIALS, v.1, no.6, pp.1126 - 1132 ADVANCED ENERGY MATERIALS 1 6 1126 1132 scie scopus 000297056500025 2-s2.0-84863644135 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article METHANOL ELECTROOXIDATION PTRU/C CATALYSTS PT-RU MECHANISM DECOMPOSITION SURFACTANT OXIDATION NETWORKS binary alloys catalysis dealloying electro-oxidation nanoporous platinum