DataVXAdvanced MaterialsPaper
journal article·2023-01Open access

Heteroepitaxial Growth of B5‐Site‐Rich Ru Nanoparticles Guided by Hexagonal Boron Nitride for Low‐Temperature Ammonia Dehydrogenation

Sungsu Kang, Junyoung Cha, Young Suk Jo, Yu‐Jin Lee, Hyuntae Sohn, Younhwa Kim, Chyan Kyung Song, Yongmin Kim, Dong‐Hee Lim, Jungwon Park, Chang Won Yoon

Advanced Materials· Volume 35· Issue 4
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Abstract

Abstract Ruthenium is one of the most active catalysts for ammonia dehydrogenation and is essential for the use of ammonia as a hydrogen storage material. The B5‐type site on the surface of ruthenium is expected to exhibit the highest catalytic activity for ammonia dehydrogenation, but the number of these sites is typically low. Here, a B5‐site‐rich ruthenium catalyst is synthesized by exploiting the crystal symmetry of a hexagonal boron nitride support. In the prepared ruthenium catalyst, ruthenium nanoparticles are formed epitaxially on hexagonal boron nitride sheets with hexagonal planar morphologies, in which the B5 sites predominate along the nanoparticle edges. By activating the catalyst under the reaction condition, the population of B5 sites further increases as the facets of the ruthenium nanoparticles develop. The electron density of the Ru nanoparticles also increases during catalyst activation. The synthesized catalyst shows superior catalytic activity for ammonia dehydrogenation compared to previously reported catalysts. This work demonstrates that morphology control of a catalyst via support‐driven heteroepitaxy can be exploited for synthesizing highly active heterogeneous catalysts with tailored atomic structures.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · Hydrogen Storage and Materials · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemical and Biological Engineering Institute of Chemical Processes Seoul National University Seoul 08826 Republic of Korea

Center for Nanoparticle Research Institute for Basic Science (IBS) Seoul 08826 Republic of Korea

Center for Hydrogen and Fuel Cell Research Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea

Department of Environmental Engineering Chungbuk National University Chungbuk 28644 Republic of Korea

Institute of Engineering Research College of Engineering Seoul National University Seoul 08826 Republic of Korea

Advanced Institute of Convergence Technology Seoul National University Suwon 16229 Republic of Korea

Hydrogen and Low Carbon Research Laboratories Research Institute of Industrial Science and Technology (RIST) Pohang 37673 Republic of Korea

Hydrogen and Low Carbon Energy R&D Laboratories POSCO N.EX.T Hub Seoul 06194 Republic of Korea

Department of Chemical Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

Funding

Institute for Basic Science · Pohang University of Science and Technology

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