journal article·2021-10-08

Layer Orientation-Engineered Two-Dimensional Platinum Ditelluride for High-Performance Direct Alcohol Fuel Cells

Jinfa Chang, Tae-Jun Ko, Minyeong Je, Hee-Suk Chung, Sang Sub Han, Mashiyat Sumaiya Shawkat, Mengjing Wang, Sang Jin Park, Seung Min Yu, Tae-Sung Bae, Myoung-Woon Moon, Kyu Hwan Oh, Heechae Choi, Yang Yang, Yeonwoong Jung

ACS Energy Letters· Volume 6· Issue 10
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Abstract

Platinum (Pt) has been considered the best catalyst for oxygen reduction reaction (ORR) based-direct liquid fuel cells (DLFCs). However, its high cost and the mixed potential issue have been obstacles for commercialization. Herein, we report a new Pt-based catalyst of two-dimensionally layered platinum ditelluride (2D PtTe2) with mixed layer orientation, termed M-PtTe2. This material constitutes vertically- and horizontally aligned 2D PtTe2 layers, which synergistically boost the ORR reaction; the former promotes O-2 adsorption and electron transfer, while the latter boosts O-O bond breaking and O-H bond coupling. The M-PtTe2 synthesized on nanostructured carbon papers significantly surpasses the ORR performances of commercial Pt/C, yielding 2.4-times higher mass activity in half-cell and 2-times higher maximum power density in actual devices. Furthermore, it exhibits extremely low alcohol adsorption energies, unveiling unprecedented suitability for alcohol tolerant DLFCs. This new understanding of the role of the 2D layer orientation in ORR kinetics and thermodynamics suggests useful catalyst design principles.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced Photocatalysis Techniques

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

Affiliations

NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States

Theoretical Materials and Chemistry Group, Institute of Inorganic Chemistry, University of Cologne, Cologne 50939, Germany

Analytical Research Division, Korea Basic Science Institute, Jeonju 54907, Republic of Korea

Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea

Department of Electrical and Computer Engineering, University of Central Florida, Orlando, Florida 32816, United States

Materials and Life Science Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea

Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida 32816, United States

Renewable Energy and Chemical Transformation Cluster, University of Central Florida, Orlando, Florida 32816, United States

Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States

Funding

Bundesministerium f??r Bildung und Forschung · National Research Foundation of Korea · National Science Foundation

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