PdAg Nanoparticles within Core-Shell Structured Zeolitic Imidazolate Framework as a Dual Catalyst for Formic Acid-based Hydrogen Storage/Production

Meicheng Wen; Kohsuke Mori; Yuya Futamura; Yasutaka Kuwahara; Miriam Navlani-García; Taicheng An; Hiromi Yamashita

doi:10.1038/s41598-019-52133-5

PdAg Nanoparticles within Core-Shell Structured Zeolitic Imidazolate Framework as a Dual Catalyst for Formic Acid-based Hydrogen Storage/Production

Sci Rep. 2019 Oct 30;9(1):15675. doi: 10.1038/s41598-019-52133-5.

Authors

Meicheng Wen^{1

2}, Kohsuke Mori^{3

4

5}, Yuya Futamura¹, Yasutaka Kuwahara^{1

6}, Miriam Navlani-García¹, Taicheng An², Hiromi Yamashita^{7

8}

Affiliations

¹ Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.
² Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering Institute of Environmental Health and Pollution control, Guangdong University of Technology, Guangdong, 51006, China.
³ Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan. mori@mat.eng.osaka-u.ac.jp.
⁴ JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan. mori@mat.eng.osaka-u.ac.jp.
⁵ Elements Strategy Initiative for Catalysts Batteries (ESICB), Kyoto University, Katsura, Kyoto, 615-8520, Japan. mori@mat.eng.osaka-u.ac.jp.
⁶ Elements Strategy Initiative for Catalysts Batteries (ESICB), Kyoto University, Katsura, Kyoto, 615-8520, Japan.
⁷ Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan. yamashita@mat.eng.osaka-u.ac.jp.
⁸ Elements Strategy Initiative for Catalysts Batteries (ESICB), Kyoto University, Katsura, Kyoto, 615-8520, Japan. yamashita@mat.eng.osaka-u.ac.jp.

Abstract

Formic acid (FA; HCOOH) is one of the most promising candidates for the storage of hydrogen (H₂). Herein, we report a H₂ storage/production system based on the hydrogenation of CO₂ and dehydrogenation of FA, using a nanostructured heterogeneous catalyst. Pd₁Ag₂ nanoparticles with an average size of 2.8 nm were encapsulated within a zeolitic imidazolate framework (ZIF-8) having a core-shell structure (ZIF-8@Pd₁Ag₂@ZIF-8). This composite displayed high activity and stability during both the hydrogenation of CO₂ to produce FA and the dehydrogenation of FA into H₂ and CO₂. This improved performance is attributed to the use of ultrafine Pd₁Ag₂ nanoparticles as well as the spatial regulation of the nanoparticles within the reaction field. This study suggests a new strategy for controlling the spatial distribution of metal nanoparticles within MOFs so as to fine-tune the catalytic activity and selectivity of ZIF-8@metal nanoparticles@ZIF-8 catalysts.

Abstract

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