DataVXACS Applied Materials & InterfacesPaper
journal article·2021-05-26Open access

Mechanism of Hydrogen Storage and Structural Transformation in Bimetallic Pd–Pt Nanoparticles

Akhil Tayal, Okkyun Seo, Jaemyung Kim, Hirokazu Kobayashi, Tomokazu Yamamoto, Syo Matsumura, Hiroshi Kitagawa, Osami Sakata

ACS Applied Materials & Interfaces· Volume 13· Issue 20
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Source abstract

Abstract

The hydrogen storage capacity of Pd nanoparticles (NPs) decreases as the particles become smaller; however, this reduced capacity is ameliorated by addition of Pt. In the present work, the hydrogen storage mechanism and structural transformations of core (Pd)-shell (Pt) (CS) and solid-solution (SS) NPs during hydrogen absorption and desorption (PHAD) processes are investigated. In situ X-ray absorption spectroscopy measurements were performed to study the evolution of electronic and local structures around Pd and Pt during PHAD. Under ambient conditions, Pd and Pt have distinct local structures. The Pd atomic pairs are more strained in CS NPs than in SS NPs. A similar behavior has been seen in CS NPs after PHAD. The Pd K-edge extended X-ray absorption fine structure data indicate that in CS and SS NPs a substantial fraction of the signal derives from Pd-Pd atomic pairs, indicating that Pd clusters remain present even after PHAD. PHAD causes a rearrangement of the interfacial structure, which becomes homogeneously distributed. The higher coverage of active bimetallic sites results in a higher observed hydrogen storage capacity in the SS phase.
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Research context

Nanomaterials

OpenAlex topics: Hydrogen Storage and Materials · Catalytic Processes in Materials Science · Electrocatalysts for Energy Conversion

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

Affiliations

Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany

Synchrotron X-ray Group, Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan

Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan

Department of Applied Quantum Physics and Nuclear Engineering and The Ultramicroscopy Research Center, Kyushu University, Fukuoka 819-0395, Japan

Department of Materials Science and Engineering, Tokyo Institute of Technology, Nagatsuta, Midori, Yokohama 226-8502, Japan

Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan

Funding

Accelerated Innovation Research Initiative Turning Top Science and Ideas into High-Impact Values · Japan Society for the Promotion of Science

References (32)

Show source-provided references
1. 10.1021/jacs.0c0480710.1021/jacs.0c04807 ↗
2. 10.1002/chem.20190392810.1002/chem.201903928 ↗
3. 10.1039/D0SC02351E10.1039/D0SC02351E ↗
4. 10.1021/acsami.9b1201710.1021/acsami.9b12017 ↗
5. 10.1021/am502344p10.1021/am502344p ↗
6. 10.1021/acsami.7b0133710.1021/acsami.7b01337 ↗
7. 10.1021/acsami.9b0092510.1021/acsami.9b00925 ↗
8. 10.1098/rstl.1866.001810.1098/rstl.1866.0018 ↗
9. 10.1016/0022-5088(76)90255-110.1016/0022-5088(76)90255-1 ↗
10. 10.1021/jp710447j10.1021/jp710447j ↗
11. 10.1016/j.synthmet.2005.07.29610.1016/j.synthmet.2005.07.296 ↗
12. 10.1021/ja710237210.1021/ja7102372 ↗
13. 10.1002/cphc.20090028910.1002/cphc.200900289 ↗
14. 10.1021/ja101316310.1021/ja1013163 ↗
15. 10.1038/s41598-017-14494-710.1038/s41598-017-14494-7 ↗
16. 10.1063/1.504066110.1063/1.5040661 ↗
17. 10.1016/j.jallcom.2019.03.34210.1016/j.jallcom.2019.03.342 ↗
18. 10.1063/1.508466210.1063/1.5084662 ↗
19. 10.1107/S090904950501271910.1107/S0909049505012719 ↗
20. 10.1103/PhysRevB.88.11513510.1103/PhysRevB.88.115135 ↗
21. Calvin, S. XAFS for Everyone; CRC Press, 2013; p 457.10.1201/b14843 ↗
22. 10.1039/b926434e10.1039/b926434e ↗
23. 10.1088/0953-8984/26/5/05540110.1088/0953-8984/26/5/055401 ↗
24. 10.1103/PhysRevB.13.326810.1103/PhysRevB.13.3268 ↗
25. 10.1103/PhysRevLett.40.72010.1103/PhysRevLett.40.720 ↗
26. 10.2138/rmg.2014.78.310.2138/rmg.2014.78.3 ↗
27. 10.1007/s11244-016-0612-010.1007/s11244-016-0612-0 ↗
28. 10.1038/ncomms858310.1038/ncomms8583 ↗
29. 10.1146/annurev-anchem-061010-11390610.1146/annurev-anchem-061010-113906 ↗
30. 10.2138/am-2003-042310.2138/am-2003-0423 ↗
31. 10.1021/acs.jpclett.5b0275310.1021/acs.jpclett.5b02753 ↗
32. 10.1021/ja052661810.1021/ja0526618 ↗