Sub-nanometric High-Entropy Alloy Cluster: Hydrogen Spillover Driven Synthesis on CeO2 and Structural Reversibility

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Authors

Naoki Hashimoto − Division of Materials and Manufacturing

Science, Graduate School of Engineering, Osaka University,

Suita, Osaka 565-0871, Japan

Shuichiro Matsuzaki − Division of Materials and

Manufacturing Science, Graduate School of Engineering,

Osaka University, Suita, Osaka 565-0871, Japan

Kazuki Iwama − Division of Materials and Manufacturing

Science, Graduate School of Engineering, Osaka University,

Suita, Osaka 565-0871, Japan

Ryota Kitaura − Division of Materials and Manufacturing

Science, Graduate School of Engineering, Osaka University,

Suita, Osaka 565-0871, Japan

Naoto Kamiuchi − The Institute of Scientific and Industrial

Research, Osaka University, Osaka 567-0047, Japan;

orcid.org/0000-0002-4145-5226

Hideto Yoshida − The Institute of Scientific and Industrial

Research, Osaka University, Osaka 567-0047, Japan

Hiromi Yamashita − Division of Materials and Manufacturing

Science, Graduate School of Engineering, Osaka University,

Suita, Osaka 565-0871, Japan; Innovative Catalysis Science

Division, Institute for Open and Transdisciplinary Research

Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 5650871, Japan

Complete contact information is available at:

https://pubs.acs.org/10.1021/jacsau.3c00210

Author Contributions

N.H. performed the catalyst preparation, calculation, and

characterization, and wrote the manuscript. K.M. supervised

the project. S.M., K.I., and R.K. helped with the catalyst

preparation and characterization. N.K. and H.Y. performed the

HAADF-STEM and EDX measurements. H.Y. helped to

supervise the project. The manuscript was written through

discussions with all authors. All authors have given approval to

the final version of the manuscript. CRediT: Naoki

Hashimoto investigation, writing-original draft; Kohsuke

Mori investigation, supervision, writing-review & editing;

Shuichiro Matsuzaki investigation; Kazuki Iwama investigation; Ryota Kitaura investigation; Naoto Kamiuchi investigation; Hideto Yoshida investigation; Hiromi Yamashita

supervision.

Notes

The authors declare no competing financial interest.

ACKNOWLEDGMENTS

The present work was supported by the Kakenhi Grant-in-Aid

for Transformative Research Areas(B) (No. 21B206). N.H.

thanks JSPS for a Research Fellowship for Young Scientists

(No. 22J20599). We acknowledge Hitachi High-Technologies

Corporation for their assistance with the Cs-corrected SEM

measurements (HF 5000). A part of TEM experiment was

carried out by using a facility in the Research Center for UltraHigh Voltage Electron Microscopy, Osaka University. The

synchrotron radiation experiments for XAFS measurements

were performed at the BL01B1 beamline in SPring-8 with the

approval from JASRI (2022A1076 and 2021B1096).

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