Highly Active and Sintering-Resistant Pt Clusters Supported on FeOx-Hydroxyapatite Achieved by Tailoring Strong Metal-Support Interactions

Yunxia Liu; Guandong Wu; Rile Ge; Xunzhu Jiang; Lin Li; Tamao Ishida; Toru Murayama; Botao Qiao; Junhu Wang

doi:10.1021/acsami.4c02521

Highly Active and Sintering-Resistant Pt Clusters Supported on FeO_x-Hydroxyapatite Achieved by Tailoring Strong Metal-Support Interactions

ACS Appl Mater Interfaces. 2024 May 1;16(17):22007-22015. doi: 10.1021/acsami.4c02521. Epub 2024 Apr 17.

Authors

Yunxia Liu^{1

2

3}, Guandong Wu^{1

2}, Rile Ge^{1

2}, Xunzhu Jiang^{1

3}, Lin Li¹, Tamao Ishida⁴, Toru Murayama^{4

5}, Botao Qiao¹, Junhu Wang^{1

2}

Affiliations

¹ CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
² Mössbauer Effect Data Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
³ University of Chinese Academy of Sciences, Beijing 100049, China.
⁴ Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-osawa, Hachioji, Tokyo 192-0397, Japan.
⁵ Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology (AU-SDARC), School of Chemistry & Chemical Engineering, Yantai University, 30 Qingquan Road, Yantai 264005, China.

PMID: 38629801
DOI: 10.1021/acsami.4c02521

Abstract

The catalytic performance of supported metal catalysts is closely related to their structure. While Pt-based catalysts are widely used in many catalytic reactions because of their exceptional intrinsic activity, they tend to deactivate in high-temperature reactions, requiring a tedious and expensive regeneration process. The strong metal-support interaction (SMSI) is a promising strategy to improve the stability of supported metal nanoparticles, but often at the price of the activity due to either the coverage of the active sites by support overlay and/or the too-strong metal-support bonding. Herein, we newly constructed a supported Pt cluster catalyst by introducing FeO_x into hydroxyapatite (HAP) support to fine-tune the SMSIs. The catalyst exhibited not only high catalytic activity but also sintering resistance, without deactivation in a 100 h test for catalytic CO oxidation. Detailed characterizations reveal that FeO_x introduced into HAP weaken the strong covalent metal-support interaction (CMSI) between Pt and FeO_x while simultaneously inhibiting the oxidative strong metal-support interaction (OMSI) between Pt and HAP, giving rise to both high activity and thermal stability of the supported Pt clusters.

Keywords: composite support; hydroxyapatite; oxidative strong metal−support interaction; platinum catalysis; strong covalent metal−support interaction.