Synergistic effects of Pd single atoms and nanoclusters boosting SnO2 gas sensing performance

Ozbakir, Yaprak; Xia, Yong; Pan, Aifei; Hong, Jiyun; Perez-Aguilar, Jorge E.; Bare, Simon R.; Rossi, Francesca; Dhall, Rohan; Alghannam, Afnan Ali; Goel, Nishit; Bart, Stephen; Carraro, Carlo; Maboudian, Roya

doi:10.1039/d4tc04761c

Title: Synergistic effects of Pd single atoms and nanoclusters boosting SnO₂ gas sensing performance

Journal Article · Wed Jan 01 00:00:00 UTC 2025 · Journal of Materials Chemistry C

DOI: https://doi.org/10.1039/d4tc04761c · OSTI ID:2530202

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Univ. of California, Berkeley, CA (United States); Berkeley Sensor & Actuator Center, Berkeley, CA (United States)
Xi'an Jiaotong Univ. (China)
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Institute of Materials for Electronics and Magnetism (IMEM), Parma (Italy); National Research Council (CNR), Parma (Italy)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Center for Electron Microscopy (NCEM)
Univ. of California, Berkeley, CA (United States)
TDK InvenSense Inc., San Jose, CA (United States)

Tin(IV) oxide-supported Pd is a promising heterogenous catalyst for CO oxidation relevant for environmental cleanup reactions. In this study, an atomically dispersed Pd catalyst on SnO₂ (ADC Pd/SnO₂) hybrid material is successfully synthesized via a straightforward wet chemistry method and is found to exhibit superior performance toward CO sensing. Ex situ EXAFS analysis confirms the formation of single Pd atoms and small Pd nanoclusters stabilized on the SnO₂(110) surface. Further, the material exhibits high efficiency in generating adsorbed O₂^- as well as high activity in catalyzing CO oxidation at low temperatures, resulting in exceptional sensitivity and selectivity toward CO in comparison to pure SnO₂ and Pd nanoparticles loaded on SnO₂ respectively. In situ FTIR measurements unravel CO adsorption kinetics on ADC Pd/SnO₂ under reaction conditions, and a possible sensing mechanism is put forth in which CO is transformed into CO₂ by reaction with active oxygen species; and concurrently, carbon-related species (bicarbonates and carbonates) are formed and decomposed into CO₂.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 2530202

Journal Information:: Journal of Materials Chemistry C, Journal Name: Journal of Materials Chemistry C Journal Issue: 12 Vol. 13; ISSN 2050-7526

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Synergistic effects of Pd single atoms and nanoclusters boosting SnO2 gas sensing performance

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Title: Synergistic effects of Pd single atoms and nanoclusters boosting SnO₂ gas sensing performance