Journal
NEW JOURNAL OF CHEMISTRY
Volume 45, Issue 9, Pages 4246-4252Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj00005e
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Funding
- Science and Engineering Research Board (SERB), Department of Science & Technology, Govt. of India [EMR/20l6/006063]
- CSIR-NEERI [CSIR-NEERI/KRC/2020/MAY/CZC-ERMD/1]
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The synthesis of alloy PdCu nanoparticles supported on an Al2O3 support as a catalyst for effective removal of CO from H-2-rich flue gases was reported in this study. The alloy PdCu catalyst showed improved CO oxidation performance and selective CO oxidation below a temperature range of 300 degrees C.
Catalytic oxidation of carbon monoxide (CO) is one of the essential steps for several environment- and energy-related applications. Here, we report the synthesis of alloy PdCu nanoparticles supported on an Al2O3 support as a catalyst for effective removal of CO from H-2-rich flue gases. The alloy phase between Pd and Cu was formed by deposition of organometallic Pd- and Cu-precursors on the Al2O3 support followed by thermal reduction under H-2. The alloy PdCu nanoparticles (average size: 30 nm) are in a spherical shape and they are distributed in the range between 10 and 80 nm. The alloy PdCu catalyst showed improved CO oxidation performance both in the presence and absence of H-2 compared to that of the reference Pd catalyst. It is also inferred that the alloy PdCu catalyst showed an onset temperature (T-o) of 50 degrees C in the presence of H-2 compared to that of CO oxidation in the absence of H-2 (T-o = 100 degrees C). In addition, the alloy PdCu catalyst showed selective CO oxidation performance below a temperature range of 300 degrees C. Therefore, the formation of the Pd-based alloy structures may have potential as the preferential CO oxidation catalyst for the catalytic removal of CO from various flue gases.
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