Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 50, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202212489
Keywords
Porosity; Preferential Oxidation; Pt Cluster; Single Crystal
Categories
Funding
- National Key Research and Development Program of China [2021YFA1501500]
- Natural Science Foundation of China [91845202]
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Researchers fabricated nanoporous single-crystalline oxide monoliths as catalysts for the preferential oxidation of CO in H-2 fuel. This technology achieved efficient CO removal across a wide temperature range and demonstrated stable power output for over 400 hours.
Preferential oxidation of CO in H-2 (PROX) reaction is a promising solution to the on-board purification of CO-contaminated H-2 fuel for use in next-generation proton-exchange membrane fuel cells (PEMFC). However, achieving high CO selectivity, activity and structural stability across the wide temperature window remains a great challenge. Herein, we fabricate centimeter scale interfacial PROX catalysts grown from nanoporous single-crystalline Pr2O3 and Nd2O3 monoliths with lattice surface-deposited Pt clusters at nanoscale. We demonstrate complete and selective removal of CO in H-2 over an unprecedented wide temperature window (253-403 K). The monoliths are integrated with an operational PEMFC to purify the H-2 fuel contaminated with CO (30 ppm) and enable stable power output for >400 h; over two thousand times longer than without. This work demonstrates that the nanoporous single-crystalline oxide monoliths can simultaneously achieve the stability and overall performance required to realize practically useful PEMFCs.
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