Journal
CHEMICAL COMMUNICATIONS
Volume 57, Issue 15, Pages 1891-1894Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc07346f
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Funding
- National Key R&D Program of China [2017YFC0211102, 2017YFC0211202]
- Tsinghua Scholarship for Overseas Graduate Studies [2019113]
- US DOE [DE-AC05-76RL01830]
- U.S. DOE/Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office
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A quasi-operando NH3 temperature-programmed reduction method (NH3-TPR) has been developed to quantify total Cu(ii) ions in Cu-SSZ-13 quenched from SCR-relevant reactions, and its accuracy has been confirmed by in situ EPR. The different reducibility of [Cu(OH)](+)-Z and Cu2+-2Z in SCR can be further distinguished by NH3 reduction temperatures.
A quasi-operando NH3 temperature-programmed reduction method (NH3-TPR), with N-2:Cu = 1:1, is developed to quantify total Cu(ii) ions in Cu-SSZ-13 quenched from SCR-relevant reactions, and its accuracy is confirmed by in situ EPR. [Cu(OH)](+)-Z and Cu2+-2Z can be further distinguished by NH3 reduction temperatures, and their different reducibility in SCR is revealed.
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