What question did this study set out to answer?

The research aims to enhance the performance of Pd/zeolite catalysts in the SCR of nitrogen oxides using hydrogen.

February 28, 2026Catalysis Science & Technology1 citationsOpen Access

Enhancing the Performance of Pd/zeolite-based H 2 -SCR Catalysts: The Role of Noble Metal Loading, Promoter Addition, and Combination with a Conventional Fe-BEA NH 3 -SCR Catalyst

MBMichael BorchersKarlsruhe Institute of Technology DHDaniel HodonjKarlsruhe Institute of Technology KSKathrin SchäferKarlsruhe Institute of Technology

Key Points

The research aims to enhance the performance of Pd/zeolite catalysts in the SCR of nitrogen oxides using hydrogen.
Evaluated different noble metal loadings on Pd/zeolite catalysts.
Investigated the addition of promoters to improve SCR performance.
Examined the combination of Pd/zeolite with a conventional Fe-BEA NH3-SCR catalyst.
Higher noble metal loading enhanced SCR activity.
Promoter addition further improved catalytic performance.
Combined catalysts showed synergistic effects in NOx reduction.

Abstract

The direct utilization of hydrogen (H 2 ) as a reductant in the selective catalytic reduction (SCR) of nitrogen oxides (NO x ) presents a promising strategy for mitigating emissions from hydrogen-fueled internal combustion...

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