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Ni 2 P active site ensembles tune electrocatalytic nitrate reduction selectivity.

Emily NishiwakiPeter S RiceDing-Yuan KuoFlorence Y DouAnthony PykaBryce ReidHao A NguyenEric M StuveSimone RaugeiBrandi M Cossairt
Published in: Chemical communications (Cambridge, England) (2024)
We demonstrate that active site ensembles on transition metal phosphides tune the selectivity of the nitrate reduction reaction. Using Ni 2 P nanocrystals as a case study, we report a mechanism involving competitive co-adsorption of H* and NO x * intermediates. A near 100% faradaic efficiency for nitrate reduction over hydrogen evolution is observed at -0.4 V, while NH 3 selectivity is maximized at -0.2 V vs. RHE.
Keyphrases
  • transition metal
  • nitric oxide
  • drinking water
  • room temperature
  • structural basis
  • quantum dots