In:
New Journal of Chemistry, Royal Society of Chemistry (RSC), Vol. 46, No. 12 ( 2022), p. 5464-5469
Abstract:
Electrochemical N 2 fixation using renewable electricity in water provides a renewable route for artificial NH 3 synthesis, whereas developing active and selective catalysts is highly necessary for an efficient N 2 reduction reaction (NRR) process. In this work, we report ultrasmall iridium nanoparticles on reduced graphene oxide (Ir/RGO) as an effective NRR electrocatalyst, achieving an NH 3 yield of 55.6 μg h −1 mg −1 with a faradaic efficiency of 15.3% at −0.3 V (RHE), outperforming most previously reported catalysts. Density functional theory calculations reveal that Ir is active for the NRR, while the RGO can further boost the NRR activity of supported Ir by imparting the enriched electrons on Ir that induce the upshift of the d-band center, resulting in enhanced N 2 adsorption and a decreased energy barrier for the potential-determining step.
Type of Medium:
Online Resource
ISSN:
1144-0546
,
1369-9261
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
1472933-7
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