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Tetrahedral W 4 cluster confined in graphene-like C 2 N enables electrocatalytic nitrogen reduction from theoretical perspective

Journal Article · · Nanotechnology

Abstract Exploring the format of active site is essential to further the understanding of an electrocatalyst working under ambient conditions. Herein, we present a DFT study of electrocatalytic nitrogen reduction (eNRR) on W4tetrahedron embedded in graphene-like C2N (denoted as W4@C2N). Our results demonstrate that N-affinity of active sites on W4dominate over single-atom site, rendering *NH2 + (H+ + e-) →*NH3invariably the potential-determining step (PDS) of eNRR via consecutive or distal route (UL = -0.68 V) to ammonia formation. However, *NHNH2 + (H+ + e-) →*NH2NH2has become the PDS (UL = -0.54 V) via enzymatic route towards NH2NH2formation and thereafter desorption, making W4@C2N a potentially promising catalyst for hydrazine production from eNRR. Furthermore, eNRR is competitive with hydrogen evolution reaction (UL = -0.78 V) on W4@C2N, which demonstrated sufficient thermal stability and electric property for electrode application.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
SC0012704
OSTI ID:
1982444
Journal Information:
Nanotechnology, Vol. 33, Issue 24; ISSN 0957-4484
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

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