Generating Defect-Rich Bismuth for Enhancing the Rate of Nitrogen Electroreduction to Ammonia.
Angew Chem Int Ed Engl
; 58(28): 9464-9469, 2019 Jul 08.
Article
en En
| MEDLINE
| ID: mdl-31090132
ABSTRACT
The electrochemical N2 fixation, which is far from practical application in aqueous solution under ambient conditions, is extremely challenging and requires a rational design of electrocatalytic centers. We observed that bismuth (Bi) might be a promising candidate for this task because of its weak binding with H adatoms, which increases the selectivity and production rate. Furthermore, we successfully synthesized defect-rich Bi nanoplates as an efficient noble-metal-free N2 reduction electrocatalyst via a low-temperature plasma bombardment approach. When exclusively using 1 Hâ
NMR measurements with N2 gas as a quantitative testing method, the defect-rich Bi(110) nanoplates achieved a 15 NH3 production rate of 5.453â
µg mgBi -1 h-1 and a Faradaic efficiency of 11.68 % at -0.6â
V vs. RHE in aqueous solution at ambient conditions.
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01-internacional
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MEDLINE
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En
Revista:
Angew Chem Int Ed Engl
Año:
2019
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Article