In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 6 ( 2022), p. 2819-2825
Abstract:
Ammonia has received widespread attention as an indispensable chemical for humans and a potential energy source for a future low-carbon society. To meet the urgent requirements for a high output of synthetic ammonia by the electrocatalytic nitrogen reduction reaction (ENRR), the design of robust catalysts has become particularly important. Adjusting the charge and spin configuration of catalysts is a novel and effective way to optimize the ENRR barrier. We found that, through doping Co atoms, there was a correlation between the effective spin magnetic moment of the Co-LNO (Co-doped LaNiO 3 ) catalyst and its catalytic performance for the ENRR. Uniquely, LaNi 0.995 Co 0.005 O 3− δ with a high spin configuration was endowed with an excellent ENRR performance, including a high ammonia yield rate of 14.57 μg h −1 mg −1 , an outstanding faradaic efficiency of 26.44%, and a remarkable energy efficiency of 21.35% (−0.1 V vs. the reversible hydrogen electrode). According to density functional theory calculations, we infer that Co-LNO provides Co with catalytically active sites and the accompanying oxygen vacancies to adjust the electronic structure and promote N 2 adsorption and the first protonation to form *NNH.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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