期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 623, 期 -, 页码 513-519出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.04.173
关键词
Ag nanoarray; Ammonia synthesis; Electrocatalysis; Nitrite reduction reaction; NiO nanosheets
资金
- National Natural Science Foundation of China [22072015]
- Deanship of Scientific Research at King Khalid University, Abha, Saudi Arabia [RGP.2/79/43]
In this study, an efficient electrocatalyst consisting of Ag nanoarray and NiO nanosheets array on carbon cloth as support was reported for the selective reduction of nitrite to ammonia. The catalyst exhibited high ammonia yield and Faradaic efficiency in alkaline solution.
Electrochemical reduction of nitrite to ammonia can simultaneously achieve ammonia synthesis and N-contaminant removal under mild conditions, which has attracted widespread attention but still lacks efficient catalysts. In this work, Ag nanoarray using NiO nanosheets array on carbon cloth as support is reported as an efficient electrocatalyst to selectively reduce nitrite to ammonia. In 0.1 M NaOH with 0.1 M NO2-, such catalyst exhibits a maximum ammonia yield of 5,751 lg h(-1) cm(-2) (57,510 lg h(-1) mg(Ag)(-1)) and high Faradaic efficiency up to 97.7 %. Density functional theory calculations applied to uncover the catalytic mechanism of NO2- reduction reaction on Ag. (c) 2022 Elsevier Inc. All rights reserved.
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