Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 18, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202202087
Keywords
Boron Carbide; Density Functional Theory; Electrocalysis; NH3 Production; Nitric Oxide Reduction Reaction
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Funding
- National Natural Science Foundation of China [21575137]
- Opening Fund of Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Hunan Normal University), Ministry of Education [2020-02]
- King Saud University, Riyadh (Saudi Arabia) [RSP-2021/163]
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In this study, an amorphous B2.6C supported on a TiO2 nanoarray was developed as a nanocatalyst for NH3 production. It exhibited high activity and durability in NO electroreduction compared to other catalysts. Additionally, a Zn-NO battery based on this catalyst achieved high power density and NH3 yield.
Electrocatalytic NO reduction is regarded as an attractive strategy to degrade the NO contaminant into useful NH3, but the lack of efficient and stable electrocatalysts to facilitate such multiple proton-coupled electron-transfer processes impedes its applications. Here, we report on developing amorphous B2.6C supported on a TiO2 nanoarray on a Ti plate (a-B2.6C@TiO2/Ti) as an NH3-producing nanocatalyst with appreciable activity and durability toward the NO electroreduction. It shows a yield of 3678.6 mu g h(-1) cm(-2) and a FE of 87.6 %, superior to TiO2/Ti (563.5 mu g h(-1) cm(-2), 42.6 %) and a-B2.6C/Ti (2499.2 mu g h(-1) cm(-2), 85.6 %). An a-B2.6C@TiO2/Ti-based Zn-NO battery achieves a power density of 1.7 mW cm(-2) with an NH3 yield of 1125 mu g h(-1) cm(-2). An in-depth understanding of catalytic mechanisms is gained by theoretical calculations.
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