Bismuth-Based Free-Standing Electrodes for Ambient-Condition Ammonia Production in Neutral Media

Autor: Ying Sun, Zizhao Deng, Xi-Ming Song, Hui Li, Zihang Huang, Qin Zhao, Daming Feng, Wei Zhang, Zhaoqing Liu, Tianyi Ma
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Nano-Micro Letters, Vol 12, Iss 1, Pp 1-12 (2020)
Druh dokumentu: article
ISSN: 2311-6706
2150-5551
DOI: 10.1007/s40820-020-00444-y
Popis: Abstract Electrocatalytic nitrogen reduction reaction is a carbon-free and energy-saving strategy for efficient synthesis of ammonia under ambient conditions. Here, we report the synthesis of nanosized Bi2O3 particles grown on functionalized exfoliated graphene (Bi2O3/FEG) via a facile electrochemical deposition method. The obtained free-standing Bi2O3/FEG achieves a high Faradaic efficiency of 11.2% and a large NH3 yield of 4.21 ± 0.14 $$ \upmu{\text{g}}_{{{\text{NH}}_{3} }} $$ μ g NH 3 h−1 cm−2 at − 0.5 V versus reversible hydrogen electrode in 0.1 M Na2SO4, better than that in the strong acidic and basic media. Benefiting from its strong interaction of Bi 6p band with the N 2p orbitals, binder-free characteristic, and facile electron transfer, Bi2O3/FEG achieves superior catalytic performance and excellent long-term stability as compared with most of the previous reported catalysts. This study is significant to design low-cost, high-efficient Bi-based electrocatalysts for electrochemical ammonia synthesis.
Databáze: Directory of Open Access Journals
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