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

Autor: Ying Sun, Qin Zhao, Da-Ming Feng, Wei Zhang, Deng Zizhao, Zi-Hang Huang, Hui Li, Zhao-Qing Liu, Tianyi Ma, Xi Ming Song
Rok vydání: 2020
Předmět:
Zdroj: Nano-Micro Letters, Vol 12, Iss 1, Pp 1-12 (2020)
Nano-Micro Letters
ISSN: 2150-5551
2311-6706
DOI: 10.1007/s40820-020-00444-y
Popis: Highlights The Bi2O3 nanoplates homogeneously decorated free-standing exfoliated graphene (Bi2O3/FEG) was prepared by a facile electrochemical deposition method.The Bi2O3/FEG first used as nitrogen reduction electrocatalyst exhibits excellent electrocatalysis performance and stability for nitrogen reduction reaction in neutral media.The superior electrocatalytic nitrogen reduction activity is attributed to the strong interaction of the Bi 6p band with the N 2p orbitals, binder-free nature of the electrodes, and facile electron transfer through the graphene nanosheets. Electronic supplementary material The online version of this article (10.1007/s40820-020-00444-y) contains supplementary material, which is available to authorized users.
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 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \upmu{\text{g}}_{{{\text{NH}}_{3} }} $$\end{document}μgNH3 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. Electronic supplementary material The online version of this article (10.1007/s40820-020-00444-y) contains supplementary material, which is available to authorized users.
Databáze: OpenAIRE
Externí odkaz: