Nitrogen-impregnated carbon-coated TiO2 nanoparticles for N2 reduction to ammonia under ambient conditions

Dohun Kim; Subramani Surendran; Gnanaprakasam Janani; Yoongu Lim; Hyeonuk Choi; Mi Kyung Han; Subramanian Yuvaraj; Tae Hoon Kim; Jung Kyu Kim; Uk Sim

doi:10.1016/j.matlet.2022.131808

Nitrogen-impregnated carbon-coated TiO₂ nanoparticles for N₂ reduction to ammonia under ambient conditions

Dohun Kim
, Subramani Surendran
, Gnanaprakasam Janani
, Yoongu Lim
, Hyeonuk Choi
, Mi Kyung Han
, Subramanian Yuvaraj
, Tae Hoon Kim
, Jung Kyu Kim
, Uk Sim

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

Abstract

Various methods for ammonia production are being studied world wide. The electrochemical nitrogen reduction reaction (eNRR) has been considered an ideal eco-friendly approach for ammonia production. In this study, we proposed a nitrogen-impregnated carbon coating strategy to increase the activity of TiO₂-based catalysts for eNRR. Electrochemical measurements revealed that TiO₂@N-C resulted in a higher ammonia yield rate (5.302 μg h⁻¹ cm⁻²) and enhanced Faradaic efficiency (2.46%) at −0.1 V vs. reversible hydrogen electrode in 0.1 M KOH electrolyte. The N-impregnated carbon coating enhanced electron conductivity and electrocatalytic activity, which indicates better performance of the eNRR.

Original language	English
Article number	131808
Journal	Materials Letters
Volume	314
DOIs	https://doi.org/10.1016/j.matlet.2022.131808
State	Published - 1 May 2022

Keywords

Ammonia synthesis
Electrocatalysts
Electrochemical nitrogen reduction reaction (eNRR)
Nitrogen-rich carbon
TiO

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10.1016/j.matlet.2022.131808

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title = "Nitrogen-impregnated carbon-coated TiO2 nanoparticles for N2 reduction to ammonia under ambient conditions",

abstract = "Various methods for ammonia production are being studied world wide. The electrochemical nitrogen reduction reaction (eNRR) has been considered an ideal eco-friendly approach for ammonia production. In this study, we proposed a nitrogen-impregnated carbon coating strategy to increase the activity of TiO2-based catalysts for eNRR. Electrochemical measurements revealed that TiO2@N-C resulted in a higher ammonia yield rate (5.302 μg h−1 cm−2) and enhanced Faradaic efficiency (2.46\%) at −0.1 V vs. reversible hydrogen electrode in 0.1 M KOH electrolyte. The N-impregnated carbon coating enhanced electron conductivity and electrocatalytic activity, which indicates better performance of the eNRR.",

keywords = "Ammonia synthesis, Electrocatalysts, Electrochemical nitrogen reduction reaction (eNRR), Nitrogen-rich carbon, TiO",

author = "Dohun Kim and Subramani Surendran and Gnanaprakasam Janani and Yoongu Lim and Hyeonuk Choi and Han, \{Mi Kyung\} and Subramanian Yuvaraj and Kim, \{Tae Hoon\} and Kim, \{Jung Kyu\} and Uk Sim",

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doi = "10.1016/j.matlet.2022.131808",

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T1 - Nitrogen-impregnated carbon-coated TiO2 nanoparticles for N2 reduction to ammonia under ambient conditions

AU - Kim, Dohun

AU - Surendran, Subramani

AU - Janani, Gnanaprakasam

AU - Lim, Yoongu

AU - Choi, Hyeonuk

AU - Han, Mi Kyung

AU - Yuvaraj, Subramanian

AU - Kim, Tae Hoon

AU - Kim, Jung Kyu

AU - Sim, Uk

PY - 2022/5/1

Y1 - 2022/5/1

N2 - Various methods for ammonia production are being studied world wide. The electrochemical nitrogen reduction reaction (eNRR) has been considered an ideal eco-friendly approach for ammonia production. In this study, we proposed a nitrogen-impregnated carbon coating strategy to increase the activity of TiO2-based catalysts for eNRR. Electrochemical measurements revealed that TiO2@N-C resulted in a higher ammonia yield rate (5.302 μg h−1 cm−2) and enhanced Faradaic efficiency (2.46%) at −0.1 V vs. reversible hydrogen electrode in 0.1 M KOH electrolyte. The N-impregnated carbon coating enhanced electron conductivity and electrocatalytic activity, which indicates better performance of the eNRR.

AB - Various methods for ammonia production are being studied world wide. The electrochemical nitrogen reduction reaction (eNRR) has been considered an ideal eco-friendly approach for ammonia production. In this study, we proposed a nitrogen-impregnated carbon coating strategy to increase the activity of TiO2-based catalysts for eNRR. Electrochemical measurements revealed that TiO2@N-C resulted in a higher ammonia yield rate (5.302 μg h−1 cm−2) and enhanced Faradaic efficiency (2.46%) at −0.1 V vs. reversible hydrogen electrode in 0.1 M KOH electrolyte. The N-impregnated carbon coating enhanced electron conductivity and electrocatalytic activity, which indicates better performance of the eNRR.

KW - Ammonia synthesis

KW - Electrocatalysts

KW - Electrochemical nitrogen reduction reaction (eNRR)

KW - Nitrogen-rich carbon

KW - TiO

UR - https://www.scopus.com/pages/publications/85124021696

U2 - 10.1016/j.matlet.2022.131808

DO - 10.1016/j.matlet.2022.131808

M3 - Article

AN - SCOPUS:85124021696

SN - 0167-577X

VL - 314

JO - Materials Letters

JF - Materials Letters

M1 - 131808

ER -

Nitrogen-impregnated carbon-coated TiO₂ nanoparticles for N₂ reduction to ammonia under ambient conditions

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Keywords

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