Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-Nitrophenol

Hierarchically porous carbon (PC) was synthesized by a templating method, using magnesium salts (Mg(HCO<sub>3</sub>)<sub>2</sub>, MgC<sub>2</sub>O<sub>4</sub> and MgO) as template precursors and citric acid as carbon precursor. During the carbonization...

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Main Authors: Wanyi Gan, Ping Xiao, Junjiang Zhu
Format: Article
Language:English
Published: MDPI AG 2023-07-01
Series:Catalysts
Subjects:
Online Access:https://www.mdpi.com/2073-4344/13/7/1132
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author Wanyi Gan
Ping Xiao
Junjiang Zhu
author_facet Wanyi Gan
Ping Xiao
Junjiang Zhu
author_sort Wanyi Gan
collection DOAJ
description Hierarchically porous carbon (PC) was synthesized by a templating method, using magnesium salts (Mg(HCO<sub>3</sub>)<sub>2</sub>, MgC<sub>2</sub>O<sub>4</sub> and MgO) as template precursors and citric acid as carbon precursor. During the carbonization process, besides the production of MgO particles, many gases (e.g., CO<sub>2</sub>/NO<sub>2</sub>/H<sub>2</sub>O) were also released and acted as a porogen to generate pores in carbon. The resulting composite (MgO@C) was subsequently treated with HCl solution to remove the MgO templates, yielding hierarchically porous carbon. The surface oxygen functional groups over porous carbon were characterized by TPD and XPS, which showed that the PC-bic, synthesized using Mg(HCO<sub>3</sub>)<sub>2</sub> as the template precursor, had the highest value among the PCs. As expected, the PC-bic exhibited the best performances for electrocatalytic reduction of 4-nitrophenol, with a peak current of −135.5 μA at −0.679 V. The effects of 4-nitrophenol concentration, buffer solution pH and scanning rate on the electrocatalytic activities, as well as the stability of PC-bic for the reaction were investigated.
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spelling doaj.art-56f9fce38a99420a809a08262334e3852023-11-18T18:45:14ZengMDPI AGCatalysts2073-43442023-07-01137113210.3390/catal13071132Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-NitrophenolWanyi Gan0Ping Xiao1Junjiang Zhu2Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, ChinaHubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, ChinaHubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, ChinaHierarchically porous carbon (PC) was synthesized by a templating method, using magnesium salts (Mg(HCO<sub>3</sub>)<sub>2</sub>, MgC<sub>2</sub>O<sub>4</sub> and MgO) as template precursors and citric acid as carbon precursor. During the carbonization process, besides the production of MgO particles, many gases (e.g., CO<sub>2</sub>/NO<sub>2</sub>/H<sub>2</sub>O) were also released and acted as a porogen to generate pores in carbon. The resulting composite (MgO@C) was subsequently treated with HCl solution to remove the MgO templates, yielding hierarchically porous carbon. The surface oxygen functional groups over porous carbon were characterized by TPD and XPS, which showed that the PC-bic, synthesized using Mg(HCO<sub>3</sub>)<sub>2</sub> as the template precursor, had the highest value among the PCs. As expected, the PC-bic exhibited the best performances for electrocatalytic reduction of 4-nitrophenol, with a peak current of −135.5 μA at −0.679 V. The effects of 4-nitrophenol concentration, buffer solution pH and scanning rate on the electrocatalytic activities, as well as the stability of PC-bic for the reaction were investigated.https://www.mdpi.com/2073-4344/13/7/1132hierarchically porous carbontemplating methodmagnesium saltselectrocatalytic reduction4-nitrophenol
spellingShingle Wanyi Gan
Ping Xiao
Junjiang Zhu
Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-Nitrophenol
Catalysts
hierarchically porous carbon
templating method
magnesium salts
electrocatalytic reduction
4-nitrophenol
title Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-Nitrophenol
title_full Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-Nitrophenol
title_fullStr Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-Nitrophenol
title_full_unstemmed Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-Nitrophenol
title_short Templating Synthesis of Hierarchically Porous Carbon with Magnesium Salts for Electrocatalytic Reduction of 4-Nitrophenol
title_sort templating synthesis of hierarchically porous carbon with magnesium salts for electrocatalytic reduction of 4 nitrophenol
topic hierarchically porous carbon
templating method
magnesium salts
electrocatalytic reduction
4-nitrophenol
url https://www.mdpi.com/2073-4344/13/7/1132
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