Acid pretreatment of three-dimensional graphite cathodes enhances the hydrogen peroxide synthesis in bioelectrochemical systems

Nan Li; Shu Wang; Jingkun An; Yujie Feng

doi:10.1016/j.scitotenv.2018.02.135

Acid pretreatment of three-dimensional graphite cathodes enhances the hydrogen peroxide synthesis in bioelectrochemical systems

Nan Li
, Shu Wang
, Jingkun An
, Yujie Feng^*

^*Corresponding author for this work

Tianjin University

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

30 Scopus citations

Abstract

Graphite is a potential catalyst for hydrogen peroxide (H₂O₂) synthesis in bioelectrochemical systems (BESs) because of its high performance and low cost. In this study, acidic pretreatment method was performed on raw graphite powder to optimize the performance of three-dimensional graphite cathode and increase the H₂O₂ yield. Through this method, the production rate of H₂O₂ increased by 46.9% after 20% nitric acid (HNO₃) pretreatment and reached up to 1.55 mg·L⁻¹·h⁻¹, while the chemical oxygen demand (COD) removal efficiency increased by 54%. The high micropore surface area of the acid-pretreated graphite cathode (23.32 m²·g) enhanced the oxygen reduction reaction (ORR) in the electrode and subsequently increased the Faradic efficiency and maximum power density by 25% and 45%, respectively. Thus, this approach has potential for H₂O₂ synthesis.

Original language	English
Pages (from-to)	308-313
Number of pages	6
Journal	Science of the Total Environment
Volume	630
DOIs	https://doi.org/10.1016/j.scitotenv.2018.02.135
State	Published - 15 Jul 2018
Externally published	Yes

Keywords

COD removal efficiency
Hydrogen peroxide synthesis
Nitric acid pretreatment

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10.1016/j.scitotenv.2018.02.135

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@article{47892980d9bd406a914e2b2aae6eb1d9,

title = "Acid pretreatment of three-dimensional graphite cathodes enhances the hydrogen peroxide synthesis in bioelectrochemical systems",

abstract = "Graphite is a potential catalyst for hydrogen peroxide (H2O2) synthesis in bioelectrochemical systems (BESs) because of its high performance and low cost. In this study, acidic pretreatment method was performed on raw graphite powder to optimize the performance of three-dimensional graphite cathode and increase the H2O2 yield. Through this method, the production rate of H2O2 increased by 46.9\% after 20\% nitric acid (HNO3) pretreatment and reached up to 1.55 mg·L−1·h−1, while the chemical oxygen demand (COD) removal efficiency increased by 54\%. The high micropore surface area of the acid-pretreated graphite cathode (23.32 m2·g) enhanced the oxygen reduction reaction (ORR) in the electrode and subsequently increased the Faradic efficiency and maximum power density by 25\% and 45\%, respectively. Thus, this approach has potential for H2O2 synthesis.",

keywords = "COD removal efficiency, Hydrogen peroxide synthesis, Nitric acid pretreatment",

author = "Nan Li and Shu Wang and Jingkun An and Yujie Feng",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = jul,

day = "15",

doi = "10.1016/j.scitotenv.2018.02.135",

language = "英语",

volume = "630",

pages = "308--313",

journal = "Science of the Total Environment",

issn = "0048-9697",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Acid pretreatment of three-dimensional graphite cathodes enhances the hydrogen peroxide synthesis in bioelectrochemical systems

AU - Li, Nan

AU - Wang, Shu

AU - An, Jingkun

AU - Feng, Yujie

PY - 2018/7/15

Y1 - 2018/7/15

N2 - Graphite is a potential catalyst for hydrogen peroxide (H2O2) synthesis in bioelectrochemical systems (BESs) because of its high performance and low cost. In this study, acidic pretreatment method was performed on raw graphite powder to optimize the performance of three-dimensional graphite cathode and increase the H2O2 yield. Through this method, the production rate of H2O2 increased by 46.9% after 20% nitric acid (HNO3) pretreatment and reached up to 1.55 mg·L−1·h−1, while the chemical oxygen demand (COD) removal efficiency increased by 54%. The high micropore surface area of the acid-pretreated graphite cathode (23.32 m2·g) enhanced the oxygen reduction reaction (ORR) in the electrode and subsequently increased the Faradic efficiency and maximum power density by 25% and 45%, respectively. Thus, this approach has potential for H2O2 synthesis.

AB - Graphite is a potential catalyst for hydrogen peroxide (H2O2) synthesis in bioelectrochemical systems (BESs) because of its high performance and low cost. In this study, acidic pretreatment method was performed on raw graphite powder to optimize the performance of three-dimensional graphite cathode and increase the H2O2 yield. Through this method, the production rate of H2O2 increased by 46.9% after 20% nitric acid (HNO3) pretreatment and reached up to 1.55 mg·L−1·h−1, while the chemical oxygen demand (COD) removal efficiency increased by 54%. The high micropore surface area of the acid-pretreated graphite cathode (23.32 m2·g) enhanced the oxygen reduction reaction (ORR) in the electrode and subsequently increased the Faradic efficiency and maximum power density by 25% and 45%, respectively. Thus, this approach has potential for H2O2 synthesis.

KW - COD removal efficiency

KW - Hydrogen peroxide synthesis

KW - Nitric acid pretreatment

UR - https://www.scopus.com/pages/publications/85042352405

U2 - 10.1016/j.scitotenv.2018.02.135

DO - 10.1016/j.scitotenv.2018.02.135

M3 - 文章

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AN - SCOPUS:85042352405

SN - 0048-9697

VL - 630

SP - 308

EP - 313

JO - Science of the Total Environment

JF - Science of the Total Environment

ER -

Acid pretreatment of three-dimensional graphite cathodes enhances the hydrogen peroxide synthesis in bioelectrochemical systems

Abstract

Keywords

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