An efficient bifunctional electrocatalyst derived from layer-by-layer self-assembly of a three-dimensional porous Co-N-C@graphene

Shichang Cai, Rui Wang, William Michael Yourey, Junsheng Li, Haining Zhang, Haolin Tang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Three-dimensional (3D) porous carbon-based materials with tunable composition and microstructure are of great interest for the development of oxygen involved electrocatalytic reactions. Here, we report the synthesis of 3D porous carbon-based electrocatalyst by self-assembling Co-metal organic frameworks (MOF) building blocks on graphene via a layer-by-layer technique. Precise control of the structure and morphology is achieved by varying the MOF layer to tune the electrocatalytic properties. The as-produced electrocatalyst exhibits an excellent catalytic activity for the oxygen reduction reaction in 0.1 mol L−1 KOH, showing a high onset potential of 0.963 V vs. reversible hydrogen electrode (RHE) and a low tafel slope of 54 mV dec−1, compared to Pt/C (0.934 V and 52 mV dec−1, respectively). Additionally, it shows a slightly lower potential vs. RHE (1.72 V) than RuO2 (1.75 V) at 10 mA cm−2 in an alkaline electrolyte. A rechargeable Zn-air battery based on the as-produced 3D porous catalyst demonstrates a high peak power density of 119 mW cm−2 at a cell voltage of 0.578 V while retaining an excellent stability over 250 charge-discharge cycles.

Original languageEnglish (US)
Pages (from-to)968-975
Number of pages8
JournalScience Bulletin
Volume64
Issue number14
DOIs
StatePublished - Jul 30 2019

Fingerprint

Graphite
Electrocatalysts
Self assembly
Hydrogen
Carbon
Metals
Oxygen
Electrodes
Electrolytes
Catalyst activity
Microstructure
Catalysts
Electric potential
Air
Chemical analysis

All Science Journal Classification (ASJC) codes

  • General

Cite this

Cai, Shichang ; Wang, Rui ; Yourey, William Michael ; Li, Junsheng ; Zhang, Haining ; Tang, Haolin. / An efficient bifunctional electrocatalyst derived from layer-by-layer self-assembly of a three-dimensional porous Co-N-C@graphene. In: Science Bulletin. 2019 ; Vol. 64, No. 14. pp. 968-975.
@article{eecc6350d49643978441b6169bc69273,
title = "An efficient bifunctional electrocatalyst derived from layer-by-layer self-assembly of a three-dimensional porous Co-N-C@graphene",
abstract = "Three-dimensional (3D) porous carbon-based materials with tunable composition and microstructure are of great interest for the development of oxygen involved electrocatalytic reactions. Here, we report the synthesis of 3D porous carbon-based electrocatalyst by self-assembling Co-metal organic frameworks (MOF) building blocks on graphene via a layer-by-layer technique. Precise control of the structure and morphology is achieved by varying the MOF layer to tune the electrocatalytic properties. The as-produced electrocatalyst exhibits an excellent catalytic activity for the oxygen reduction reaction in 0.1 mol L−1 KOH, showing a high onset potential of 0.963 V vs. reversible hydrogen electrode (RHE) and a low tafel slope of 54 mV dec−1, compared to Pt/C (0.934 V and 52 mV dec−1, respectively). Additionally, it shows a slightly lower potential vs. RHE (1.72 V) than RuO2 (1.75 V) at 10 mA cm−2 in an alkaline electrolyte. A rechargeable Zn-air battery based on the as-produced 3D porous catalyst demonstrates a high peak power density of 119 mW cm−2 at a cell voltage of 0.578 V while retaining an excellent stability over 250 charge-discharge cycles.",
author = "Shichang Cai and Rui Wang and Yourey, {William Michael} and Junsheng Li and Haining Zhang and Haolin Tang",
year = "2019",
month = "7",
day = "30",
doi = "10.1016/j.scib.2019.05.020",
language = "English (US)",
volume = "64",
pages = "968--975",
journal = "Science Bulletin",
issn = "2095-9273",
publisher = "Springer Science + Business Media",
number = "14",

}

An efficient bifunctional electrocatalyst derived from layer-by-layer self-assembly of a three-dimensional porous Co-N-C@graphene. / Cai, Shichang; Wang, Rui; Yourey, William Michael; Li, Junsheng; Zhang, Haining; Tang, Haolin.

In: Science Bulletin, Vol. 64, No. 14, 30.07.2019, p. 968-975.

Research output: Contribution to journalArticle

TY - JOUR

T1 - An efficient bifunctional electrocatalyst derived from layer-by-layer self-assembly of a three-dimensional porous Co-N-C@graphene

AU - Cai, Shichang

AU - Wang, Rui

AU - Yourey, William Michael

AU - Li, Junsheng

AU - Zhang, Haining

AU - Tang, Haolin

PY - 2019/7/30

Y1 - 2019/7/30

N2 - Three-dimensional (3D) porous carbon-based materials with tunable composition and microstructure are of great interest for the development of oxygen involved electrocatalytic reactions. Here, we report the synthesis of 3D porous carbon-based electrocatalyst by self-assembling Co-metal organic frameworks (MOF) building blocks on graphene via a layer-by-layer technique. Precise control of the structure and morphology is achieved by varying the MOF layer to tune the electrocatalytic properties. The as-produced electrocatalyst exhibits an excellent catalytic activity for the oxygen reduction reaction in 0.1 mol L−1 KOH, showing a high onset potential of 0.963 V vs. reversible hydrogen electrode (RHE) and a low tafel slope of 54 mV dec−1, compared to Pt/C (0.934 V and 52 mV dec−1, respectively). Additionally, it shows a slightly lower potential vs. RHE (1.72 V) than RuO2 (1.75 V) at 10 mA cm−2 in an alkaline electrolyte. A rechargeable Zn-air battery based on the as-produced 3D porous catalyst demonstrates a high peak power density of 119 mW cm−2 at a cell voltage of 0.578 V while retaining an excellent stability over 250 charge-discharge cycles.

AB - Three-dimensional (3D) porous carbon-based materials with tunable composition and microstructure are of great interest for the development of oxygen involved electrocatalytic reactions. Here, we report the synthesis of 3D porous carbon-based electrocatalyst by self-assembling Co-metal organic frameworks (MOF) building blocks on graphene via a layer-by-layer technique. Precise control of the structure and morphology is achieved by varying the MOF layer to tune the electrocatalytic properties. The as-produced electrocatalyst exhibits an excellent catalytic activity for the oxygen reduction reaction in 0.1 mol L−1 KOH, showing a high onset potential of 0.963 V vs. reversible hydrogen electrode (RHE) and a low tafel slope of 54 mV dec−1, compared to Pt/C (0.934 V and 52 mV dec−1, respectively). Additionally, it shows a slightly lower potential vs. RHE (1.72 V) than RuO2 (1.75 V) at 10 mA cm−2 in an alkaline electrolyte. A rechargeable Zn-air battery based on the as-produced 3D porous catalyst demonstrates a high peak power density of 119 mW cm−2 at a cell voltage of 0.578 V while retaining an excellent stability over 250 charge-discharge cycles.

UR - http://www.scopus.com/inward/record.url?scp=85066972595&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85066972595&partnerID=8YFLogxK

U2 - 10.1016/j.scib.2019.05.020

DO - 10.1016/j.scib.2019.05.020

M3 - Article

AN - SCOPUS:85066972595

VL - 64

SP - 968

EP - 975

JO - Science Bulletin

JF - Science Bulletin

SN - 2095-9273

IS - 14

ER -