•  
  •  
 
Nano Research

Article Title

Bifunctional catalysts of Co3O4@GCN tubular nanostructured (TNS) hybrids for oxygen and hydrogen evolution reactions

Authors

Muhammad Tahir, Research Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, China Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
Nasir Mahmood, Department of Materials Science and Engineering, Peking University, Beijing 100081, China
Xiaoxue Zhang, Beijing Key Laboratory for Chemical Power Source and Green Catalyst, School of Chemical Engineering and Environment, Beijing Institution of Technology, Beijing 100081, China
Tariq Mahmood, Research Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, China
Faheem. K. Butt, Research Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, China
Imran Aslam, Research Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, China
M. Tanveer, Research Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, China
Faryal Idrees, Research Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, China
Syed Khalid, Research Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, China
Imran Shakir, Sustainable Energy Technologies (SET) center building No 3, Room 1c23, College of Engineering, King Saud University, PO BOX 800, Riyadh 11421, Kingdom of Saudi Arabia
Yiming Yan, Beijing Key Laboratory for Chemical Power Source and Green Catalyst, School of Chemical Engineering and Environment, Beijing Institution of Technology, Beijing 100081, China
Jijun Zou, Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
Chuanbao Cao, Research Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, China
andYanglong Hou, Department of Materials Science and Engineering, Peking University, Beijing 100081, China

Keywords

carbon nitride, cobalt oxide, bifunctional catalyst, oxygen evolution reaction, hydrogen evolution reaction

Abstract

Catalysts for oxygen and hydrogen evolution reactions (OER/HER) are at the heart of renewable green energy sources such as water splitting. Although incredible efforts have been made to develop efficient catalysts for OER and HER, great challenges still remain in the development of bifunctional catalysts. Here, we report a novel hybrid of Co3O4 embedded in tubular nanostructures of graphitic carbon nitride (GCN) and synthesized through a facile, large-scale chemical method at low temperature. Strong synergistic effects between Co3O4 and GCN resulted in excellent performance as a bifunctional catalyst for OER and HER. The high surface area, unique tubular nanostructure, and composition of the hybrid made all redox sites easily available for catalysis and provided faster ionic and electronic conduction. The Co3O4@GCN tubular nanostructured (TNS) hybrid exhibited the lowest overpotential (0.12 V) and excellent current density (147 mA/cm2) in OER, better than benchmarks IrO2 and RuO2, and with superior durability in alkaline media. Furthermore, the Co3O4@GCN TNS hybrid demonstrated excellent performance in HER, with a much lower onset and overpotential, and a stable current density. It is expected that the Co3O4@GCN TNS hybrid developed in this study will be an attractive alternative to noble metals catalysts in large scale water splitting and fuel cells.

Graphical Abstract

Publisher

Tsinghua University Press

Share

COinS