Work

Highly Active Catalyst of Two-Dimensional CoS2/Graphene Nanocomposites for Hydrogen Evolution Reaction

Year: 2015

Type: article

Abstract: Hydrogen evolution reaction (HER) by electrochemical water splitting using new promising non-precious metal catalysts shows great potential for clean energy technology. The design and fabrication of a high-performance electrode material based on cobalt disulfide/reduced graphene oxide (CoS2/RGO) nanocomposites is reported by a one-step hydrothermal method. Benefiting from its structural advantages, namely, large amount of exposed surface, fast charge transfer, and synergistic effect between CoS2 and RGO, the as-prepared nanocomposites are exploited as a catalyst for the HER. The results indicate that CoS2/RGO-5 % exhibits the best performance of hydrogen evolution and the smallest overpotential of 159 mV to achieve a 15 mA cm(-2) current density, possessing the easiest releasing of hydrogen gas and the highest charge transfer rate, as well as remarkable stability.

Source: Nanoscale Research Letters

DOI: 10.1186/s11671-015-1198-3

Authors: Wei Xing, Yu Zhang, Qingzhong Xue, Zifeng Yan

Institutions: China University of Petroleum, East China, State Key Laboratory of Heavy Oil, China National Petroleum Corporation (China)

Language: English

Topic: Electrocatalysts for Energy Conversion

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,790