Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/83059
Title: Synthesis of Cobalt Phosphide Nanoparticles Supported on Pristine Graphene by Dynamically Self-Assembled Graphene Quantum Dots for Hydrogen Evolution
Authors: Wang, Xiaoyan
Yuan, Weiyong
Yu, Yanan
Li, Chang Ming
Keywords: Cobalt phosphide
Dynamic self-assembly
Issue Date: 2017
Source: Wang, X., Yuan, W., Yu, Y., & Li, C. M. (2017). Synthesis of Cobalt Phosphide Nanoparticles Supported on Pristine Graphene by Dynamically Self-Assembled Graphene Quantum Dots for Hydrogen Evolution. ChemSusChem, 10(5), 1014-1021.
Series/Report no.: ChemSusChem
Abstract: A highly active, durable, and low-cost hydrogen evolution reaction (HER) catalyst is desirable for energy storage through water splitting but its fabrication presents great challenges. Herein, mediated by dynamically self-assembled graphene quantum dots (GQDs), small, uniform, high-density, and well-dispersed CoP nanoparticles were grown in situ on pristine graphene for the first time. This hybrid nanostructure was then employed as HER electrocatalyst, showing an onset potential of 7 mV, an overpotential of 91.3 mV to achieve 10 mA cm−2, a Tafel slope of 42.6 mV dec−1, and an exchange current density of 0.1225 mA cm−2, all of which compare favorably to those of most reported non-noble-metal catalysts. The developed catalyst also exhibits excellent durability with negligible current loss after 2000 cyclic voltammetry cycles (+0.01 to −0.17 V vs. RHE) or 34 h of chronoamperometric measurement at an overpotential of 91.3 mV. This work not only develops a new strategy for the fabrication of high-performance and inexpensive electrocatalysts for HER but also provides scientific insight into the mechanism of the dynamically self-assembled GQDsmediated synthesis process.
URI: https://hdl.handle.net/10356/83059
http://hdl.handle.net/10220/42394
ISSN: 1864-5631
DOI: 10.1002/cssc.201601761
Rights: © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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