Please use this identifier to cite or link to this item:
Title: An electron deficiency strategy for enhancing hydrogen evolution on CoP nano-electrocatalysts
Authors: Liao, Hanbin
Sun, Yuanmiao
Dai, Chencheng
Du, Yonghua
Xi, Shibo
Liu, Fei
Yu, Linghui
Yang, Ziyu
Hou, Yanglong
Fisher, Adrian C.
Li, Shuzhou
Xu, Jason Zhichuan
Keywords: Engineering::Materials
Issue Date: 2018
Source: Liao, H., Sun, Y., Dai, C., Du, Y., Xi, S., Liu, F., . . . Xu, J. Z. (2018). An electron deficiency strategy for enhancing hydrogen evolution on CoP nano-electrocatalysts. Nano Energy, 50, 273-280. doi:10.1016/j.nanoen.2018.05.060
Journal: Nano Energy
Abstract: Optimizing the hydrogen adsorption on electrodes is one of the most effective strategies to promote the hydrogen evolution reaction (HER). In recent years, cobalt phosphides (CoP) have been identified as a promising catalyst for HER in acid. However, the hydrogen adsorption on CoP is strong and a considerable overpotential has to be applied to enable HER. Here, we report a strategy to weaken the hydrogen adsorption on CoP through an electron deficiency in CoP induced by Au@CoP core/shell structure. A weakened hydrogen adsorption is confirmed by the density functional theory (DFT) calculation. Au@CoP gave an overpotential (η) of 160 mV at the current density of 1 mA cm−2CoP, which is about 50 mV less than pure CoP. It also exhibited a turn-over frequency (TOF) value of 0.68 s−1 per active site at η = 150 mV, which is more than 4 times higher than CoP. The strategy reported here holds potential to be extended to other electrodes for optimizing their hydrogen adsorption for HER.
ISSN: 2211-2855
DOI: 10.1016/j.nanoen.2018.05.060
Rights: © 2018 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

Citations 10

Updated on Mar 10, 2021

Citations 10

Updated on Mar 5, 2021

Page view(s)

Updated on May 16, 2021

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.