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Title: Boosting hydrogen evolution reaction via electronic coupling of cerium phosphate with molybdenum phosphide nanobelts
Authors: Zhang, Luyao
Hu, Minghao
Li, Huan
Cao, Bo
Jing, Peng
Liu, Baocang
Gao, Rui
Zhang, Jun
Liu, Bin
Keywords: Science::Chemistry
Issue Date: 2021
Source: Zhang, L., Hu, M., Li, H., Cao, B., Jing, P., Liu, B., Gao, R., Zhang, J. & Liu, B. (2021). Boosting hydrogen evolution reaction via electronic coupling of cerium phosphate with molybdenum phosphide nanobelts. Small, 17(40), 2102413-.
Project: RG4/20
Journal: Small 
Abstract: Molybdenum phosphide (MoP) is regarded as one of the most promising alternatives to noble-metal based electrocatalysts for efficient hydrogen evolution reaction (HER) due to its similar d-band electronic structure to noble metals and tunable features associated with phase and composition. However, it still remains a great challenge to construct MoP electrocatalysts with abundant active sites that possess ideal H binding strength to promote catalytic performance. In this work, it is found that by anchoring a rare earth compound, cerium phosphate (CePO4 ) on MoP (CePO4 /MoP), the stabilized Ce3+ in CePO4 can significantly boost the formation of oxygen vacancies in ceria (CeO2 ) in situ formed on CePO4 surface during HER, which effectively regulates the d-band electronic density-of-states of MoP, increases the numbers of active sites, and promotes the vectorial electron transfer, therefore greatly enhancing the HER performance of MoP. The optimized CePO4 /MoP/carbon cloth (CC) electrocatalyst exhibits a significantly improved HER performance with an overpotential of 48 mV at 10 mA cm-2 and a Tafel slope of 38 mV dec-1 , about two times better than the HER performance of MoP catalyst without CePO4 (with an overpotential >80 mV dec-1 at 10 mA cm-2 ), very close to commercial Pt/C catalyst.
ISSN: 1613-6810
DOI: 10.1002/smll.202102413
Schools: School of Chemical and Biomedical Engineering 
School of Physical and Mathematical Sciences 
Rights: © 2021 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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