Iron phosphide encapsulated in P-doped graphitic carbon as efficient and stable electrocatalyst for hydrogen and oxygen evolution reactions

Yao, Y, Mahmood, N, Pan, L, Shen, G, Zhang, R, Guo, R, Aleem, F, Yuan, X, Zhang, X and Zou, J 2018, 'Iron phosphide encapsulated in P-doped graphitic carbon as efficient and stable electrocatalyst for hydrogen and oxygen evolution reactions', Nanoscale, vol. 10, no. 45, pp. 21327-21334.


Document type: Journal Article
Collection: Journal Articles

Title Iron phosphide encapsulated in P-doped graphitic carbon as efficient and stable electrocatalyst for hydrogen and oxygen evolution reactions
Author(s) Yao, Y
Mahmood, N
Pan, L
Shen, G
Zhang, R
Guo, R
Aleem, F
Yuan, X
Zhang, X
Zou, J
Year 2018
Journal name Nanoscale
Volume number 10
Issue number 45
Start page 21327
End page 21334
Total pages 8
Publisher Royal Society of Chemistry
Abstract The development of durable and efficient non-noble electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is highly desirable but challenging for the commercialization of renewable energy systems. Herein, a facile strategy is developed for the synthesis of iron phosphide (FeP) nanoparticles protected with an overcoat of "multifunctional" P-doped graphitic carbon as a cost-effective electrocatalyst. The key point is the utilization of MOF-derived iron nanoparticles embedded in graphitic carbon (Fe@GC), which are synthesized via the pyrolysis of the Fe-MIL-88 template and subsequent phosphorization of Fe and simultaneous doping of P in carbon. Compared to the direct phosphorization of Fe-MIL-88, resulting in Fe2P on amorphous carbon (Fe2P@APC), this strategy gives easier access to phosphorization and P doping through pyrolysis temperature regulation. Higherature pyrolysis can also yield the graphitic carbon encapsulated nanoparticle structure (FeP@GPC), which increases conductivity and prevents agglomeration as well as dissolution under harsh operating conditions, and thus contributes to enhanced activity and long-time stability. The optimized FeP@GPC exhibits superior activity compared to Fe2P/FeP@GPC and Fe2P@APC, which is attributed to the modified electronic structure of FeP due to its greater P proportion than Fe2P together with the strong synergy between the nanoparticles and graphitic carbon. In detail, FeP@GPC exhibits an ultralow overpotential of 72 mV and 278 mV to achieve the current density of 10 mA cm-2 for the HER in acid and OER in alkaline media, respectively, together with negligible degradation after 20 h, which ranks among the best Fe-based electrocatalysts.
Subject Functional Materials
Catalytic Process Engineering
Nanomaterials
DOI - identifier 10.1039/c8nr06752j
Copyright notice © 2018 The Royal Society of Chemistry
ISSN 2040-3364
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Altmetric details:
Access Statistics: 7 Abstract Views  -  Detailed Statistics
Created: Mon, 29 Apr 2019, 13:04:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us