Journal
NANO ENERGY
Volume 39, Issue -, Pages 444-453Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.07.027
Keywords
FeMnP; MOCVD; Bifunctional electrocatalyst; Overall water splitting
Categories
Funding
- Rice University
- National Science Foundation [CHE-1411495, 1450681, 2015M582538, ACI-1053575]
- Robert A. Welch Foundation [C-0976, E-1728]
- 111 Project [B13042]
- NSF-CBET [1605331]
- NSF CAREER Award [1454384]
- NSF-MRI Award [1531814]
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- Direct For Computer & Info Scie & Enginr
- Office of Advanced Cyberinfrastructure (OAC) [1531814] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1411495] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1454384] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1605331] Funding Source: National Science Foundation
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Developing stable and efficient bifunctional catalysts for overall water splitting into hydrogen and oxygen is a critical step in the realization of several clean-energy technologies. Here we report a robust and highly active electrocatalyst that is constructed by deposition of the ternary metal phosphide FeMnP onto graphene-protected nickel foam by metal-organic chemical vapor deposition from a single source precursor. FeMnP exhibits high electrocatalytic activity toward both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Utilizing FeMnP/GNF as both the anode and the cathode for overall water splitting, a current density of 10 mA cm(-2) is achieved at a cell voltage of as low as 1.55 V with excellent stability. Complementary density functional theory (DFT) calculations suggest that facets exposing both Fe and Mn sites are necessary to achieve high HER activity. The present work provides a facile strategy for fabricating highly efficient electrocatalysts from earth-abundant materials for overall water splitting.
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