TY - JOUR
T1 - Hollow nanocubes composed of well-dispersed mixed metal-rich phosphides in N-doped carbon as highly efficient and durable electrocatalysts for the oxygen evolution reaction at high current densities
AU - Zhang, Lei
AU - Chang, Chun
AU - Hsu, Chan Wei
AU - Chang, Chih Wen
AU - Lu, Shih Yuan
N1 - Publisher Copyright:
© 2017 The Royal Society of Chemistry.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - The oxygen evolution reaction (OER) received a great deal of research attention in the past few years because of its prime role in electrocatalytic water splitting, rechargeable metal-air batteries, and fuel cells. To be competitively applicable at large scales, the electrocatalytic water-splitting system needs electrocatalysts that are cost effective, highly efficient, and highly durable. A novel metal-organic-framework (MOF)-derived and SiO 2 -protected phosphorization approach was developed to prepare hollow nanocubes composed of well-dispersed Ni 5 P 4 /Fe 3 P in N-doped carbon as cost-effective OER electrocatalysts, which are highly efficient and durable at high current density operations. Because of their unique structural and compositional features, the N-doped C/Ni 5 P 4 /Fe 3 P hollow nanocubes not only achieved excellent electrocatalytic efficiencies (η 10 = 252 mV and η 250 = 385 mV), but also outstanding electrocatalytic activities with an ultralow Tafel slope of 24.0 mV dec -1 , the lowest ever reported to the best of our knowledge. More importantly, the N-doped C/Ni 5 P 4 /Fe 3 P hollow nanocubes exhibited eminent long-term stability, both electrocatalytically and mechanically, even at a high current density of 250 mA cm -2 . These outstanding performances make the developed N-doped C/Ni 5 P 4 /Fe 3 P hollow nanocubes a promising candidate to replace commercial noble metal oxide-based OER electrocatalysts for large-scale applications.
AB - The oxygen evolution reaction (OER) received a great deal of research attention in the past few years because of its prime role in electrocatalytic water splitting, rechargeable metal-air batteries, and fuel cells. To be competitively applicable at large scales, the electrocatalytic water-splitting system needs electrocatalysts that are cost effective, highly efficient, and highly durable. A novel metal-organic-framework (MOF)-derived and SiO 2 -protected phosphorization approach was developed to prepare hollow nanocubes composed of well-dispersed Ni 5 P 4 /Fe 3 P in N-doped carbon as cost-effective OER electrocatalysts, which are highly efficient and durable at high current density operations. Because of their unique structural and compositional features, the N-doped C/Ni 5 P 4 /Fe 3 P hollow nanocubes not only achieved excellent electrocatalytic efficiencies (η 10 = 252 mV and η 250 = 385 mV), but also outstanding electrocatalytic activities with an ultralow Tafel slope of 24.0 mV dec -1 , the lowest ever reported to the best of our knowledge. More importantly, the N-doped C/Ni 5 P 4 /Fe 3 P hollow nanocubes exhibited eminent long-term stability, both electrocatalytically and mechanically, even at a high current density of 250 mA cm -2 . These outstanding performances make the developed N-doped C/Ni 5 P 4 /Fe 3 P hollow nanocubes a promising candidate to replace commercial noble metal oxide-based OER electrocatalysts for large-scale applications.
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U2 - 10.1039/c7ta04905f
DO - 10.1039/c7ta04905f
M3 - Article
AN - SCOPUS:85030100153
SN - 2050-7488
VL - 5
SP - 19656
EP - 19663
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 37
ER -