화학공학소재연구정보센터
Electrochimica Acta, Vol.283, 1490-1497, 2018
Fabrication of Fe-doped Co2P nanoparticles as efficient electrocatalyst for electrochemical and photoelectrochemical water oxidation
Fe-doped Co2P nanoparticles (Fe-Co2P) are successfully synthesized using a facile and scalable solid reaction method and demonstrate highly efficient oxygen evolution reaction (OER) activity towards water splitting. Benefiting from the synergistic effect of Fe, Co and P as well as enlarged electrochemical active surface area (ECSA), the resultant Fe-Co2P nanoparticles yield extraordinary OER performance with an overpotential as low as 289 mV at 10 mA cm(-2), a small Tafel slope of 40 mV dec(-1), and excellent OER stability, which are superior to the individual Co2P, Fe2P as well as the commercial RUO2 electrocatalyst. Moreover, Fe-Co2P nanoparticles are also shown to be a resultful co-catalyst to promote the photoelectrochemical (PEC) water oxidation performance of alpha-Fe2O3 photoanode, leading to a cathodic potential shift of similar to 200 mVat 1.0 mA cm(-2) and a significantly promoted photocurrent density of 1.40 mA cm(-2) at 1.23 V-RHE with respect to that of bare alpha-Fe2O3. The effective synthesis method and electronic modulate-induced enhancement of OER by hetero-atom doping highlight the promising design and fabricate of various efficient bimetallic or polymetallic phosphides for photo-/electrochemical water splitting. (C) 2018 Elsevier Ltd. All rights reserved.