TY - JOUR
T1 - Interface oxygen vacancy enhanced alkaline hydrogen evolution activity of cobalt-iron phosphide/CeO2 hollow nanorods
AU - Luo, Qiaomei
AU - Zhao, Yiwei
AU - Sun, Lan
AU - Wang, Chen
AU - Xin, Hongqiang
AU - Song, Jiaxin
AU - Li, Danyang
AU - Ma, Fei
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - Electrocatalytic hydrogen evolution reaction (HER) is a promising way to develop the green hydrogen economy. Transition metal phosphides (TMPs) based hybrids are potential catalyst candidates for HER. Herein, hollow hexagonal rods (HHRs) of Co-Fe-P/CeO2 heterojunctions are fabricated using the metal–organic frameworks (MOFs) as the templates. The hollow frame provides abundant active sites and sufficient mass transfer, the interfacial synergistic effects and the oxygen vacancies at the interface could modulate the electronic structure, improve the water dissociation, and optimize the hydrogen adsorption free energy (ΔGH*). As a result, the Co-Fe-P/CeO2 HHRs nanohybrids exhibit excellent HER performances, for which a current density of 10 mA cm−2 can be obtained at an overpotential of only 69.7 mV in alkaline medium, together with good long-term durability. The results supply the novel platform and useful guidelines for design and construction of non-noble metal based composite electrocatalysts towards HER.
AB - Electrocatalytic hydrogen evolution reaction (HER) is a promising way to develop the green hydrogen economy. Transition metal phosphides (TMPs) based hybrids are potential catalyst candidates for HER. Herein, hollow hexagonal rods (HHRs) of Co-Fe-P/CeO2 heterojunctions are fabricated using the metal–organic frameworks (MOFs) as the templates. The hollow frame provides abundant active sites and sufficient mass transfer, the interfacial synergistic effects and the oxygen vacancies at the interface could modulate the electronic structure, improve the water dissociation, and optimize the hydrogen adsorption free energy (ΔGH*). As a result, the Co-Fe-P/CeO2 HHRs nanohybrids exhibit excellent HER performances, for which a current density of 10 mA cm−2 can be obtained at an overpotential of only 69.7 mV in alkaline medium, together with good long-term durability. The results supply the novel platform and useful guidelines for design and construction of non-noble metal based composite electrocatalysts towards HER.
KW - Heterojunctions
KW - Hollow hexagonal rods
KW - Optimized electronic structure
KW - Oxygen vacancy
KW - Superior HER activity
UR - https://www.scopus.com/pages/publications/85125131355
U2 - 10.1016/j.cej.2022.135376
DO - 10.1016/j.cej.2022.135376
M3 - 文章
AN - SCOPUS:85125131355
SN - 1385-8947
VL - 437
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 135376
ER -