TY - JOUR
T1 - Structurally ordered PtFe intermetallic nanocatalysts toward efficient electrocatalysis of methanol oxidation
AU - Nie, Yao
AU - Qi, Xueqiang
AU - Wu, Rui
AU - Yang, Ruolan
AU - Wang, Hong
AU - Deng, Min
AU - Zhang, Shuo
AU - Lu, Shun
AU - Gu, Zhengrong
AU - Liu, Xiaoteng
N1 - Funding information: This work was financially sponsored by the National Natural Science Foundation of China (Grant No. 21802013), the Top-notch youth Talent project of Chongqing Normal University (Grant No. 02030307-0075), the Foundation and Frontier Research Project of Chongqing of China (cstc2018jcyjAX0513), Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN201801125) and the UK Engineering Physics and Science Research Council (Grant No. EP/S032886/1).
PY - 2021/12/15
Y1 - 2021/12/15
N2 - Rationally regulating compositions and atomic arrangements is essential to tune the geometric and electronic structures of Pt alloy nanoparticles (NPs), thus largely optimizing their electrocatalytic performance towards methanol oxidation reaction (MOR). Herein, we present a facile alloying-ordering strategy to directly convert pure Pt NPs into size-controlled PtFe ordered intermetallic NPs by virtue of thermal interdiffusions under an easily-removable NaCl cover. And the disordered counterparts can be also obtained by simply varying the feeding contents of Fe precursors. Experimental results indicate that incorporating Fe considerably adjusts Pt electronic structure and further lowers the binding strength of CO intermediates on Pt sites. Moreover, the strain, ligand and synergistic effect between Pt and Fe are much stronger in ordered PtFe catalyst than in the disordered one, endowing the ordered PtFe with an obvious higher activity, stability and anti-CO poisoning for methanol oxidation as compared to disordered PtFe as well as commercial Pt/C.
AB - Rationally regulating compositions and atomic arrangements is essential to tune the geometric and electronic structures of Pt alloy nanoparticles (NPs), thus largely optimizing their electrocatalytic performance towards methanol oxidation reaction (MOR). Herein, we present a facile alloying-ordering strategy to directly convert pure Pt NPs into size-controlled PtFe ordered intermetallic NPs by virtue of thermal interdiffusions under an easily-removable NaCl cover. And the disordered counterparts can be also obtained by simply varying the feeding contents of Fe precursors. Experimental results indicate that incorporating Fe considerably adjusts Pt electronic structure and further lowers the binding strength of CO intermediates on Pt sites. Moreover, the strain, ligand and synergistic effect between Pt and Fe are much stronger in ordered PtFe catalyst than in the disordered one, endowing the ordered PtFe with an obvious higher activity, stability and anti-CO poisoning for methanol oxidation as compared to disordered PtFe as well as commercial Pt/C.
KW - CO-tolerance capacity
KW - Disordered PtFe
KW - Methanol oxidation reaction
KW - PtFe ordered intermetallic NPs
KW - Thermal interdiffusions
UR - http://www.scopus.com/inward/record.url?scp=85113545518&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2021.151004
DO - 10.1016/j.apsusc.2021.151004
M3 - Article
AN - SCOPUS:85113545518
SN - 0169-4332
VL - 569
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 151004
ER -