TY - JOUR
T1 - Regulation of oxygen reduction reaction by the magnetic effect of L10-PtFe alloy
AU - Lu, Fei
AU - Wang, Jian
AU - Li, Junmeng
AU - Du, Yuting
AU - Kong, Xiang Peng
AU - Liu, Shoujie
AU - Yi, Ding
AU - Takahashi, Yukiko K.
AU - Hono, Kazuhiro
AU - Wang, Xi
AU - Yao, Jiannian
N1 - Funding Information:
We thank the beamline 1W1B at Beijing Synchrotron Radiation Facility (BSRF) and beamline BL14W1 at Shanghai Synchrotron Radiation Facility (SSRF). The authors also appreciate the support from the “Excellent One Hundred” project of Beijing Jiaotong University. This work was supported financially by “the Fundamental Research Funds for the Central Universities” (Grant Nos. 2018JBZ107 and 21905019). This work was also supported financially by the National Natural Science Foundation of China (Grant Nos. 91961125 and 21905019), “Key Program for International S&T Cooperation Projects of China” from the Ministry of Science and Technology of China (Grant No. 2018YFE0124600), and the Chemistry and Chemical Engineering Guangdong Laboratory (Grant Nos. 1932001 and 1932004). This work was also supported in part by the KAKENHI Grant-in-Aid (A) (Grant No. 18H03787). J. W. acknowledges NIMS for the provision of the ICYS fellowship.
Funding Information:
We thank the beamline 1W1B at Beijing Synchrotron Radiation Facility (BSRF) and beamline BL14W1 at Shanghai Synchrotron Radiation Facility (SSRF). The authors also appreciate the support from the “Excellent One Hundred” project of Beijing Jiaotong University. This work was supported financially by “the Fundamental Research Funds for the Central Universities ” (Grant Nos. 2018JBZ107 and 21905019 ). This work was also supported financially by the National Natural Science Foundation of China (Grant Nos. 91961125 and 21905019 ), “Key Program for International S&T Cooperation Projects of China” from the Ministry of Science and Technology of China (Grant No. 2018YFE0124600 ), and the Chemistry and Chemical Engineering Guangdong Laboratory (Grant Nos. 1932001 and 1932004 ). This work was also supported in part by the KAKENHI Grant-in-Aid (A) (Grant No. 18H03787 ). J. W. acknowledges NIMS for the provision of the ICYS fellowship.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/12/5
Y1 - 2020/12/5
N2 - It is important to improve the oxygen reduction reaction (ORR) performance of Pt by alloying it with first-row transition metals (M: e.g., Fe, Co, Ni). It is known that the ligand, strain, and ensemble effects govern the ORR performance. However, the intrinsic magnetic characteristics of PtMs have rarely been focused on in ORR investigations. Here, we employed a hard-magnet L10-ordered PtFe nanopillar film (L10-PtFe NF) as model catalyst to uncover the catalyst's magnetic effect on the ORR. We report a five-fold enhancement of the catalytic efficiency of magnetized L10-PtFe(M) NF compared with unmagnetized one. Further investigations demonstrate that the coverage of chemisorbed oxygen on catalyst surface, especially the primary Pt dyz–O2 π* coupling, manipulated by the catalyst's magnetic field is the key factor for the ORR regulation. This work thus paves the way for the implementation of magnetic effect towards the precise regulation in broad catalysis applications.
AB - It is important to improve the oxygen reduction reaction (ORR) performance of Pt by alloying it with first-row transition metals (M: e.g., Fe, Co, Ni). It is known that the ligand, strain, and ensemble effects govern the ORR performance. However, the intrinsic magnetic characteristics of PtMs have rarely been focused on in ORR investigations. Here, we employed a hard-magnet L10-ordered PtFe nanopillar film (L10-PtFe NF) as model catalyst to uncover the catalyst's magnetic effect on the ORR. We report a five-fold enhancement of the catalytic efficiency of magnetized L10-PtFe(M) NF compared with unmagnetized one. Further investigations demonstrate that the coverage of chemisorbed oxygen on catalyst surface, especially the primary Pt dyz–O2 π* coupling, manipulated by the catalyst's magnetic field is the key factor for the ORR regulation. This work thus paves the way for the implementation of magnetic effect towards the precise regulation in broad catalysis applications.
KW - L1-PtFe alloy
KW - Magnetic effect
KW - Model catalyst
KW - Orbital coupling
KW - Oxygen reduction reaction
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U2 - 10.1016/j.apcatb.2020.119332
DO - 10.1016/j.apcatb.2020.119332
M3 - Article
AN - SCOPUS:85087924533
SN - 0926-3373
VL - 278
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 119332
ER -