TY - JOUR
T1 - Seeded Synthesis of Unconventional 2H-Phase Pd Alloy Nanomaterials for Highly Efficient Oxygen Reduction
AU - Ge, Yiyao
AU - Wang, Xixi
AU - Huang, Biao
AU - Huang, Zhiqi
AU - Chen, Bo
AU - Ling, Chongyi
AU - Liu, Jiawei
AU - Liu, Guanghua
AU - Zhang, Jie
AU - Wang, Gang
AU - Chen, Ye
AU - Li, Lujiang
AU - Liao, Lingwen
AU - Wang, Lei
AU - Yun, Qinbai
AU - Lai, Zhuangchai
AU - Lu, Shiyao
AU - Luo, Qinxin
AU - Wang, Jinlan
AU - Zheng, Zijian
AU - Zhang, Hua
N1 - Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/10/20
Y1 - 2021/10/20
N2 - Crystal phase engineering of noble-metal-based alloy nanomaterials paves a new way to the rational synthesis of high-performance catalysts for various applications. However, the controlled preparation of noble-metal-based alloy nanomaterials with unconventional crystal phases still remains a great challenge due to their thermodynamically unstable nature. Herein, we develop a robust and general seeded method to synthesize PdCu alloy nanomaterials with unconventional hexagonal close-packed (hcp, 2H type) phase and also tunable Cu contents. Moreover, galvanic replacement of Cu by Pt can be further conducted to prepare unconventional trimetallic 2H-PdCuPt nanomaterials. Impressively, 2H-Pd67Cu33 nanoparticles possess a high mass activity of 0.87 A mg-1Pd at 0.9 V (vs reversible hydrogen electrode (RHE)) in electrochemical oxygen reduction reaction (ORR) under alkaline condition, which is 2.5 times that of the conventional face-centered cubic (fcc) Pd69Cu31 counterpart, revealing the important role of crystal phase on determining the ORR performance. After the incorporation of Pt, the obtained 2H-Pd71Cu22Pt7 catalyst shows a significantly enhanced mass activity of 1.92 A mg-1Pd+Pt at 0.9 V (vs RHE), which is 19.2 and 8.7 times those of commercial Pt/C and Pd/C, placing it among the best reported Pd-based ORR electrocatalysts under alkaline conditions.
AB - Crystal phase engineering of noble-metal-based alloy nanomaterials paves a new way to the rational synthesis of high-performance catalysts for various applications. However, the controlled preparation of noble-metal-based alloy nanomaterials with unconventional crystal phases still remains a great challenge due to their thermodynamically unstable nature. Herein, we develop a robust and general seeded method to synthesize PdCu alloy nanomaterials with unconventional hexagonal close-packed (hcp, 2H type) phase and also tunable Cu contents. Moreover, galvanic replacement of Cu by Pt can be further conducted to prepare unconventional trimetallic 2H-PdCuPt nanomaterials. Impressively, 2H-Pd67Cu33 nanoparticles possess a high mass activity of 0.87 A mg-1Pd at 0.9 V (vs reversible hydrogen electrode (RHE)) in electrochemical oxygen reduction reaction (ORR) under alkaline condition, which is 2.5 times that of the conventional face-centered cubic (fcc) Pd69Cu31 counterpart, revealing the important role of crystal phase on determining the ORR performance. After the incorporation of Pt, the obtained 2H-Pd71Cu22Pt7 catalyst shows a significantly enhanced mass activity of 1.92 A mg-1Pd+Pt at 0.9 V (vs RHE), which is 19.2 and 8.7 times those of commercial Pt/C and Pd/C, placing it among the best reported Pd-based ORR electrocatalysts under alkaline conditions.
UR - https://www.scopus.com/pages/publications/85117480094
U2 - 10.1021/jacs.1c08973
DO - 10.1021/jacs.1c08973
M3 - Article
C2 - 34613737
AN - SCOPUS:85117480094
SN - 0002-7863
VL - 143
SP - 17292
EP - 17299
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 41
ER -