PtCoNi ternary intermetallic compounds anchored on Co, Ni and N co-doped mesoporous carbon: Synergetic effect between PtCoNi nanoparticles and doped mesoporous carbon promotes the catalytic activity

Li，Chaozhong1; Zhao，Weiyue1; Lu，Xueyi2; Chen，Zhangsen3; Han，Bing4; Zhang，Xiaorong1; Chen，Jiaxiang1; Shao，Yijia1; Huo，Junlang1; Zhu，Yuexiang1; Deng，Yonghong4; Sun，Shuhui3; Liao，Shijun1

2023-03-01

10.1016/j.jechem.2022.12.005

Journal of Energy Chemistry   Impact Factor & Quartile

2095-4956

Highly active and robust electrocatalysts are desired for proton exchange membrane fuel cells. Pt-based intermetallic compounds (IMCs) have been recognized as one of the most promising low-platinum catalysts for fuel cells (FCs). Herein, we report a high-performance IMCs by anchoring ordered PtCoNi ternary nanoparticles on the N, Co and Ni co-doped dodecahedral mesoporous carbon (DMC). While the introduced Co and Ni participate in the formation of PtCoNi IMCs, some of them are doped in the mesoporous carbon and coordinated by N to form Co-N/Ni-N dual active centers, which further enhances the electrocatalytic activity towards oxygen reduction reaction. Moreover, the addition of Ni results in a negative shift of the d-band center of Pt as compared to the Pt/DMC and PtCo/DMC, making it easier to adsorb oxygen on the surface. As expected, our optimal sample PtCoNi/DMC exhibits excellent performance with mass activity and specific activity of 1.32 A mg and 1.98 mA cm at 0.9 V, which are 7.33 and 6.19 times that of commercial Pt/C, respectively. The PtCoNi/DMC also reveals much better cathodic performance in an H-air single fuel cell than commercial Pt/C catalyst with a power density of 0.802 W cm. This work provides critical sights into constructing efficient catalysts by ternary intermetallic strategy and synergetic effect between active components and support.

Catalyst Fuel cell Oxygen reduction reaction Ternary intermetallic compounds

English

Others

2-s2.0-85146172555

Scopus

1.The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy Technology of Guangdong Universities,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,Guangdong,510641,China
2.School of Materials,Sun Yat-sen University,Shenzhen,Guangdong,518107,China
3.Centre Énergie,Matériaux et Télécommunications,Institute National de la Recherche Scientifique,Varennes,J3X 1P7,Canada
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Li，Chaozhong,Zhao，Weiyue,Lu，Xueyi,et al. PtCoNi ternary intermetallic compounds anchored on Co, Ni and N co-doped mesoporous carbon: Synergetic effect between PtCoNi nanoparticles and doped mesoporous carbon promotes the catalytic activity[J]. Journal of Energy Chemistry,2023,78:340-349.

Li，Chaozhong.,Zhao，Weiyue.,Lu，Xueyi.,Chen，Zhangsen.,Han，Bing.,...&Liao，Shijun.(2023).PtCoNi ternary intermetallic compounds anchored on Co, Ni and N co-doped mesoporous carbon: Synergetic effect between PtCoNi nanoparticles and doped mesoporous carbon promotes the catalytic activity.Journal of Energy Chemistry,78,340-349.

Li，Chaozhong,et al."PtCoNi ternary intermetallic compounds anchored on Co, Ni and N co-doped mesoporous carbon: Synergetic effect between PtCoNi nanoparticles and doped mesoporous carbon promotes the catalytic activity".Journal of Energy Chemistry 78(2023):340-349.