Ternary PtSmCo NPs electrocatalysts with enhanced oxygen reduction reaction

• 作者: Bing Li Gang Xie Leping Wang Lin Tian Ni Yang Qinghua Gong
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2020,（12）
• 所属期刊栏目: RARE EARTH CATALYSIS
• 页码范围: 1305-1311
• 页数: 7页
• 语种: 英文

摘要

PtSmCo ternary metal nanoparticles (NPs) were synthesized as electrocatalysts for oxygen reduction reaction (ORR). Firstly, SmCo NPs were prepared by potentiostatic electrodeposition in ionic liquids (ILs), and the average particle diameter of SmCo NPs corresponds to about 238 nm (-0.65 V), 72 nm (-0.75 V) and 45 nm (-0.85 V), respectively. Secondly, displacement and reductions of SmCo NPs occur in the K2PtCl4 and L-ascorbic acid sodium with about 3 nm of Pt NPs which grow on the surface of SmCo NPs to form PtSmCo ternary metal NPs. Studies of cycle voltammetry (CV) and line sweep voltammetry (LSV) indicate that the electrocatalytic property for ORR generates a decreasing order of commercial Pt/C > PtSmCo0.85 > PtSmCo0.75 > PtSmCo0.65. Accelerated durability testing (ADT) after 10000 cycles shows that PtSmCo0.85 NPs electrocatalyst decreases by ～40％ in electrochemical active surface areas (ECSA), the half-wave potential (E1/2) only negatively shifts by 14 mV and decreases by～13.6％ in mass activity (MA). When compared with JM Pt/C, where it decreases by ～49％ in ECSA, E1/2 is negatively shifted by 40 mV and decreased by～50％in MA. Therefore, PtSmCo0.85 NPs electrocatalyst is more stable than JM Pt/C.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Qinghua Gong		1	0	0.0	0.0
2	Leping Wang		1	0	0.0	0.0
3	Ni Yang		1	0	0.0	0.0
4	Lin Tian		1	0	0.0	0.0
5	Gang Xie		1	0	0.0	0.0
6	Bing Li		1	0	0.0	0.0