双金属片
氧还原
合金
材料科学
形态学(生物学)
电催化剂
氧还原反应
酒精氧化
酒
纳米技术
化学工程
冶金
化学
电化学
电极
有机化学
工程类
物理化学
生物
金属
遗传学
作者
Meida Chen,Longhui Luo,Cinan Wu,Bin Wang,Shangyan Zhou,Qingmei Wang
标识
DOI:10.1016/j.apsusc.2024.159833
摘要
The exploration of high properties of electrocatalysts is imperative for the commercialization application of fuel cells. Enhancing the catalytic activity and stability of Pt-based catalysts can be achieved by rationally designing their morphology and composition. Here, we synthesized self-assembled PtCo alloy nanofoams (ANs) catalysts with controllable surface composition and porous network. The experimental results show that prepared PtxCo1-ANs catalysts display excellent electrochemical performance in oxygen reduction reaction (ORR), methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). Interestingly, the mass activities of Pt2Co1-ANs with optimized surface composition for ORR, MOR, and EOR are 6.41, 6.64, and 7.71-fold higher than commercial Pt/C catalysts, respectively. Meantime, it also maintains high electrocatalytic durability in ORR, MOR, and EOR. Such results ascribe to the modified surface composition, optimized electronic structure, and porous interconnected nanofoam structure. These findings provide valuable insights into the design of highly active and durable multifunctional electrocatalysts with controllable shapes and composition.
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