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NANOTECHNOLOGY · 2021 ·Vol. 32 ·期 35 ·355402 · IF 3.874

Porous PdAg alloy nanostructures with a concave surface for efficient electrocatalytic methanol oxidation

Hongjing Wang,Tongqing Zhou,Qiqi Mao,Shengqi Wang,Ziqiang Wang,You Xu,Xiaonian Li,Kai Deng,Liang Wang

Tuning the composition and surface structure of the metal nanocrystals offered viable avenues for enhancing catalytic performances. Herein, we report a facile one-pot strategy for the formation of PdAg porous alloy nanostructures (PANs) with a concave surface. Due to their highly open nanostructures and tunable d-band center features, PdAg PANs exhibit superior electrocatalytic activity and long-term durability than Pd nanoparticles (NPs) and Pd/C for methanol oxidation reaction (MOR) in alkaline media. Our results provide a feasible and efficient approach for the controlled synthesis of high-performance Pd-based nanomaterials for alkaline MOR.

研究领域: 材料科学 · 化学

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CRYSTENGCOMM · 2025 · IF 2.6

A Comparative Study of Edge-Selective and Face-Specific Growth of PdAg Alloys on Au Nanoplates and Their Applications for Ethanol Oxidation Reaction

Yanpei An,Yingying Wang,Yuanyuan Min,Xiaoyi Guo,Yanyun Ma,Xian-Sen Tao,Xian-Hong Li,Yiqun Zheng

We present the synthesis of two-dimensional Au-PdAg hybrid electrocatalysts with two distinct morphologies through site-specific deposition in seeded growth. The co-reduction of Pd and Ag precursors in the presence of plate-like Au seeds, using CTAC and CTAB as capping agents, led to edge- and face-specific deposition. This approach successfully and selectively engineered the interface between Au and PdAg phases along the edge region and upper/bottom faces, respectively. Our results demonstrate that the Au-PdAg products exhibit superior electrocatalytic activity and long-term durability for ethanol oxidation in alkaline media compared to commercial Pt/C electrocatalysts. DFT simulations further validated the advantages of constructing Au-PdAg interfaces over alloyed counterparts in EOR electrocatalysis. The current study offers a viable strategy for constructing two-dimensional trimetallic EOR electrocatalysts with well-defined interfaces, potentially paving the way for the rational design of high-performance fuel cell catalysts.

CAS / MDL: 50-81-7 16961-25-4 112-02-7 57-09-0 13820-53-6

研究领域: 材料科学 · 电化学

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Porous PdAg alloy nanostructures with a concave surface for efficient electrocatalytic methanol oxidation

A Comparative Study of Edge-Selective and Face-Specific Growth of PdAg Alloys on Au Nanoplates and Their Applications for Ethanol Oxidation Reaction