PtMo alloy and MoO(x)@Pt core-shell nanoparticles (NPs) were successfully synthesized by a chemical coreduction and sequential chemical reduction method, respectively. Both the carbon-supported alloy and core-shell NPs show substantially higher CO tolerance, compared to the commercialized E-TEK PtRu alloy and Pt catalyst. These novel nanocatalysts can be potentially used as highly CO-tolerant anode electrocatalysts in proton exchange membrane fuel cells.
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Adv Mater
February 2024
Institute for Advanced Interdisciplinary Research (iAIR), School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, P. R. China.
Maximizing atom-utilization efficiency and high current stability are crucial for the platinum (Pt)-based electrocatalysts for hydrogen evolution reaction (HER). Herein, the Pt single-atom anchored molybdenum (Mo) foil (Pt-SA/Mo-L) as a single-atom alloy electrode is synthesized by the laser ablation strategy. The local thermal effect with fast rising-cooling rate of laser can achieve the single-atom distribution of the precious metals (e.
View Article and Find Full Text PDFAdv Mater
July 2023
Key Laboratory of Theory and Technology of Advanced Batteries Materials, School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China.
Advancing electrocatalysts for alkaline hydrogen oxidation/evolution reaction (HOR/HER) is essential for anion exchange membrane-based devices. The state-of-the-art Pt-based electrocatalysts for alkaline HOR suffer from low intrinsic activities and severe CO poisoning due to the challenge of simultaneously optimizing surface adsorption toward different adsorbates. Herein, this challenge is overcome by tuning an atomic MoO layer with high oxophilicity onto PtMo nanoparticles (NPs) with optimized H , OH , and CO adsorption for boosting anti-CO-poisoning hydrogen-cycle electrocatalysis in alkaline media.
View Article and Find Full Text PDFFront Chem
April 2022
School of Mechanical Engineering, Dongguan University of Technology, Dongguan, China.
Direct ethanol fuel cells (DEFCs) have attracted more and more attention because of their unique advantages such as low cost and low toxicity. However, sluggish C-C bond cleavage during the ethanol electrooxidation reaction (EOR) in acidic media results in a lower energy yield and gravely hinders the commercialization of DEFCs. Therefore, it is very necessary to develop an anode catalyst with high performance, high stability and low cost to solve this problem.
View Article and Find Full Text PDFFront Chem
April 2021
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, China.
The high price of catalyst and poor durability still restrict the development of fuel cells. In this work, core-shell structured PtMo@TiO nanoparticles with low Pt content are prepared by a reverse microemulsion method. The morphologies, particle size, structure, and composition of PtMo@TiO nanoparticles are examined by several techniques such as X-ray Diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy, etc.
View Article and Find Full Text PDFRSC Adv
December 2020
College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, Tianjin University of Science and Technology China +86-13752339079.
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