Design and Synthesis of Highly Active Al鈥揘i鈥揚 Foam Electrode for Hydrogen Evolution Reaction

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• 作者：Jos茅 Luis Lado ; Xiaoguang Wang ; Elvira Paz ; Enrique Carb贸-Argibay ; Noelia Guldris ; Carlos Rodr铆guez-Abreu ; Lifeng Liu ; Kirill Kovnir ; Yury V. Kolen鈥檏o
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：November 6, 2015
• 年：2015
• 卷：5
• 期：11
• 页码：6503-6508
• 全文大小：417K
• ISSN：2155-5435

文摘

An effective method to boost the electrocatalytic activity of nickel phosphides in H₂ evolution reaction is reported. The method took advantage of density functional theory calculations that allowed the design of a highly active material based on the combination of d-metal with p-metal within a phosphide structure. Furthermore, the principle is proven experimentally through successful synthesis of self-supported ternary Al鈥揘i鈥揚 foam electrocatalyst by alloying of Ni and Al followed by the gas transport phosphorization reaction. As a cathode for H₂ evolution reaction in acidic electrolyte, Al鈥揘i鈥揚 significantly outperforms pure Ni鈥揚, and it has an exchange current density of 0.6 mA/cm² and a Tafel slope of 65 mV/decade.