Effect of Heat Treatment on the Structure and Functional Characteristics of the PtCo/C Catalyst

IF 1.1 4区 工程技术 Q4 ELECTROCHEMISTRY
A. K. Nevelskaya, S. V. Belenov, N. V. Toporkov, A. Yu. Nikulin
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引用次数: 0

Abstract

The PtCo/C electrocatalyst, prepared by simultaneous reduction of metal precursors using sodium borohydride, was treated at 350°C in an argon atmosphere for 1 h. The results of XRD analysis and transmission electron microscopy indicate that the average crystallite size increased and nanoparticle agglomerates formed after heat treatment. The shift of the Pt(111) reflection after treatment suggests possible segregation of metal components during the heating of the sample. The catalyst activity (both mass and specific surface activity) increased after heat treatment. According to the results of the stress test at potentials of 0.6–1.4 V, the residual activity of the sample after heat treatment was higher than in the “as received” state.

Abstract Image

热处理对 PtCo/C 催化剂结构和功能特性的影响
摘要 利用硼氢化钠同时还原金属前驱体制备的 PtCo/C 电催化剂,在 350°C 的氩气环境中处理 1 小时。XRD 分析和透射电子显微镜结果表明,热处理后平均晶粒尺寸增大,并形成纳米颗粒团聚。处理后 Pt(111)反射的移动表明在样品加热过程中金属成分可能发生了偏析。热处理后催化剂的活性(质量和比表面活性)都有所提高。根据电位为 0.6-1.4 V 的应力测试结果,热处理后样品的残余活性高于 "原样 "状态。
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来源期刊
Russian Journal of Electrochemistry
Russian Journal of Electrochemistry 工程技术-电化学
CiteScore
1.90
自引率
8.30%
发文量
102
审稿时长
6 months
期刊介绍: Russian Journal of Electrochemistry is a journal that covers all aspects of research in modern electrochemistry. The journal welcomes submissions in English or Russian regardless of country and nationality of authors.
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