TiN diffusion barrier interlayer for enhancing the durability of Pt/Ti anodes for molten carbonate electrolysis

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-03-08 DOI:10.1016/j.corsci.2025.112845

Lei Guo , Kaifa Du , Mengyi Tang , Minghao Liu , Zhouyu Fang , Wenmiao Li , Di Chen , Huayi Yin , Dihua Wang

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Abstract

The corrosion behavior and durability of platinum-coated titanium (Pt/Ti) anodes in molten carbonate electrolysis were systematically studied across a temperature range of 450–650°C. The main cause of anode degradation was identified as rapid oxygen diffusion from the platinum coating to the titanium substrate, resulting in excessive passivation and the formation of a rutile TiO₂ layer. This passivation process led to coating breakage and spallation. To mitigate these issues, a TiN_x interlayer was introduced as an oxygen diffusion barrier to form a Pt/TiN_x/Ti electrode. The TiN_x layer significantly reduced substrate oxidation, thereby improving the anode’s corrosion resistance and extending its service life under harsh electrolysis conditions. These findings provide crucial insights into the corrosion mechanism of Pt/Ti anodes and offer a promising strategy to enhance their performance and longevity in industrial molten carbonate electrolysis applications for CO₂ reduction and green metallurgy.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.