{"title":"Ruthenate perovskite with face-sharing motifs for alkaline hydrogen evolution","authors":"Chuanhui Zhu, Hao Tian, Pengfei Tan, Bin Huang, Shuang Zhao, Guohong Cai, Chongyang Yuan, Mei-Huan Zhao, Meng Cao, Jianfa Zhao, Luchuan Shi, Fang Qi, Haili Song, Keke Huang, Shouhua Feng, Mark Croft, Changqing Jin, Shuk-Yin Tong, Man-Rong Li","doi":"10.1016/j.checat.2024.101132","DOIUrl":null,"url":null,"abstract":"One of the challenges in designing efficient electrocatalysts is rationalizing the impact of crystal and electronic structures on catalytic activity. Here, we synthesized four BaRuO<sub>3</sub> polymorphs with different structures and investigated the <em>d-d</em> interaction stemming from face-sharing RuO<sub>6</sub>. The polymorph 9<em>R</em>-BaRuO<sub>3</sub> has the highest percentage of face-sharing RuO<sub>6</sub> octahedra and, therefore, the strongest <em>d-d</em> interaction; it shows the best activity and stability in catalyzing alkaline hydrogen evolution reactions (HER). Specifically, 9<em>R</em>-BaRuO<sub>3</sub> displays a small Tafel slope of 30 mV dec<sup>−1</sup> and a low overpotential of <em>η</em><sub>10</sub> < 51 mV. This performance is attributed to its high intrinsic activity delivered by the <em>d-d</em> interaction and is intimately related to the crystal structure. The micron-sized 9<em>R</em>-BaRuO<sub>3</sub> powders are stable under industrial plasma spraying and carry a current density of 0.4 A/cm<sup>2</sup> @ 1.74 V in commercial alkaline water electrolyzers. The results on catalytic activities and crystal structure provide insight for designing better electrocatalysts for practical applications.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"226 1-2 1","pages":""},"PeriodicalIF":11.5000,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chem Catalysis","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.checat.2024.101132","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
One of the challenges in designing efficient electrocatalysts is rationalizing the impact of crystal and electronic structures on catalytic activity. Here, we synthesized four BaRuO3 polymorphs with different structures and investigated the d-d interaction stemming from face-sharing RuO6. The polymorph 9R-BaRuO3 has the highest percentage of face-sharing RuO6 octahedra and, therefore, the strongest d-d interaction; it shows the best activity and stability in catalyzing alkaline hydrogen evolution reactions (HER). Specifically, 9R-BaRuO3 displays a small Tafel slope of 30 mV dec−1 and a low overpotential of η10 < 51 mV. This performance is attributed to its high intrinsic activity delivered by the d-d interaction and is intimately related to the crystal structure. The micron-sized 9R-BaRuO3 powders are stable under industrial plasma spraying and carry a current density of 0.4 A/cm2 @ 1.74 V in commercial alkaline water electrolyzers. The results on catalytic activities and crystal structure provide insight for designing better electrocatalysts for practical applications.
期刊介绍:
Chem Catalysis is a monthly journal that publishes innovative research on fundamental and applied catalysis, providing a platform for researchers across chemistry, chemical engineering, and related fields. It serves as a premier resource for scientists and engineers in academia and industry, covering heterogeneous, homogeneous, and biocatalysis. Emphasizing transformative methods and technologies, the journal aims to advance understanding, introduce novel catalysts, and connect fundamental insights to real-world applications for societal benefit.