{"title":"Boosting the Oxygen Evolution Reaction via the Reconstruction of M(OH)x/Fe3O4 Catalyst","authors":"Xiaoqu Wang, Limin Wang, Yongchun Liu, Raj Kumar, Li Liu, Qiulan Huang, Dujuan Huang, You-Jun Fan, Du-Hong Chen, Wei Chen","doi":"10.1039/d4qi01574f","DOIUrl":null,"url":null,"abstract":"For large-scale hydrogen production from electrocatalysis of water, the Ni- and/or Fe-based catalysts were commonly used but limited by the ultrahigh overpotential and poor stability at high current density (>500 mA cm−2). Here, the reconstruction of M(OH)x/Fe3O4 (M = Ni, Fe) arrays has been fabricated for boosting the oxygen evolution reaction (OER). The prepared M(OH)x/Fe3O4 grewon iron foam (M(OH)x/Fe3O4/IF) catalysts exhibited low overpotentials of 214 and 311 mV for OER at the current densities of 50 and 500 mA cm−2, respectively, besides the excellent stability up to 70 h of operation at a current density of 10 mA cm−2 in 1 M KOH. The in situ Raman spectra revealed that, the reconstruction of M(OH)x/Fe3O4/IF boosted the OER activity. Theoretical calculation revealed favorable absorption of O2 at Ni site of M(OH)x/Fe3O4/IF during OER. This work highlights the reconstruction structurally definite catalysts for promoting the catalytic activity toward OER and the large-scale electrocatalysis of water.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":6.1000,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry Frontiers","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d4qi01574f","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
For large-scale hydrogen production from electrocatalysis of water, the Ni- and/or Fe-based catalysts were commonly used but limited by the ultrahigh overpotential and poor stability at high current density (>500 mA cm−2). Here, the reconstruction of M(OH)x/Fe3O4 (M = Ni, Fe) arrays has been fabricated for boosting the oxygen evolution reaction (OER). The prepared M(OH)x/Fe3O4 grewon iron foam (M(OH)x/Fe3O4/IF) catalysts exhibited low overpotentials of 214 and 311 mV for OER at the current densities of 50 and 500 mA cm−2, respectively, besides the excellent stability up to 70 h of operation at a current density of 10 mA cm−2 in 1 M KOH. The in situ Raman spectra revealed that, the reconstruction of M(OH)x/Fe3O4/IF boosted the OER activity. Theoretical calculation revealed favorable absorption of O2 at Ni site of M(OH)x/Fe3O4/IF during OER. This work highlights the reconstruction structurally definite catalysts for promoting the catalytic activity toward OER and the large-scale electrocatalysis of water.
在水的电催化大规模制氢过程中,通常使用镍基和/或铁基催化剂,但这些催化剂在高电流密度(500 mA cm-2)下具有超高过电位和稳定性差的缺点。在此,我们制备了重构的 M(OH)x/Fe3O4(M = Ni、Fe)阵列,用于促进氧进化反应(OER)。所制备的 M(OH)x/Fe3O4 长在泡沫铁上(M(OH)x/Fe3O4/IF)催化剂在 50 mA cm-2 和 500 mA cm-2 的电流密度下,OER 的过电位分别为 214 mV 和 311 mV。原位拉曼光谱显示,M(OH)x/Fe3O4/IF 的重构提高了 OER 的活性。理论计算显示,在 OER 过程中,M(OH)x/Fe3O4/IF 的 Ni 位点有利于吸收 O2。这项工作强调了重构结构明确的催化剂对提高 OER 催化活性和大规模水电催化的作用。