Materials Today Catalysis最新文献_第9页

Synergistic catalysis in loaded PtRu alloy nanoparticles to boost base-free aerobic oxidation of 5-hydroxymethylfurfural 负载PtRu合金纳米颗粒协同催化促进5-羟甲基糠醛无碱有氧氧化

Materials Today Catalysis Pub Date : 2023-08-18 DOI: 10.1016/j.mtcata.2023.100013

Hao Zhang , Tianyu Gao , Qizhao Zhang , Bang Gu , Qinghu Tang , Qiue Cao , Wenhao Fang

{"title":"Synergistic catalysis in loaded PtRu alloy nanoparticles to boost base-free aerobic oxidation of 5-hydroxymethylfurfural","authors":"Hao Zhang , Tianyu Gao , Qizhao Zhang , Bang Gu , Qinghu Tang , Qiue Cao , Wenhao Fang","doi":"10.1016/j.mtcata.2023.100013","DOIUrl":"https://doi.org/10.1016/j.mtcata.2023.100013","url":null,"abstract":"<div>The synergistic catalysis of dual metal sites is vital for selective activation of complicated chemical bonds in biomass compounds. The base-free selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) using air as oxidant and water as solvent is a highly sustainable upgrading process for cellulosic carbohydrates. In this work, a series of PtxRu-MgAlO (x = 0.5, 1, 2 and 3, in mole) nanocatalysts with controlled particle sizes (ca. 2 nm) were synthesized by a PVP-assisted adsorption method. The Pt2Ru-MgAlO catalyst showed 99% selectivity of FDCA with full conversion of HMF at only 100 °C under 0.2 MPa of air. In the meantime, an initial reaction rate of HMF of 2.8 mmol molM−1 s−1 and an intrinsic turnover frequency of 61.5 h−1 were attained, respectively. Besides, this catalyst exhibited superior stability during five consecutive reuses without metal leaching. It was disclosed that the Pt-Ru interaction played critical roles in determining the intrinsic activity and the C<img>O bond activation of the prepared PtxRu-MgAlO catalysts. Kinetic experiments combined with in situ chemisorption techniques clearly unraveled adsorption and activation processes of C<img>O bond on Pt0-Ru0 sites. To the best of our knowledge, this work firstly reported a PtRu bimetallic catalyst for aerobic oxidation of HMF and provided insight into synergistic catalysis.</div>","PeriodicalId":100892,"journal":{"name":"Materials Today Catalysis","volume":"3 ","pages":"Article 100013"},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49765542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The emergence of single-atom-layer catalysis 单原子层催化的出现

Materials Today Catalysis Pub Date : 2023-06-01 DOI: 10.1016/j.mtcata.2023.100004

Mingyu Ma , Chengshi Gong , Xiuyun An , Zude Shi , Zheng Liu , Yongmin He

引用次数: 3

Recent progress of low-dimensional metal sulfides photocatalysts for energy and environmental applications 用于能源和环境应用的低维金属硫化物光催化剂的最新进展

Materials Today Catalysis Pub Date : 2023-06-01 DOI: 10.1016/j.mtcata.2023.100001

Jun Di , Wei Jiang

{"title":"Recent progress of low-dimensional metal sulfides photocatalysts for energy and environmental applications","authors":"Jun Di , Wei Jiang","doi":"10.1016/j.mtcata.2023.100001","DOIUrl":"https://doi.org/10.1016/j.mtcata.2023.100001","url":null,"abstract":"<div>Due to the unique structure and electronic properties of low-dimensional materials, enormous potential can be achieved over low-dimensional materials for high-efficiency photocatalytic activity. Metal sulfide semiconductors with abundant optionality of various metal element, multi metal combination and ratio regulation shows favorable electronic structure adjustability. This review summarizes recent advances in the design, tuning and photocatalytic applications of low-dimensional metal sulfides. We start with the introduction of multifarious types of low-dimensional metal sulfides photocatalysts, including binary metal sulfides (such as CdS, ZnS, MoS2, SnS, SnS2, Bi2S3, In2S3, CuS, ReS2), ternary metal sulfides (such as In4SnS8, ZnIn2S4, CdIn2S4, CuInS2, CuIn5S8) and others (such as Cu-Zn-In-S, Cu-Zn-Ga-S, CuInP2S6, AgInP2S6). Then, the tuning strategies to improve the photocatalytic performance of low-dimensional metal sulfides have been summarized with the emphasis on structure–performance correlation, such as facet engineering, exposure of active edges, elemental doping, defect engineering, co-catalyst loading, single atom engineering, polarization enhancement and junction construction. The advancements in versatile photocatalytic applications of low-dimensional metal sulfides–based photocatalysts in the areas of environmental purification, water splitting, CO2 reduction, N2 reduction and organic synthesis are discussed. Finally, we end this review with a look into the opportunities and challenges of low-dimensional metal sulfides in future study.</div>","PeriodicalId":100892,"journal":{"name":"Materials Today Catalysis","volume":"1 ","pages":"Article 100001"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49748579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Fe-doping-induced cation substitution and anion vacancies promoting Co3O4 hexagonal nanosheets for efficient overall water splitting Fe掺杂诱导的阳离子取代和阴离子空位促进Co3O4六角纳米片的有效整体水分解

Materials Today Catalysis Pub Date : 2023-06-01 DOI: 10.1016/j.mtcata.2023.100002

Peifang Guo , Lingxia Shi , Da Liu , Xinqiang Wang , Fan Gao , Yuan Ha , Jie Yin , Miao Liu , Hongge Pan , Renbing Wu

{"title":"Fe-doping-induced cation substitution and anion vacancies promoting Co3O4 hexagonal nanosheets for efficient overall water splitting","authors":"Peifang Guo , Lingxia Shi , Da Liu , Xinqiang Wang , Fan Gao , Yuan Ha , Jie Yin , Miao Liu , Hongge Pan , Renbing Wu","doi":"10.1016/j.mtcata.2023.100002","DOIUrl":"https://doi.org/10.1016/j.mtcata.2023.100002","url":null,"abstract":"<div>Water electrolysis is a green technology for hydrogen fuel production, but greatly hampered by the slow kinetics of the anodic oxygen evolution reaction (OER) and the cathodic hydrogen evolution reaction (HER). In this work, we report an efficient strategy to simultaneously promote OER and HER performance on Co3O4 hexagonal nanosheets via Fe-doping-induced cation substitution and anion vacancies. Benefiting from the integrated advantages of well-defined ultrathin nanosheets, abundant vacancies, and unique three-dimensional electrode configuration, the optimized Fe-doped Co3O4 hexagonal nanosheets/nickel foam (Fe0.4Co2.6O4 HNSs/NF) can achieve overpotentials of 328 mV at 100 mA cm−2 for OER and 315 mV at 500 mA cm−2 for HER, respectively, which is comparable to those of the benchmark noble electrocatalysts. More importantly, the Fe0.4Co2.6O4 HNSs/NF-assembled electrolyzer for overall water splitting can deliver a current density of 100 mA cm−2 at a cell voltage as low as 1.66 V and work steadily at 50 mA cm−2 with a negligible fading up to 140 h.</div>","PeriodicalId":100892,"journal":{"name":"Materials Today Catalysis","volume":"1 ","pages":"Article 100002"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49748253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Graphitic carbon nitride-based electrocatalysts for energy applications 用于能源应用的石墨氮化碳基电催化剂

Materials Today Catalysis Pub Date : 2023-06-01 DOI: 10.1016/j.mtcata.2023.100003

Yaping Chen , Bingxing Zhang , Yongfeng Liu , Jian Chen , Hongge Pan , Wenping Sun

引用次数: 1