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Enhanced Sulfur Resistance of Sb-Mn-Ce/TiO2 Catalysts via Heteropoly Acids Modification: Mechanistic Insights 通过杂多酸改性增强Sb-Mn-Ce/TiO2催化剂的抗硫性能:机理研究
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-05-02 DOI: 10.1007/s10562-026-05389-2
Dongjie Yan, Yuan Chai, Xiaoling Hong, Xinyi Wu, Ya Yu, Hao Gong, Yongbao Pan
{"title":"Enhanced Sulfur Resistance of Sb-Mn-Ce/TiO2 Catalysts via Heteropoly Acids Modification: Mechanistic Insights","authors":"Dongjie Yan,&nbsp;Yuan Chai,&nbsp;Xiaoling Hong,&nbsp;Xinyi Wu,&nbsp;Ya Yu,&nbsp;Hao Gong,&nbsp;Yongbao Pan","doi":"10.1007/s10562-026-05389-2","DOIUrl":"10.1007/s10562-026-05389-2","url":null,"abstract":"<div><p>In this study, four different heteropoly acids (HPAs) were doped into Sb-Mn-Ce/TiO<sub>2</sub> catalysts via an in-situ deposition method. The catalytic activity and sulfur resistance of the catalysts were evaluated, and the mechanisms behind their sulfur resistance were analyzed. The results indicate that doping with phosphotungstic acid (HPW) can effectively enhance the sulfur resistance of Sb-Mn-Ce/TiO<sub>2</sub> catalyst, enabling it to maintain high activity for a long time even in a flue gas environment with high SO<sub>2</sub> concentration: after 300 min of exposure at 150 ℃ and 100 ppm SO<sub>2</sub>, the NO<sub>x</sub> conversion rate of Sb-Mn-Ce/TiO<sub>2</sub>-HPW still remains above 80%, which is superior to that of the unmodified catalyst and other HPAs-modified samples. In contrast, the other three heteropoly acids-phosphomolybdic acid (HPMo), silicotungstic acid (HSiW), and silicomolybdic acid (HSiMo)-lowered the sulfur resistance of the catalysts. HPW has enhanced the sulfur resistance of the Sb-Mn-Ce/TiO<sub>2</sub> catalyst through various mechanisms, including: 1. Increasing the average pore size of the catalyst. 2. Enhancing surface acidity and NH<sub>3</sub> adsorption ability of the catalyst. 3. Enhancing the redox performance of the catalyst.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Highly Efficient Aerobic Oxidation of Benzyl Alcohol to Benzaldehyde Over Mn–Ni–O Catalysts Mn-Ni-O催化剂上苯甲醇高效好氧氧化制苯甲醛的研究
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-30 DOI: 10.1007/s10562-026-05378-5
Fan Xu, Wenjie Yang, Xuemei Jing, Chuchu Zhang, Guojun Shi
{"title":"Highly Efficient Aerobic Oxidation of Benzyl Alcohol to Benzaldehyde Over Mn–Ni–O Catalysts","authors":"Fan Xu,&nbsp;Wenjie Yang,&nbsp;Xuemei Jing,&nbsp;Chuchu Zhang,&nbsp;Guojun Shi","doi":"10.1007/s10562-026-05378-5","DOIUrl":"10.1007/s10562-026-05378-5","url":null,"abstract":"<div>\u0000 \u0000 <p>Benzaldehyde is an important intermediate in industrial production and is widely used in the fields of foods, medicines, pesticides, etc. The production of benzaldehyde via chlorination-hydrolysis or direct oxidation of toluene suffers from severe equipment corrosion and chlorine-containing by-products. Using heterogeneous transition metal oxides as catalysts, the oxidation of benzyl alcohol to benzaldehyde with molecular oxygen is favorable because of mild reaction conditions, high production efficiency, and chlorine-free products. Herein, Mn–Ni bimetallic catalysts were fabricated by a specific co-precipitation method, and the influence of catalyst composition and calcination temperature on the oxidative performance of benzyl alcohol was investigated. Under the optimized reaction conditions, the conversion of benzyl alcohol reached 65.6%, with a selectivity of 100% to the target benzaldehyde. Recycling tests showed that the prepared Mn–Ni bimetallic catalyst maintained constant activity, with no significant changes in the composition, morphology, phase, and chemical state of the elements upon catalyst recovery, demonstrating reliable stability. The synthesis of Mn–Ni bimetallic catalysts and their performance in the oxidation of benzyl alcohol can provide valuable insights into the industrial production of chloro-free benzaldehyde via the aerobic oxidation of benzyl alcohol.</p>\u0000 <span>AbstractSection</span>\u0000 Graphical Abstract\u0000 <div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div>\u0000 \u0000 </div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147797164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient Methylene Blue Degradation by NiCo-LDH-Activated Peroxymonosulfate: Efficiency, Mechanism, and Degradation Route nico - ldh活化过氧单硫酸盐高效降解亚甲基蓝:效率、机理及降解途径
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-29 DOI: 10.1007/s10562-026-05394-5
Suya Zhao, Yuexiang Zhang, Yaling Lu, Xifeng Lv, Jianbo Zhao, Weiliang Tian, Libing Hu
{"title":"Efficient Methylene Blue Degradation by NiCo-LDH-Activated Peroxymonosulfate: Efficiency, Mechanism, and Degradation Route","authors":"Suya Zhao,&nbsp;Yuexiang Zhang,&nbsp;Yaling Lu,&nbsp;Xifeng Lv,&nbsp;Jianbo Zhao,&nbsp;Weiliang Tian,&nbsp;Libing Hu","doi":"10.1007/s10562-026-05394-5","DOIUrl":"10.1007/s10562-026-05394-5","url":null,"abstract":"<div><p>Although layered double hydroxides (LDHs) have been substantially applied as catalysts for the elimination of dye pollutants, the mechanism of the process still needs to be fully understood. Herein, NiCo-LDH[X] catalysts with different Ni: Co ratios (X = 1:1, 1:2, and 1:3) were prepared via the coprecipitation method, and we explored their effectiveness in the activation of peroxymonosulfate (PMS) to achieve efficient degradation of methylene blue (MB). The effect of several parameters on the catalytic performance of NiCo-LDH[X] was systematically evaluated. Following thorough experimental investigations, the activation mechanism and MB degradation pathways were proposed. Among the different NiCo-LDH[X] catalysts, NiCo-LDH[1:2] showed methylene blue degradation performance. Experimental results showed that this catalyst achieved MB degradation efficiency of 97.2% within 12 min, and a total organic carbon removal rate of 67.1% within 60 min, while exhibiting remarkable adaptability, reusability, and stability, as confirmed by post-catalytic characterization. Radical scavenging studies identified superoxide radicals (O<sub>2</sub><sup>·−</sup>), sulfate radicals (SO<sub>4</sub><sup>·−</sup>), and singlet oxygen (<sup>1</sup>O<sub>2</sub>) as the primary reactive oxygen species generated in the NiCo-LDH[1:2]/PMS system. The results of X-ray photoelectron spectroscopy (XPS) analysis clarified the roles of oxygen vacancies and Co sites as active sites, demonstrating the reversible redox behavior of NiCo-LDH[1:2] through Ni<sup>2+</sup>/Ni<sup>3+</sup> and Co<sup>2+</sup>/Co<sup>3+</sup> cycles. This study highlights the enhanced efficacy of PMS by NiCo-LDH catalysis and elucidates the activation mechanism of these catalysts in the removal of organic contaminants.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147797030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Poly(vinylimidazole)-Grafted Graphene Oxide Supported Palladium as a Dual-Function Pickering Emulsion Catalyst for Aqueous Suzuki Coupling 聚乙烯酰咪唑接枝氧化石墨烯负载钯作为双功能酸洗乳液催化剂用于铃木水偶联
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-27 DOI: 10.1007/s10562-026-05386-5
Zihan Li, Xing-Bao Wang, Lulu Xing, Yuanyuan Shan
{"title":"Poly(vinylimidazole)-Grafted Graphene Oxide Supported Palladium as a Dual-Function Pickering Emulsion Catalyst for Aqueous Suzuki Coupling","authors":"Zihan Li,&nbsp;Xing-Bao Wang,&nbsp;Lulu Xing,&nbsp;Yuanyuan Shan","doi":"10.1007/s10562-026-05386-5","DOIUrl":"10.1007/s10562-026-05386-5","url":null,"abstract":"<div><p>Suzuki-Miyaura cross-coupling under aqueous biphasic conditions remains challenging due to limited interfacial mass transfer and catalyst deactivation. Although Pickering emulsions offer a practical solution by creating large and stable oil–water interfaces, integrating emulsion stabilization and catalytic activity into a single solid material remains nontrivial. Herein, we develop palladium nanoparticles supported on poly(1-vinylimidazole)-grafted graphene oxide (Pd/mGO-PVIm) as a catalyst that combines interfacial stabilization with catalytic activity for aqueous Suzuki-Miyaura coupling. Poly(vinylimidazole) was grafted onto graphene oxide to regulate amphiphilicity and introduce nitrogen coordination sites, enabling stable oil-in-water Pickering emulsions while enhancing Pd dispersion via Pd−N interactions. Consequently, Pd/mGO-PVIm shows improved catalytic efficiency compared with conventional biphasic systems. Under optimized conditions, it delivers near-quantitative conversion of aryl iodides in pure water at 0.0017 mmol Pd, with a turnover frequency (TOF) of 507,740 h<sup>−1</sup> calculated from the initial rate. The catalyst exhibits broad substrate scope and retains activity over multiple cycles. This work provides a green and efficient approach for biphasic Suzuki coupling.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Synthesis Methods for ZnZrOx Oxides Associated with SAPO-34 on the Production of Light Olefins By CO2 Hydrogenation ZnZrOx氧化物与SAPO-34结合的合成方法对CO2加氢生产轻烯烃的影响
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-27 DOI: 10.1007/s10562-026-05384-7
Ananda Vallezi Paladino Lino, Elisabete Moreira Assaf, José Mansur Assaf
{"title":"Effect of Synthesis Methods for ZnZrOx Oxides Associated with SAPO-34 on the Production of Light Olefins By CO2 Hydrogenation","authors":"Ananda Vallezi Paladino Lino,&nbsp;Elisabete Moreira Assaf,&nbsp;José Mansur Assaf","doi":"10.1007/s10562-026-05384-7","DOIUrl":"10.1007/s10562-026-05384-7","url":null,"abstract":"<div>\u0000 \u0000 <p>A ZnZrO<sub><i>x</i></sub> mixed oxide catalyst (denoted ZZ) was synthesized for use in the generation of methanol as an intermediate in the methanol-mediated CO<sub>2</sub> hydrogenation reaction to produce light olefins. The aim was to achieve improvements in the textural and morphological properties of oxide, comparing the effects of different preparation methods, including the evaporation-induced self-assembly (EI) technique in the presence of the P123<sup>®</sup> copolymer as a mesoporous template. The resulting catalysts were combined with SAPO-34 zeolite synthesized by the hydrothermal route, in the form of simple physical mixture. Among the tandem catalysts, the highest CO<sub>2</sub> conversion achieved with the ZZ (EI) + SAPO-34 combination could be attributed to the higher specific surface area of the ZZ oxide, which provided more accessible routes to sites for CO<sub>2</sub> adsorption. The potential of zeolite for use in the synthesis of light olefins was demonstrated by comparing it to a conventional Cu/Zn/Al catalyst.</p>\u0000 <span>AbstractSection</span>\u0000 Graphical Abstract\u0000 <div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div>\u0000 \u0000 </div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-026-05384-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Copper-Induced Octahedral Al and Ca-O-Al Spinel Catalysed Selective Oxidation of Alcohol to Aldehyde Using Thermal and Photocatalytic Methods 铜诱导八面体Al和Ca-O-Al尖晶石用热催化和光催化方法催化醇选择性氧化制醛
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-27 DOI: 10.1007/s10562-026-05383-8
Kajal Pawar, Bhagyashree Megha, Pavan More
{"title":"Copper-Induced Octahedral Al and Ca-O-Al Spinel Catalysed Selective Oxidation of Alcohol to Aldehyde Using Thermal and Photocatalytic Methods","authors":"Kajal Pawar,&nbsp;Bhagyashree Megha,&nbsp;Pavan More","doi":"10.1007/s10562-026-05383-8","DOIUrl":"10.1007/s10562-026-05383-8","url":null,"abstract":"<div><p>The selective oxidation of lignin feedstock-derived alcohol is a sustainable process for the synthesis of aldehyde. Vanillyl alcohol is used as a model component of lignin feedstock-derived alcohol. Moreover, Cu-impregnated CaAl<sub>2</sub>O<sub>4</sub> spinel catalysts were synthesised and investigated for their catalytic efficiency in the selective oxidation of vanillyl alcohol via thermal and photochemical routes. Copper impregnated into the CaAl<sub>2</sub>O<sub>4</sub> spinel support significantly altered its structural, morphological, and catalytic properties, as confirmed by extensive characterisation techniques such as XRD, Raman spectroscopy, FTIR, XPS, HR-TEM, surface area analysis, LSV, photoluminescence studies, and ICP-AES. 5% Cu/CaAl<sub>2</sub>O<sub>4</sub> catalyst showed 98.1% vanillin with 99.6% selectivity, demonstrating exceptional efficiency. Catalytic activity greatly increased due to the high surface area and evenly distributed active sites. The presence of Cu<sup>2+</sup>, octahedral Al<sup>3+</sup>, and Ca-O-Al active sites has been identified as critical to the observed activity. Moreover, the catalyst showed higher conversion and selectivity for commercially significant aliphatic and aromatic alcohols. A thorough structural-activity relationship was discovered, emphasising the influence of copper on catalyst structure. Furthermore, the study compares the mechanisms and performance of thermal and photocatalytic alcohol selective oxidation. Mechanistic insights were obtained through ATR-FTIR adsorption studies and in-situ ESR spectroscopy, which provided evidence for the formation of reactive intermediates during the reaction.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bimetallic CoMoS4 Decorated MOF-Derived CdS: A Synergistic Heterostructure for Enhanced Photocatalytic Hydrogen Evolution 双金属CoMoS4修饰mof衍生CdS:增强光催化析氢的协同异质结构
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-27 DOI: 10.1007/s10562-026-05374-9
Irem Firtina-Ertis
{"title":"Bimetallic CoMoS4 Decorated MOF-Derived CdS: A Synergistic Heterostructure for Enhanced Photocatalytic Hydrogen Evolution","authors":"Irem Firtina-Ertis","doi":"10.1007/s10562-026-05374-9","DOIUrl":"10.1007/s10562-026-05374-9","url":null,"abstract":"<div><p>This study developed a novel CdS-based photocatalyst by employing a Cd-MOF precursor and integrating CoMoS<sub>4</sub> as a transition bimetallic cocatalyst by two-step hydrothermal method. CdS was initially obtained by converting Cd-MOF through a sulfidation process, followed by the controlled incorporation of CoMoS<sub>4</sub> at varying molar ratios (2.5%, 5%, and 10%). Structural and morphological analyses (SEM-EDS, XRD, FT-IR) confirmed the transformation of Cd-MOF to crystalline CdS and the successful formation of CoMoS<sub>4</sub>/CdS heterojunctions. The incorporation of 2.5% CoMoS<sub>4</sub> significantly increased the BET surface area. UV–vis diffuse reflectance spectroscopy revealed a red-shifted absorption edge and a narrowed band gap of 2.26 eV for the 2.5% CoMoS<sub>4</sub>/CdS composite. Photoluminescence (PL) quenching and XPS analysis indicated improved charge separation and strong interfacial bonding. Mott–Schottky (M-S) measurements revealed conduction band potentials for CdS and CoMoS<sub>4</sub>, supporting the proposed heterojunction mechanism. Among the synthesized composites, the 2.5% CoMoS<sub>4</sub>/CdS catalyst exhibited the highest photocatalytic hydrogen production rate of 5.8 mmol/g·h under visible light, representing a tenfold increase compared to bare CdS (0.52 mmol/g·h). These findings demonstrate that CoMoS<sub>4</sub> is an effective cocatalyst for enhancing hydrogen generation through improved light harvesting and charge-carrier separation, offering a promising strategy for solar-to-hydrogen energy conversion.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Engineering the Highly Efficient Electrocatalyst Based on Pd and Metal Oxide Composites for Methanol Electrooxidation 基于Pd和金属氧化物复合材料的甲醇电氧化高效电催化剂的设计
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-27 DOI: 10.1007/s10562-026-05368-7
Ramin Kamali, Ali Reza Rezvani, Sania Saheli
{"title":"Engineering the Highly Efficient Electrocatalyst Based on Pd and Metal Oxide Composites for Methanol Electrooxidation","authors":"Ramin Kamali,&nbsp;Ali Reza Rezvani,&nbsp;Sania Saheli","doi":"10.1007/s10562-026-05368-7","DOIUrl":"10.1007/s10562-026-05368-7","url":null,"abstract":"<div><p>In this work, new electrocatalysts of SnO₂/Pd/PdO, Ni/NiO/Pd/PdO, and Ni/NiO/SnO<sub>2</sub>/Pd/PdO were prepared and thoroughly characterized for the methanol oxidation reaction (MOR) in direct methanol fuel cells. Exact quantitative insight into the composite formation was obtained from structural and morphological characterizations. The crystallite size of the active Pd phase, obtained from Williamson-Hall plots, showed a formation trend that increased from 6.75 nm in SnO<sub>2</sub>/Pd/PdO to 13.38 nm for the fully integrated Ni/NiO/SnO<sub>2</sub>/Pd/PdO composite, using coupled X-ray diffraction (XRD) analysis and further corroborated through Williamson-Hall calculations. This integration in structure gave rise to a positive lattice strain (2.84 × 10<sup>− 3</sup>) and the lattice constant was also increased (a = 3.902 Å). FESEM and EDX morphological studies indicated largely isolated nanoparticle networks resulting from the incorporation of SnO<sub>2</sub> as a dispersing agent, leading to a reduction in particle size from ~ 51 nm (in Ni/NiO/Pd/PdO) to an optimum range of 30–46 nm, thus preventing the aggregation of Pd/PdO. A series of electrochemical characterizations showed that the Ni/NiO/SnO<sub>2</sub>/Pd/PdO composite affords excellent electrocatalytic performance with a peak current density up to 62.6 mA/cm<sup>2</sup> and an activation energy value as low as 28.79 kJ/mol. This catalytic activity is far superior to recently reported benchmark catalysts such as PdNiAg nanoparticles (43.92 mA/cm<sup>2</sup>) and bare Pd/GC (5 mA/cm<sup>2</sup>), mainly owing to increased CO tolerance and a highly efficient diffusion-controlled oxidation mechanism. In addition, the enhanced catalyst showed excellent stability and reproducibility with 98% retention of its initial peak current after 20 cycles. The superior performance is attributed to the strong synergistic effect and charge transfer dynamics between Ni/NiO, SnO<sub>2</sub>, and Pd/PdO, as well as abundant active sites preventing catalyst poisoning, indicating a promising anode candidate for practical DMFC applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cobalt Catalysts Supported on CTAB-Functionalized Reduced Graphene Oxide for Heterogeneous Fenton-like Processes ctab功能化还原氧化石墨烯负载钴催化剂用于非均相fenton类工艺
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-27 DOI: 10.1007/s10562-026-05391-8
Ramiro Picoli Nippes, Paula Derksen Macruz
{"title":"Cobalt Catalysts Supported on CTAB-Functionalized Reduced Graphene Oxide for Heterogeneous Fenton-like Processes","authors":"Ramiro Picoli Nippes,&nbsp;Paula Derksen Macruz","doi":"10.1007/s10562-026-05391-8","DOIUrl":"10.1007/s10562-026-05391-8","url":null,"abstract":"<div><p>The development of efficient heterogeneous catalysts for Fenton-type processes is essential for advancing wastewater treatment technologies. In this study, cobalt-based catalysts supported on reduced graphene oxide (rGO) were synthesized using cetyltrimethylammonium bromide (CTAB) as a structure-directing agent. The materials were prepared via wet impregnation and characterized by multiple techniques. The results indicate that CTAB promotes improved dispersion of graphene sheets and cobalt species during synthesis, acting primarily as a structure-directing agent. Among the evaluated materials, the 15Co/rGOF catalyst exhibited the highest catalytic performance, achieving 97% tartrazine removal over a wide pH range, including near-neutral conditions. The degradation kinetics followed a pseudo-first-order model (k = 0.0204 min<sup>− 1</sup>), and radical scavenging experiments using isopropanol confirmed that hydroxyl radicals (•OH) are the dominant reactive species. The catalyst also demonstrated good stability over multiple reuse cycles, with negligible cobalt leaching. Furthermore, a total organic carbon (TOC) reduction of approximately 95% and toxicity decrease, evaluated using <i>Lactuca sativa</i>, confirmed the high oxidative efficiency of the process. These findings highlight the potential of rGO-supported cobalt catalysts as promising materials for heterogeneous Fenton-like applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 5","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-026-05391-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction to: Effects of Cerium Oxide Incorporation and Zeolite Cationic Form on ZSM-5 Catalysts for Glycerol Dehydration 修正:氧化铈掺入和沸石阳离子形态对ZSM-5催化剂甘油脱水的影响
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2026-04-27 DOI: 10.1007/s10562-026-05343-2
Billy Joy Vargas, Caroline Pereira Roldão, Rui dos Santos Ferreira Filho, Juliana Pereira Roldão, Edilene Deise da Silva Ferracine, Cezar Augusto da Rosa, Vanessa Bongalhardo Mortola
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