Pub Date : 2026-04-01Epub Date: 2026-01-25DOI: 10.1016/j.cattod.2026.115699
Muhammad Irfan Malik , Nicolas Abatzoglou , Jasmin Blanchard , Sabrina Bahia Karakache , Inès Esma Achouri
This study examines the performance of a Ni-UGSO catalyst for steam methane reforming under elevated pressure. The catalyst achieved near-equilibrium methane conversion at 11 bar and 820 °C with a steam-to-carbon ratio (S/C) of 2. Nickel supported on UGSO (upgraded slag oxides) pellets maintained stable activity within S/C = 1.7–2 at a gas hourly space velocity (GHSV) of 1000 L h⁻¹ kgcat⁻¹ . However, operation under lower steam conditions (S/C ≤ 1.5) led to surface pitting and the growth of bamboo-type carbon filaments, resulting in catalyst deactivation. After regeneration, the catalyst recovered its surface morphology and catalytic activity, achieving 80 % methane conversion and an H₂/CO ratio of 5.45 at 10 bar and 820 °C. The strong interaction between nickel and the spinel–silicate matrix minimised sintering and enhanced lattice oxygen mobility, as demonstrated by the detection of NiOOH and FeOOH species through various characterisation techniques. These results confirm the structural stability and regenerability of Ni-UGSO pellets during prolonged high-pressure syngas production.
{"title":"Catalytic performance of pelletized Ni-UGSO in steam methane reforming at elevated pressures","authors":"Muhammad Irfan Malik , Nicolas Abatzoglou , Jasmin Blanchard , Sabrina Bahia Karakache , Inès Esma Achouri","doi":"10.1016/j.cattod.2026.115699","DOIUrl":"10.1016/j.cattod.2026.115699","url":null,"abstract":"<div><div>This study examines the performance of a Ni-UGSO catalyst for steam methane reforming under elevated pressure. The catalyst achieved near-equilibrium methane conversion at 11 bar and 820 °C with a steam-to-carbon ratio (S/C) of 2. Nickel supported on UGSO (upgraded slag oxides) pellets maintained stable activity within S/C = 1.7–2 at a gas hourly space velocity (GHSV) of 1000 L h⁻¹ kgcat⁻¹ . However, operation under lower steam conditions (S/C ≤ 1.5) led to surface pitting and the growth of bamboo-type carbon filaments, resulting in catalyst deactivation. After regeneration, the catalyst recovered its surface morphology and catalytic activity, achieving 80 % methane conversion and an H₂/CO ratio of 5.45 at 10 bar and 820 °C. The strong interaction between nickel and the spinel–silicate matrix minimised sintering and enhanced lattice oxygen mobility, as demonstrated by the detection of NiOOH and FeOOH species through various characterisation techniques. These results confirm the structural stability and regenerability of Ni-UGSO pellets during prolonged high-pressure syngas production.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"467 ","pages":"Article 115699"},"PeriodicalIF":5.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-22DOI: 10.1016/j.cattod.2026.115694
Yan-Qin Guo, Zhou Xu, Li Wen, Yun-Hui Cheng, Mao-Long Chen
The titanium-based metal–organic framework MIL-125(Ti), with a wide bandgap of 3.20 eV, suffers from poor visible-light utilization and rapid charge recombination. To overcome this limitation, a Z-scheme MOF-on-MOF heterojunction was constructed by integrating narrow-bandgap PCN-224 (1.70 eV) with MIL-125 using polyvinylpyrrolidone as a surfactant mediator. The formation of the heterojunction successfully reduced the optical bandgap to 2.23 eV, quantitatively confirming the extended visible-light harvesting. The resulting MIL-125@PCN-224 composite displayed outstanding photocatalytic activity toward methylene blue (MB) degradation. Under visible-light irradiation, it achieved 91.17 % MB (30 mg/L) removal within one hour, with a kinetic rate constant kapp of 0.0233 min−1, which is 3.99 times higher than that of MIL-125. This enhanced performance is ascribed to the direct Z-scheme charge-transfer pathway. Band structure analysis provides quantitative support: the conduction band potentials of MIL-125 and PCN-224 were determined to be −0.63 V and −0.74 V vs. NHE, respectively. This configuration facilitates efficient charge separation while maintaining strong redox power, allowing electrons in PCN-224 to reduce O2 to generate superoxide anions (·O2−), consistent with the radical trapping and ESR identification of superoxide anions (·O2−) and singlet oxygen (1O2) as the dominant reactive species. Furthermore, composite exhibited excellent stability over a wide pH range and maintained high efficiency in real water matrices. These results demonstrate that heterojunction construction is an effective strategy for enhancing photocatalytic efficiency.
{"title":"Construction of a Z-Scheme MIL-125@PCN-224 MOF-on-MOF heterojunction for efficient visible-light photodegradation of methylene blue","authors":"Yan-Qin Guo, Zhou Xu, Li Wen, Yun-Hui Cheng, Mao-Long Chen","doi":"10.1016/j.cattod.2026.115694","DOIUrl":"10.1016/j.cattod.2026.115694","url":null,"abstract":"<div><div>The titanium-based metal–organic framework MIL-125(Ti), with a wide bandgap of 3.20 eV, suffers from poor visible-light utilization and rapid charge recombination. To overcome this limitation, a Z-scheme MOF-on-MOF heterojunction was constructed by integrating narrow-bandgap PCN-224 (1.70 eV) with MIL-125 using polyvinylpyrrolidone as a surfactant mediator. The formation of the heterojunction successfully reduced the optical bandgap to 2.23 eV, quantitatively confirming the extended visible-light harvesting. The resulting MIL-125@PCN-224 composite displayed outstanding photocatalytic activity toward methylene blue (MB) degradation. Under visible-light irradiation, it achieved 91.17 % MB (30 mg/L) removal within one hour, with a kinetic rate constant k<sub>app</sub> of 0.0233 min<sup>−1</sup>, which is 3.99 times higher than that of MIL-125. This enhanced performance is ascribed to the direct Z-scheme charge-transfer pathway. Band structure analysis provides quantitative support: the conduction band potentials of MIL-125 and PCN-224 were determined to be −0.63 V and −0.74 V vs. NHE, respectively. This configuration facilitates efficient charge separation while maintaining strong redox power, allowing electrons in PCN-224 to reduce O<sub>2</sub> to generate superoxide anions (·O<sub>2</sub><sup>−</sup>), consistent with the radical trapping and ESR identification of superoxide anions (·O<sub>2</sub><sup>−</sup>) and singlet oxygen (<sup>1</sup>O<sub>2</sub>) as the dominant reactive species. Furthermore, composite exhibited excellent stability over a wide pH range and maintained high efficiency in real water matrices. These results demonstrate that heterojunction construction is an effective strategy for enhancing photocatalytic efficiency.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"467 ","pages":"Article 115694"},"PeriodicalIF":5.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2025-11-19DOI: 10.1016/j.cattod.2025.115637
Izabela I. Rzeznicka , Mariusz Grabda , Alicja Klimkowicz , Hideyuki Horino , Jacek Grams , Lucas Ramos , Anuj Kumar Chandel
In this study, pyrolytic carbons derived from kraft lignin extracted from sugarcane bagasse and straw were systematically characterized to elucidate the relationship between their structure, composition, and electrocatalytic performance toward the oxygen reduction (ORR) and oxygen evolution (OER) reactions in alkaline media. Elemental analysis of lignin precursors revealed that straw lignin has a higher silicate content than bagasse lignin, which, together with pyrolysis temperature, strongly influences specific surface area, defect density, and degree of graphitization. Cyclic voltammetry shows that both carbons exhibit measurable ORR activity in 1 M KOH, whereas no significant OER activity was observed. The ORR proceeds mainly through a two-electron pathway producing peroxide intermediates for carbons obtained at 550 °C, while partial graphitization at 1000 °C promotes a mixed two–four-electron process associated with enhanced conductivity and reorganization of edge defects. Straw-derived carbons obtained at 1000 °C displayed higher cathodic currents but also greater instability at anodic potentials, indicating enhanced surface reactivity yet lower corrosion resistance. Overall, sugarcane-derived lignins are shown to be versatile carbon materials. Their tunable structural features, from highly defective amorphous networks to partially graphitized domains, enable application-specific optimization favoring ORR electrocatalysis in alkaline fuel cells and metal-air batteries.
本研究对从蔗渣和秸秆中提取的硫酸盐木质素的热解碳进行了系统表征，以阐明其结构、组成及其在碱性介质中氧还原（ORR）和析氧（OER）反应中的电催化性能之间的关系。对木质素前驱体的元素分析表明，秸秆木质素的硅酸盐含量高于甘蔗渣木质素，而硅酸盐含量与热解温度对秸秆木质素的比表面积、缺陷密度和石墨化程度有较大影响。循环伏安法表明，这两种碳在1 M KOH中均表现出可测量的ORR活性，而OER活性不显著。ORR主要通过双电子途径为550 °C下获得的碳生成过氧化物中间体，而1000 °C下的部分石墨化促进了与电导率增强和边缘缺陷重组相关的混合2 - 4电子过程。在1000 °C下获得的秸秆衍生碳表现出更高的阴极电流，但在阳极电位下也表现出更大的不稳定性，表明表面反应性增强，但耐腐蚀性较低。总之，甘蔗衍生木质素是一种通用的碳材料。从高度缺陷的非晶态网络到部分石墨化域，它们的可调结构特征使碱性燃料电池和金属-空气电池中的ORR电催化具有特定的应用优化优势。
{"title":"Electrocatalytic applications of pyrolytic carbons derived from sugarcane kraft lignin","authors":"Izabela I. Rzeznicka , Mariusz Grabda , Alicja Klimkowicz , Hideyuki Horino , Jacek Grams , Lucas Ramos , Anuj Kumar Chandel","doi":"10.1016/j.cattod.2025.115637","DOIUrl":"10.1016/j.cattod.2025.115637","url":null,"abstract":"<div><div>In this study, pyrolytic carbons derived from kraft lignin extracted from sugarcane bagasse and straw were systematically characterized to elucidate the relationship between their structure, composition, and electrocatalytic performance toward the oxygen reduction (ORR) and oxygen evolution (OER) reactions in alkaline media. Elemental analysis of lignin precursors revealed that straw lignin has a higher silicate content than bagasse lignin, which, together with pyrolysis temperature, strongly influences specific surface area, defect density, and degree of graphitization. Cyclic voltammetry shows that both carbons exhibit measurable ORR activity in 1 M KOH, whereas no significant OER activity was observed. The ORR proceeds mainly through a two-electron pathway producing peroxide intermediates for carbons obtained at 550 °C, while partial graphitization at 1000 °C promotes a mixed two–four-electron process associated with enhanced conductivity and reorganization of edge defects. Straw-derived carbons obtained at 1000 °C displayed higher cathodic currents but also greater instability at anodic potentials, indicating enhanced surface reactivity yet lower corrosion resistance. Overall, sugarcane-derived lignins are shown to be versatile carbon materials. Their tunable structural features, from highly defective amorphous networks to partially graphitized domains, enable application-specific optimization favoring ORR electrocatalysis in alkaline fuel cells and metal-air batteries.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"464 ","pages":"Article 115637"},"PeriodicalIF":5.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2025-11-10DOI: 10.1016/j.cattod.2025.115632
Jianxin Shi , Tengfei Jiang , Yanjuan Wu , Yanxin Mao , Zhibao Yin , Xuan Wen , Liang Wang , Hao Zhang , Hongman Sun , Linhua Song , Zhuang Zhuang
Although 13X zeolite is commonly used to remove oxygenates from Fischer-Tropsch oil, it still suffers from limited adsorption selectivity. In this study, glycine was used as a modifier to functionalize 13X zeolite by grafting polar groups, and applied for the removal of oxygenates from Fischer-Tropsch oil. The results indicate that the modified zeolite exhibits a high adsorption capacity for oxygenates. Specifically, the adsorption capacity for butanol, hexanal, and 2-hexanone increased by approximately 90 %, reaching 0.60 g·g−1, 0.36 g·g−1, and 0.35 g·g−1. The adsorption capacity for hexanol and octanol increased by approximately 50 %. The enhancement in adsorption capacity for carbonyl compounds and long-chain alcohols (such as hexanol, heptanol, and octanol) was particularly notable, with an average increase of about 80 %. Mechanistic studies revealed that the adsorption of oxygenates on the modified zeolite is primarily physical adsorption, involving hydrogen bonding interactions and van der Waals forces. The adsorption process can be divided into two stages: surface adsorption and pore diffusion, and is jointly influenced by factors such as zeolite pore size, adsorbate molecular size, and their interactions with the pore channels. This study provides a novel strategy for the removal of oxygenated compounds from Fischer-Tropsch oil.
{"title":"Tailoring the polarity of 13X zeolite with glycine for efficient capture of oxygenates from Fischer-Tropsch oil","authors":"Jianxin Shi , Tengfei Jiang , Yanjuan Wu , Yanxin Mao , Zhibao Yin , Xuan Wen , Liang Wang , Hao Zhang , Hongman Sun , Linhua Song , Zhuang Zhuang","doi":"10.1016/j.cattod.2025.115632","DOIUrl":"10.1016/j.cattod.2025.115632","url":null,"abstract":"<div><div>Although 13X zeolite is commonly used to remove oxygenates from Fischer-Tropsch oil, it still suffers from limited adsorption selectivity. In this study, glycine was used as a modifier to functionalize 13X zeolite by grafting polar groups, and applied for the removal of oxygenates from Fischer-Tropsch oil. The results indicate that the modified zeolite exhibits a high adsorption capacity for oxygenates. Specifically, the adsorption capacity for butanol, hexanal, and 2-hexanone increased by approximately 90 %, reaching 0.60 g·g<sup>−1</sup>, 0.36 g·g<sup>−1</sup>, and 0.35 g·g<sup>−1</sup>. The adsorption capacity for hexanol and octanol increased by approximately 50 %. The enhancement in adsorption capacity for carbonyl compounds and long-chain alcohols (such as hexanol, heptanol, and octanol) was particularly notable, with an average increase of about 80 %. Mechanistic studies revealed that the adsorption of oxygenates on the modified zeolite is primarily physical adsorption, involving hydrogen bonding interactions and van der Waals forces. The adsorption process can be divided into two stages: surface adsorption and pore diffusion, and is jointly influenced by factors such as zeolite pore size, adsorbate molecular size, and their interactions with the pore channels. This study provides a novel strategy for the removal of oxygenated compounds from Fischer-Tropsch oil.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"464 ","pages":"Article 115632"},"PeriodicalIF":5.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145578099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2025-12-11DOI: 10.1016/j.cattod.2025.115655
Shinta Novita Sari , Rizki Marcony Surya , Dewangga Oky Bagus Apriandanu , Chin Wei Lai , Yoki Yulizar
This study presents a novel, safe, and eco-friendly method for synthesizing Erbium Oxide (Er2O3) nanoparticles (NPs). We used Dendrocalamus asper leaf extract (EDA) as a natural precursor, confirming its rich content of secondary metabolites like alkaloids, flavonoids, tannins, saponins, and polyphenols. These compounds play vital roles: alkaloids act as a weak base for synthesis, while others serve as capping agents, ensuring stable nanoparticle formation. Characterization confirmed successful synthesis. Fourier-Transform Infrared Spectroscopy (FT-IR) spectroscopy showed a distinctive Er-O bond vibration at 565.43 cm−1. X-ray diffraction (XRD) analysis revealed a cubic crystalline structure, and UV-Vis Diffuse Reflectance Spectroscopy (DRS) indicated a broad bandgap of 5.2 eV. Scanning electron microscopy (SEM) images displayed spherical, aggregated NPs, and further confirmed their nanoscale size, averaging 21.83 nm. These results collectively affirm the excellent structural, optical, and morphological properties of the synthesized Er2O3 NPs. The photocatalytic performance was outstanding. Using malachite green as a model pollutant, the Er2O3 NPs achieved a 93.03 % degradation within 120 min under UV light. This degradation followed pseudo-first-order kinetics, with a rate constant (kobs) of 1.98 × 10−2 min−1. The optimized conditions, determined at an initial pH of 6.6, achieved a remarkable 93.03 % degradation. Scavenger experiments were performed to elucidate the mechanism, confirming that the superoxide radical (⋅O2−) is the dominant reactive species responsible for the degradation. Furthermore, the photocatalyst exhibited excellent operational stability, maintaining 85.15 % degradation efficiency even after four consecutive reuse cycles. This research highlights a simple, cost-effective, and efficient green synthesis method for producing highly effective Er2O3 NPs, offering a promising solution for environmental remediation.
{"title":"A breakthrough sustainable synthesis of Er2O3 nanoparticles using Dendrocalamus asper natural extract for effective photocatalytic response","authors":"Shinta Novita Sari , Rizki Marcony Surya , Dewangga Oky Bagus Apriandanu , Chin Wei Lai , Yoki Yulizar","doi":"10.1016/j.cattod.2025.115655","DOIUrl":"10.1016/j.cattod.2025.115655","url":null,"abstract":"<div><div>This study presents a novel, safe, and eco-friendly method for synthesizing Erbium Oxide (Er<sub>2</sub>O<sub>3</sub>) nanoparticles (NPs). We used <em>Dendrocalamus asper</em> leaf extract (EDA) as a natural precursor, confirming its rich content of secondary metabolites like alkaloids, flavonoids, tannins, saponins, and polyphenols. These compounds play vital roles: alkaloids act as a weak base for synthesis, while others serve as capping agents, ensuring stable nanoparticle formation. Characterization confirmed successful synthesis. Fourier-Transform Infrared Spectroscopy (FT-IR) spectroscopy showed a distinctive Er-O bond vibration at 565.43 cm<sup>−1</sup>. X-ray diffraction (XRD) analysis revealed a cubic crystalline structure, and UV-Vis Diffuse Reflectance Spectroscopy (DRS) indicated a broad bandgap of 5.2 eV. Scanning electron microscopy (SEM) images displayed spherical, aggregated NPs, and further confirmed their nanoscale size, averaging 21.83 nm. These results collectively affirm the excellent structural, optical, and morphological properties of the synthesized Er<sub>2</sub>O<sub>3</sub> NPs. The photocatalytic performance was outstanding. Using malachite green as a model pollutant, the Er<sub>2</sub>O<sub>3</sub> NPs achieved a 93.03 % degradation within 120 min under UV light. This degradation followed pseudo-first-order kinetics, with a rate constant (<em>k</em><sub>obs</sub>) of 1.98 × 10<sup>−2</sup> min<sup>−1</sup>. The optimized conditions, determined at an initial pH of 6.6, achieved a remarkable 93.03 % degradation. Scavenger experiments were performed to elucidate the mechanism, confirming that the superoxide radical (⋅O<sub>2</sub><sup>−</sup>) is the dominant reactive species responsible for the degradation. Furthermore, the photocatalyst exhibited excellent operational stability, maintaining 85.15 % degradation efficiency even after four consecutive reuse cycles. This research highlights a simple, cost-effective, and efficient green synthesis method for producing highly effective Er<sub>2</sub>O<sub>3</sub> NPs, offering a promising solution for environmental remediation.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"467 ","pages":"Article 115655"},"PeriodicalIF":5.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2025-11-11DOI: 10.1016/j.cattod.2025.115633
Zhaoxia Li , Wenjun Qin , Yong Zhang , Mianze Wei , Haotian Tang , Yuxue Mo , Zhiping Dai , Jiaoling Zhao , Haiqing Zhou , Xiaolin Wei
Alkaline water electrolysis is a promising strategy for hydrogen and oxygen production, but developing efficient non-precious metal electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) remains a significant challenge. To achieve low cost and efficient hydrogen evolution, we prepared the FeP-CoVO heterostructure using the morphological control and defect engineering and the urea oxidation is introduced to instead of OER at the anode. In 1 M KOH, the FeP-CoVO electrode requires overpotentials of 209 and 281 mV for HER and OER at current densities of 100 cm−2, respectively. Furthermore, after OER, the micro-morphology of the catalyst are restructured and there are the transition of cobalt oxidation state and iron oxyhydroxide species reconstructed. For the urea oxidation reaction (UOR), the FeP-CoVO also demonstrates high activity (with the overpotential 1.346 V at 50 cm−2) and high durability. For the application of a dual-electrode electrolyzer, the low cell voltages is 1.417 V at a current density of 10 cm-²for overall urea oxidation. For the development of water and urea electrolysis technologies, this work provides critical insights into designing efficient and low-cost non-precious metal catalysts.
碱水电解是一种很有前途的制氢和制氧方法，但开发出高效的非贵金属析氢反应（HER）和析氧反应（OER）电催化剂仍然是一个重大挑战。为了实现低成本高效的析氢，我们利用形态控制和缺陷工程技术制备了FeP-CoVO异质结构，并在阳极引入尿素氧化代替OER。在1 M KOH中，FeP-CoVO电极在电流密度为100 cm−2时，HER和OER分别需要209和281 mV的过电位。此外，经过OER后，催化剂的微观形态发生了重构，钴氧化态和铁氢氧化物形态发生了重构。对于尿素氧化反应（UOR）， FeP-CoVO也表现出高活性（在50 cm−2处过电位为1.346 V）和高耐久性。对于双电极电解槽的应用，低电池电压为1.417 V，电流密度为10 cm-²，用于尿素的整体氧化。对于水和尿素电解技术的发展，这项工作为设计高效和低成本的非贵金属催化剂提供了重要的见解。
{"title":"A high-performance Fe3P/Co3V2O8 heterostructure trifunctional electrocatalyst with exceptional durability for overall water splitting","authors":"Zhaoxia Li , Wenjun Qin , Yong Zhang , Mianze Wei , Haotian Tang , Yuxue Mo , Zhiping Dai , Jiaoling Zhao , Haiqing Zhou , Xiaolin Wei","doi":"10.1016/j.cattod.2025.115633","DOIUrl":"10.1016/j.cattod.2025.115633","url":null,"abstract":"<div><div>Alkaline water electrolysis is a promising strategy for hydrogen and oxygen production, but developing efficient non-precious metal electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) remains a significant challenge. To achieve low cost and efficient hydrogen evolution, we prepared the FeP-CoVO heterostructure using the morphological control and defect engineering and the urea oxidation is introduced to instead of OER at the anode. In 1 M KOH, the FeP-CoVO electrode requires overpotentials of 209 and 281 mV for HER and OER at current densities of 100 cm<sup>−2</sup>, respectively. Furthermore, after OER, the micro-morphology of the catalyst are restructured and there are the transition of cobalt oxidation state and iron oxyhydroxide species reconstructed. For the urea oxidation reaction (UOR), the FeP-CoVO also demonstrates high activity (with the overpotential 1.346 V at 50 cm<sup>−2</sup>) and high durability. For the application of a dual-electrode electrolyzer, the low cell voltages is 1.417 V at a current density of 10 cm<sup>-</sup>²for overall urea oxidation. For the development of water and urea electrolysis technologies, this work provides critical insights into designing efficient and low-cost non-precious metal catalysts.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"464 ","pages":"Article 115633"},"PeriodicalIF":5.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145500399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-28DOI: 10.1016/j.cattod.2026.115701
Eryk Fernandes , Catarina Ribeiro , Paweł Mazierski , Rui C. Martins , João Gomes
The use of visible light active materials in water decontamination is an interesting strategy to improve the feasibility of photocatalytic systems. Tungsten trioxide (WO3) presents typically low-cost and simple production, good stability, and activity in the visible spectrum, especially compared to other metal oxides, such as TiO2. Herein, two synthesis routes, sol-gel and hydrothermal, were explored, and key parameters (synthesis temperature and time, precursor ratio, pH, and calcination temperature) were varied to better understand their effect on the catalyst’s activity in the photocatalytic removal of a mixture of methyl-, ethyl-, and propylparabens under natural sunlight. Hydrothermal synthesis led to materials with better activity, achieving removals of 36.5 – 41.2 %, after 120 min under natural sunlight, using a catalyst synthesized at 150 ºC, pH of 0.5, during 24 h, and calcined at 500 ºC. The sol-gel method resulted in materials with an overall higher surface area, up to 81.9 m2 g−1, and synthesized in milder conditions, although the best catalyst produced achieved only up to 23.9 – 26.3 % parabens removal, synthesized with a 8:6 Na2WO4·2 H2O:C6H8O7 ratio, for 24 h at 25 ºC, and calcined at 500 ºC. The higher crystallinity degree obtained through the hydrothermal route may play a more relevant role in the final contaminants’ abatement. Besides, the good photochemical characteristics of WO3, the synthesis method and its conditions have a crucial role in photocatalytic activity.
{"title":"WO3-based solar photocatalysis for parabens removal: A study of synthesis methodology","authors":"Eryk Fernandes , Catarina Ribeiro , Paweł Mazierski , Rui C. Martins , João Gomes","doi":"10.1016/j.cattod.2026.115701","DOIUrl":"10.1016/j.cattod.2026.115701","url":null,"abstract":"<div><div>The use of visible light active materials in water decontamination is an interesting strategy to improve the feasibility of photocatalytic systems. Tungsten trioxide (WO<sub>3</sub>) presents typically low-cost and simple production, good stability, and activity in the visible spectrum, especially compared to other metal oxides, such as TiO<sub>2</sub>. Herein, two synthesis routes, sol-gel and hydrothermal, were explored, and key parameters (synthesis temperature and time, precursor ratio, pH, and calcination temperature) were varied to better understand their effect on the catalyst’s activity in the photocatalytic removal of a mixture of methyl-, ethyl-, and propylparabens under natural sunlight. Hydrothermal synthesis led to materials with better activity, achieving removals of 36.5 – 41.2 %, after 120 min under natural sunlight, using a catalyst synthesized at 150 ºC, pH of 0.5, during 24 h, and calcined at 500 ºC. The sol-gel method resulted in materials with an overall higher surface area, up to 81.9 m<sup>2</sup> g<sup>−1</sup>, and synthesized in milder conditions, although the best catalyst produced achieved only up to 23.9 – 26.3 % parabens removal, synthesized with a 8:6 Na<sub>2</sub>WO<sub>4</sub>·2 H<sub>2</sub>O:C<sub>6</sub>H<sub>8</sub>O<sub>7</sub> ratio, for 24 h at 25 ºC, and calcined at 500 ºC. The higher crystallinity degree obtained through the hydrothermal route may play a more relevant role in the final contaminants’ abatement. Besides, the good photochemical characteristics of WO<sub>3</sub>, the synthesis method and its conditions have a crucial role in photocatalytic activity.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"467 ","pages":"Article 115701"},"PeriodicalIF":5.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, 1 mL of 0.1 M of peroxymonosulfate (PMS) was activated using 0.2 g of MnFe2O4, NiFe2O4 and CoFe2O4 in the presence of light. The catalysts were prepared using hydrothermal method and characterised with various spectroscopic and microscopic techniques. The catalysts were used for degradation of 5 mL of 20 mg/L of methylene blue and crystal violet dyes in wastewater by photocatalytic activation of PMS. CoFe2O4 showed higher activity with 92% and 100% efficiencies for methylene blue and crystal violet, respectively after 120 min. The reactive oxygen species (ROS) studies revealed that hydroxyl radicals (●OH) were dominant species in photocatalytic degradation process, whereas sulfate radicals (SO4●-) were dominant species in PMS and photocatalytic PMS activation processes. The results showed that the synthesized catalysts are potential prospects for PMS activation for removal of organic pollutants in wastewater.
本研究采用0.2 g MnFe2O4、NiFe2O4和CoFe2O4在光照下活化1 mL的0.1 M过氧单硫酸根（PMS）。采用水热法制备了催化剂，并用各种光谱和显微技术对催化剂进行了表征。采用PMS光催化活化法降解废水中20 mg/L的亚甲基蓝和结晶紫染料5 mL。在120 min后，CoFe2O4对亚甲基蓝和结晶紫的效率分别为92%和100%。活性氧（ROS）研究表明，羟基自由基（●OH）在光催化降解过程中占主导地位，而硫酸盐自由基（SO4●-）在PMS和光催化PMS活化过程中占主导地位。结果表明，合成的催化剂在PMS活化去除废水中的有机污染物方面具有潜在的应用前景。
{"title":"Photocatalytic activation of peroxymonosulfate using spinel MnFe2O4, NiFe2O4 and CoFe2O4 catalysts for degradation of organic pollutants in wastewater","authors":"Siphumelele Thandokwazi Mkhondwane , Yogendra Kumar , Vinod , Viswanadha Srirama Rajasekhar Pullabhotla","doi":"10.1016/j.cattod.2026.115695","DOIUrl":"10.1016/j.cattod.2026.115695","url":null,"abstract":"<div><div>In this study, 1 mL of 0.1 M of peroxymonosulfate (PMS) was activated using 0.2 g of MnFe<sub>2</sub>O<sub>4</sub>, NiFe<sub>2</sub>O<sub>4</sub> and CoFe<sub>2</sub>O<sub>4</sub> in the presence of light. The catalysts were prepared using hydrothermal method and characterised with various spectroscopic and microscopic techniques. The catalysts were used for degradation of 5 mL of 20 mg/L of methylene blue and crystal violet dyes in wastewater by photocatalytic activation of PMS. CoFe<sub>2</sub>O<sub>4</sub> showed higher activity with 92% and 100% efficiencies for methylene blue and crystal violet, respectively after 120 min. The reactive oxygen species (ROS) studies revealed that hydroxyl radicals (<sup>●</sup>OH) were dominant species in photocatalytic degradation process, whereas sulfate radicals (SO<sub>4</sub><sup>●-</sup>) were dominant species in PMS and photocatalytic PMS activation processes. The results showed that the synthesized catalysts are potential prospects for PMS activation for removal of organic pollutants in wastewater.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"467 ","pages":"Article 115695"},"PeriodicalIF":5.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-03-15Epub Date: 2026-01-08DOI: 10.1016/j.cattod.2026.115682
Yang Li , Xiaoyi Guo , Yuanyuan Min , Haoyu Sun , Yingying Wang , Yanyun Ma , Yiqun Zheng , Hongwen Huang
The electrochemical CO₂ reduction reaction (CO₂RR) to multi-carbon (C₂₊) products like ethylene is promising for sustainable chemical production but is hindered by the sluggish kinetics of C–C coupling. Here, we report the design of in-plane Cu-Ag heterostructured holey nanoplates that efficiently overcome this limitation. This unique architecture, synthesized via a controlled etching/regrowth process, creates well-defined Cu and Ag phases within a single nanoplate, providing abundant active sites and enhanced mass transport. The optimized catalyst achieves a remarkable Faradaic efficiency of 53.6 % for ethylene with a high partial current density of 222.4 mA·cm⁻² at −0.9 V vs. RHE, significantly outperforming pure Cu. Density Functional Theory (DFT) calculations reveal that the Ag domains optimize the binding energies of key *CO intermediates, thereby lowering the energetic barrier for the critical C–C coupling step. This work highlights the synergistic potential of in-plane heterostructuring for designing advanced electrocatalysts.
{"title":"In-plane Cu-Ag heterostructured holey nanoplates for efficient electroreduction of CO2 to ethylene","authors":"Yang Li , Xiaoyi Guo , Yuanyuan Min , Haoyu Sun , Yingying Wang , Yanyun Ma , Yiqun Zheng , Hongwen Huang","doi":"10.1016/j.cattod.2026.115682","DOIUrl":"10.1016/j.cattod.2026.115682","url":null,"abstract":"<div><div>The electrochemical CO₂ reduction reaction (CO₂RR) to multi-carbon (C₂₊) products like ethylene is promising for sustainable chemical production but is hindered by the sluggish kinetics of C–C coupling. Here, we report the design of in-plane Cu-Ag heterostructured holey nanoplates that efficiently overcome this limitation. This unique architecture, synthesized via a controlled etching/regrowth process, creates well-defined Cu and Ag phases within a single nanoplate, providing abundant active sites and enhanced mass transport. The optimized catalyst achieves a remarkable Faradaic efficiency of 53.6 % for ethylene with a high partial current density of 222.4 mA·cm⁻² at −0.9 V vs. RHE, significantly outperforming pure Cu. Density Functional Theory (DFT) calculations reveal that the Ag domains optimize the binding energies of key *CO intermediates, thereby lowering the energetic barrier for the critical C–C coupling step. This work highlights the synergistic potential of in-plane heterostructuring for designing advanced electrocatalysts.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"466 ","pages":"Article 115682"},"PeriodicalIF":5.3,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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