FUEL
·
2016
·
IF 3.611
Dongjing Liu,Weiguo Zhou,Jiang Wu
The high-temperature H 2 S removal was conducted over x La y Cu/ZSM-5 sorbents prepared via citric acid method. The sorbents showed good desulphurization performance, the maximal sulfur capacity of 2240.5 μmol S/g over 5La5Cu/ZSM-5 was achieved at 700 °C. The presence of H 2 obviously shortened the breakthrough time and reduced the sulfur capacity. However, the presence of CO had little influence on the desulphurization behavior. The sulfidation activity of La 2 O 3 can be significantly enhanced by introduction of Cu due to the intimate mixing of La 2 O 3 and CuO, the formation of La 2 CuO 4 compound.
研究领域:
材料科学
·
环境化学
·
能源工程
·
催化化学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 8
·2426-2437
·
IF 6.177
Xinxin Zhang,Jiajun Dai,Jiageng Ding,Kok Bing Tan,Guowu Zhan,Jiale Huang,Qingbiao Li
Direct epoxidation of propylene (DEP) to propylene oxide (PO) with molecular oxygen is a very desirable reaction but remains a challenge due to the absence of efficient catalysts with high selectivity. The catalytic performance for direct epoxidation of propylene is well related to surface adsorbed electrophilic oxygen species. Herein, we prepared a series of Mn-doped La2CuO4 perovskites (LaMnxCu1−xO3) with adjustable valence electronic structure as selective catalysts to explore the impacts of catalyst intrinsic electronic structure evolution on the activation of molecular oxygen. Therein, LaMn0.5Cu0.5O3 performed the best with a PO selectivity of 74.2% at 150 °C. The characterization results and DFT calculations revealed that the excellent catalytic performance of LaMn0.5Cu0.5O3 might be ascribed to the change of molecular oxygen activation sites: from oxygen vacancy active sites on La2CuO4 to Cu active sites on LaMn0.5Cu0.5O3. Meanwhile, there was a synergistic interaction between manganese and copper affecting the electron density on Cu sites and ultimately modulating the activated states of surface adsorbed oxygen species. In addition, we employed crystal band theory to associate the oxygen vacancy density with the Cu valence state. This is important for people to understand the bulk electronic structure evolution rules caused by transition metal doping and to design catalysts efficiently for oxygen-based chemical reactions.
研究领域:
催化化学
·
材料科学
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Panpan Gao,Yunyi He,Shihuan Lu,Mengfan He,Zhiqun Liu,Yang Deng,Zhiquan Liu,Ting Xu,Hangjun Zhang
The cyanobacterial blooms induced water safety problems have attracted tremendous concerns due to the adverse influences on aqueous ecosystem and human health. This study developed a novel perovskite-type catalyst for heterogeneous peroxymonosulfate (PMS) activation as an emergency measure to remove harmful algae. The results indicated that significant removal efficiency of Microcystis aeruginosa cells (97%) and chlorophyll-a (100%) was achieved within 20 min in La 2 CuO 4 /PMS system without significant release of dissolved organic carbon and metals in water. • OH, SO 4 •- , 1 O 2 and • O 2 - generated were all responsible for algae inactivation and subsequent algal organic matters removal. Moreover, the heterogeneous catalytic mechanism was proposed that La portion in La 2 CuO 4 favored the cells destabilization by increasing zeta potential of algae suspension, while variable Cu portion facilitated the electron transfer to improve the yields of • OH and SO 4 •- . This study demonstrates that the new catalytic PMS process promises viable and effective control of harmful algal bloom impacts in water treatment.
研究领域:
环境科学
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
Chinese Physics B
·
2023
·Vol. 32
·期 8
·088201
·
IF 1.7
Fuliang Guo,Jiaze Lu,Meihua Su,Yue Chen,Jieyun Zheng,Liang Yin,Hong Li
The structural transformations, oxygen releasing and side reactions with electrolytes on the surface are considered as the main causes of the performance degradation of Li-rich layered oxides (LROs) cathodes in Li-ion batteries. Thus, stabilizing the surfaces of LROs is the key to realize their practical application in high energy density Li-ion batteries. Surface coating is regarded as one of the most effective strategies for high voltage cathodes. The ideal coating materials should prevent cathodes from electrolyte corrosion and possess both electronic and Li-ionic conductivities simultaneously. However, commonly reported coating materials are unable to balance these functions well. Herein, a new type of coating material, La2CuO4 was introduced to mitigate the surface issues of LROs for the first time, due to its superb electronic conductivity (26–35 mS⋅cm−1) and lithium-ionic diffusion coefficient (10−12–10−13 cm2⋅s−1). After coating with the La2CuO4, the capacity retention of Li1.2Ni0.54Co0.13Mn0.13O2 cathode was increased to 85.9% (compared to 79.3% of uncoated cathode) after 150 cycles in the voltage range of 2.0–4.8 V. In addition, only negligible degradations on the deliverable capacity and rate capability were observed.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Zhiheng Gong,Wenye Zhong,Zuyun He,Chenghao Jia,Deng Zhou,Nian Zhang,Xiongwu Kang,Yan Chen
Electrochemical reduction of nitrate into ammonia (NO 3 - RR) has attracted great attentions because of the potential application for environmental remediation and energy storage. Despite many pioneering works on electrocatalysts development, the correlation between material properties and NO 3 - RR activity is still not fully understood. Herein, taking layered Ruddlesden-Popper type oxide La 2 CuO 4 as a model system, we demonstrate B-site cation doping as an effective approach for modulating NO 3 - RR activities. While Co dopant at Cu site strongly enhanced the NO 3 - RR activity and NH 3 selectivity, Zn and Ni dopants lead to slightly enhanced and suppressed NO 3 - RR performance, respectively. The distinct reaction kinetics of NO 3 - RR on La 2 Cu 0.8 M 0.2 O 4 with different dopants are further revealed by in-situ Fourier transform infrared spectroscopy measurement. Synchrotron-based X-ray absorption spectroscopy showed that B-site doping can effectively regulate metal-oxygen hybridization, leading to strongly tuned surface adsorption characteristics and NO 3 - RR activity. The results of this work can guide the design of highly active (electro)catalysts for environmental and energy devices.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Guopei Zhang,Cong Wang,Xiaoyang Zhang,Yong Dong,Zhaomin Li,Leteng Lin
A novel Cu 2 LaO 4 /ZSM-5 sorbent was synthesized using the sol–gel method, and the role of H 2 S in enhancing Hg⁰ removal was investigated through experimental and theoretical approaches. Mercury removal performance was evaluated in a fixed-bed reactor under simulated syngas conditions, revealing that H 2 S significantly promoted removal efficiency, achieving 95.6 % at 200 °C. In contrast, H 2 and CO inhibited Hg 0 removal by depleting surface oxygen species. The addition of H 2 S mitigated these effects, facilitating Hg 0 adsorption and oxidation via a Langmuir–Hinshelwood mechanism. Density functional theory (DFT) calculations confirmed strong chemisorption of Hg 0 and H 2 S on the Cu 2 LaO 4 surface, with adsorption energies of −123.71 kJ/mol and −168.98 kJ/mol, respectively. The reaction to form HgS had a manageable energy barrier of 25.80 kJ/mol and an exothermic enthalpy of −196.82 kJ/mol, with HgS formation as the rate-limiting step. This study highlights the effectiveness of Cu 2 LaO 4 /ZSM-5 for mercury capture and its potential application in industrial syngas purification.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Feng Tan,Zhiqiang Sun
Hydrogen production from methanol is a promising pathway for clean energy applications, particularly in hydrogen transportation, storage, and in situ supply. This study investigates the chemical looping oxidative steam reforming of methanol using lanthanum copper oxide as the catalytic oxygen carrier. The results indicate that the redox looping promotes the generation of hollow La 2 CuO 4 supported exsolved Cu. This material exhibits excellent redox properties and satisfactory catalytic activity. Specifically, the sol-gel synthesized lanthanum copper oxide achieves a hydrogen yield of 0.22 mmol min −1 at 240 °C under a steam/methanol mole ratio of 1.2 and a gas hourly space velocity of 4000 h −1 . The catalytic oxygen carrier possesses even promoted catalytic activity and outstanding long-term stability after 60th cycles, attributed to the in situ generation of highly dispersed Cu nanoparticles via redox looping on the lanthanum copper oxide substrate. This research demonstrates the potential of lanthanum copper oxide as a next-generation catalytic oxygen carrier, contributing to the advancement of sustainable hydrogen production technologies.
研究领域:
能源化学
·
催化化学
·
材料科学
·
氢能源技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Mengjia Li,Jiakun Wang,Zihao Qiu,Liang Li,Jianzhong Xu,Jinman Mao,Huimin Wang,Biao Wang,Feng Huang
Plasma activation improves the plasma-RWGS performance of La 2 CuO 4 . • Plasma activation reconstructs La 2 CuO 4 into a Cu + -enriched surface. • La-mediated electronic interactions and OVs stabilize surface Cu + species. • Cu + -enriched surface promotes coupled CO 2 and H 2 activation. While plasma catalysis enables CO 2 hydrogenation under mild conditions, catalyst activation still commonly relies on conventional high-temperature thermal pretreatments, which interrupt continuous operation and limit the practical integration of plasma catalysis with intermittent renewable energy systems. In this study, plasma activation and thermal activation were compared for the plasma-catalytic reverse water-gas shift (RWGS) reaction using La 2 CuO 4 as a precursor. Plasma-activated La 2 CuO 4 exhibited significantly enhanced CO 2 conversion compared with its thermally activated counterpart. Comprehensive structural and spectroscopic analyses, including Cu LMM Auger spectroscopy, Cu K-edge XANES, and XPS, revealed that mild plasma irradiation induced surface reconstruction, forming a Cu + -enriched and oxygen-defective surface while largely preserving the La 2 CuO 4 framework. La-involved electronic interactions and oxygen-vacancy-related reconstruction of the local Cu−O coordination environment jointly contributed to the formation and stabilization of Cu + species. CO 2 -TPD and WO 3 -assisted H 2 spillover experiments further suggested that the plasma-induced Cu + -enriched surface promoted more balanced CO 2 adsorption/activation and H 2 activation/migration, thereby contributing to efficient plasma-RWGS performance. This work offers a plasma-oriented route for in situ catalyst activation and surface-state regulation in plasma-catalytic CO 2 hydrogenation. Download: Download high-res image (183KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zhiyun Xu,Yuwen Chen,Qingshan Zhu,Yafei Liu,Xianwang Zhang,Guoquan Song,Armin Rezayan,Qianli Ma,Zongwu Zhang,Jianshen Wang,Dan Wu,Chunbao Xu,Yongsheng Zhang
La 2 CuO 4 decorated inverse Cu catalysts enable selective FFA hydrogenolysis. • 10La/Cu delivers a 72.8% yield of 1,2-pentanediol from furfuryl alcohol. • Cu + –O v –La 3+ sites enable η 2 -(O, O)-FFA dual-site adsorption. • Cu 0 and Cu + –O v –La 3+ sites synergistically promote FFA adsorption and C 5 O cleavage. • 10La/Cu maintains stable performance for 200 h in a continuous flow fix-bed reactor. Selective conversion of furanic compounds to alkyl diols via furan ring-opening hydrogenolysis is of great importance for biomass refining, but remains challenging due to the inherent inertness of C−O−C bonds. In this work, an inverse-phase Cu catalyst decorated with La 2 CuO 4 domains was developed for the ring-opening hydrogenolysis of furfuryl alcohol (FFA) to 1,2-pentanediol (1,2-PeD). The optimized 10La/Cu catalyst afforded a 72.8% yield of 1,2-PeD at 140 °C under 6 MPa H 2 , which represents one of the best catalytic performance among previously reported Cu-based catalysts. Extensive characterization revealed that the intimate interaction between La 2 CuO 4 and metallic Cu generated abundant interfacial sites. Upon reduction, hydrogen spillover from metallic Cu to adjacent La 2 CuO 4 promoted the formation of an oxygen-vacant La 2 CuO 4 phase that are enriched with Cu + −O v −La 3+ sites. EXAFS analysis indicated that the Cu + −O v −La 3+ sites possess a Cu−La spatial distance of 0.32 nm, which well matches the atomic distance of two oxygen atoms in FFA molecules. In-situ FTIR and model reactions suggested that the formation of an η 2 -(O, O)-FFA dual-adsorption configuration on Cu + −O v −La 3+ sites may facilitate the selective activation of C−O−C bonds. Meanwhile, the sterically less hindered C 5 −O bond of the activated furan ring is selectively hydrogenolyzed by metallic Cu sites to form 1,2-PeD. This study provides mechanistic insight into selective furan ring hydrogenolysis and offers a feasible non-noble-metal-based catalyst with promising potential for practical application for the conversion of FFA to 1,2-PeD. Download: Download high-res image (265KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wen-Jian Yang,Li-Hui Yang,Han-Jun Peng,Si-Hao Lv,Hafiz Muhammad Adeel Sharif,Wei Sun,Wei Li,Cao Yang,Hui Lin
Electroreduction removal of nitrate (NO 3 – -N) is considered as a promising approach to solve its adverse effects on environment and human health, where efficient and cheap catalysts are required. Perovskite-based catalysts showed a versatile catalytic ability for wide range of redox reactions, but seldom applied for NO 3 – -N reduction. Herein, four perovskite oxide cathodes, LaMO 3-δ (M = Fe, Co, Ni and Cu) were prepared and used for the reduction of NO 3 – -N. The Ruddlesden-Popper (RP) type La 2 CuO 4 exhibited the best NO 3 – -N catalytic activity among the four perovskite oxide cathodes, with a removal rate of 11.7 × 10 -3 min −1 . The high selectivity of NH 4 + -N (82.4 ± 2.2%) indicated that NH 4 + -N was the main final product for NO 3 – -N electroreduction at La 2 CuO 4 cathode, but 100% of N 2 selectivity could be obtained with addition of 1000 and 1500 mg/L Cl - as the electro-assisted chlorination process. The mechanism of NO 3 – -N electroreduction occurred by both electron- and H*-mediated pathway, and the oxygen vacancies and redox cycle of Cu(I)-Cu(II)-Cu(I) were proposed as the accommodation sties and direct electron sources for NO 3 – -N reduction. Generally, this study opens a novel avenue for the development of earth-abundant, cost-effective catalyst with effective NO 3 – -N electroreduction.
研究领域:
环境科学
·
催化
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Zhichao Chen,Wenchao Wang,Hongzhi Wang,Licheng Liu
Electrocatalytic carbon dioxide reduction reaction (CO 2 RR) to produce value-added methane (CH 4 ) represents a promising approach to achieve carbon recycling and addressing global energy challenges. However, this reaction is currently hindered by limitations in catalytic selectivity and efficiency. Herein, we present a strategy involving strontium (Sr) doping at the A-site of La 2 CuO 4 perovskite (denoted as Sr x -LCO) to regulate surface basicity, thereby significantly enhancing catalytic performance for CO 2 RR toward CH 4 formation. The optimized Sr 0.04 -LCO catalyst achieves a Faradaic efficiency of 68.8% for CH 4 at −1.1 V (vs. RHE), which is significantly higher than that of undoped La 2 CuO 4 (44.1%) and at the top level among public reports. The results indicate that successful Sr doping to the La-site promotes electron transfer through the La−O−Cu linkage, generating a local alkaline microenvironment around the Sr−O sites. This microenvironment enhances CO 2 chemisorption and provides abundant reactive protons (*H). Theoretical calculations further confirm that the localized alkaline region reduces the activation energy barriers for the rate-determining steps (*CO 2 → *COOH and *CO → *COH) and suppresses the competing hydrogen evolution reaction (HER), thereby selectively steering the reaction pathway toward CH 4 formation. This study elucidates the mechanistic role of surface microenvironment modulation in enhancing CO 2 reduction reaction (CO 2 RR) selectivity for lanthanide perovskite, offering new insights for the rational design of high-performance electrocatalysts.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）