APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xixi Zhao,Pengheng Li,Min Lin,Xing Zhu
A “hydroxyl-transition metal synergistic” strategy was developed to enhance Cu-Ce oxygen carriers for chemical looping preferential oxidation (CL-PROX). Among synthesized MCuCe (M = Mn, Fe, Co) samples, MnCuCe exhibited superior performance. Mn doping strengthened strong interfacial interactions via oxygen vacancy-mediated charge compensation, yielding the highest surface Cu + (77.44%), Ce 3+ (20.94%), and oxygen vacancies (35.30%). Consequently, MnCuCe achieved >99% CO conversion at 180 °C with <3% H 2 consumption, showing no deactivation after 30 cycles. In situ FTIR verified that Cu + serves as the pivotal active site within a Mars-van Krevelen (MvK) mechanism. DFT calculations confirmed that the synergistic construction of stable M−Cu + −O v −Ce 3+ sites results in the most negative CO adsorption energy (−3.00 eV). This study provides a novel paradigm for designing high-performance CL-PROX oxygen carriers.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Jiaxin Li,Zhizhi Xu,Huan Jiang,Tianhao Ai,Songshan Zhu,Jinqiang Zhang,Shimin Ma,Jichang Lu,Yongming Luo
Methanol steam reforming (MSR) is promising for low-temperature H 2 production, yet Cu-based catalysts often deactivate under steam due to oxidation and sintering. Herein we develop a sol-gel-derived CuTiCe catalyst through dual-interface engineering that achieves both high MSR activity (complete methanol conversion and >99% CO 2 selectivity at 250 °C, with a H 2 productivity of 298 mmol∙g −1 cat ∙h −1 ) and durability (110 h time on stream), which outperforms single CuCe and CuTi samples. Comprehensive characterizations confirm that Ti incorporation drives Cu/Ti co-doping into lattice interstitial sites within CeO 2 and forms abundant Cu-O-Ti and Ti-O-Ce interfaces, significantly strengthening electronic metal-support interactions. Mechanistic research reveals that this dual interfacial structure stabilizes Cu + against oxidation and sintering, while boosting the desorption of water-dissociated species and avoiding oxygen vacancy refilling by ∙OH. This study provides an approach for tailoring the catalytic performance of Cu-based catalysts by multicomponent doping and interface engineering, paving the way for efficient and stable H 2 production.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Chao-Ying Gao,Yang Li,Wenbo Wang,Chenyu Liu,Jinghai Liu,Yang Yang
Developing heterogeneous catalysts capable of activating inert CO 2 under mild conditions remains a central challenge in sustainable chemistry. Herein, we report the rational design of a robust bimetallic platform, MOF-253-0.5(Cu/Ag), constructed by post-synthetic incorporation of synergistic Cu(II) and Ag(I) sites within the 2,2′-bipyridine pockets of the MOF-253 framework. The catalyst exhibits high turnover frequencies (TOF) of 260 h −1 under ambient conditions, ranking among the highest reports. It also maintains robust stability over 5 cycles, achieving a cumulative turnover number (TON) of 999.2. Even under diluted CO 2 conditions mimicking industrial flue gas, its catalytical activity remains largely unaffected. 1 H NMR mechanistic analysis was used to monitor the reaction processes. Comparative experiments with monometallic and pristine MOF confirm the superior performance of the bimetallic system, attributed to Cu/Ag synergy that activates both the C≡C bond and CO 2 . Furthermore, comprehensive density functional theory (DFT) calculations provided clear insights into the energetics and elementary steps of the catalytic cycles. This work highlights the power of site-isolated bimetallic MOFs in CO 2 chemical fixation.
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Journal of Energy Chemistry
·
2026
·
IF 15.6
Zhenxuan Liu,Peng Chen,Qi Wu,Qingquan Zhou,Abudukayier Abulimiti,Lingjun Li,Tianxiang Ning,Lei Tan,Kangyu Zou
P2-type layered oxide cathode materials suffer from severe challenges for practical application in sodium-ion batteries (SIBs), such as irreversible detrimental phase transitions, sluggish Na + diffusion kinetics, and poor air stability. To address these issues, a dual-site synergistic doping strategy is rationally designed and implemented in this work, enabling the successful synthesis of the P2-Na 0.65 Ni 0.09 Fe 0.16 Mn 0.67 Cu 0.05 Zn 0.05 O 2 (NFMCZO) cathode material. Atom-level energy-dispersive X‑ray spectroscopy (EDS) mapping directly confirms the precise dual-site occupation of Cu/Zn. Specifically, Zn 2+ occupies the Na sites to form a “pillar effect” to stabilize the interlayer structure, prevent the intrusion of H 2 O and CO 2 , and hinder transition metal (TM) migration. Meanwhile, both Zn 2+ and Cu 2+ are doped into the TM layer, which strengthens the TM–O bonds, avoids cracks, and expands the Na + transport pathways. Ex-situ X-ray diffraction (XRD) results further demonstrate that the detrimental P2-O2 phase transition is effectively suppressed during repeated charge-discharge cycling. Benefiting from the synergistic doping effect, the NFMCZO cathode shows excellent electrochemical performance. It achieves a capacity retention of 75.16% after 200 cycles at 1 C, along with outstanding rate capability (78.36 mAh g −1 at 5 C) and remarkable air stability (almost no structural change after 30 days of exposure). This work provides feasible design insights into the development of SIBs with long cycling life and excellent air stability, which can be extended to the construction of more stable layered oxide compounds and further promote the enhancement of their electrochemical performances. Cu/Zn dual-site-specific synergistic doping stabilizes P2-type layered oxide cathodes, in which Zn acts as an interlayer pillar to expand the Na + transport pathway; meanwhile, both Cu and Zn strengthen TM–O bonds to inhibit phase transitions, thus enabling fast Na + diffusion, excellent cycling stability, and exceptional air stability. Download: Download high-res image (195KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yunian Chen,Zhufu Fu,Dewei Zhang,Zeyu Wu,Shanshan Gao,Boyu Han,Junyu Pan,Xi Gao,Shenghong Ju,Yuan Xue
Cu/ZnAl 2 O 4 is a promising alternative to conventional Cu/ZnO/Al 2 O 3 (CZA) catalysts because its higher structural stability suppresses sintering-induced deactivation. However, its performance remains limited by weak metal-support interaction (MSI). Here, Zr was incorporated into the ZnAl 2 O 4 support to regulate the interfacial electronic structure and create defect sites. The optimized catalyst, containing 6 wt% Zr in the support and 8 wt% Cu, achieved a methanol space-time yield of 310.61 g MeOH /kg cat /h at 260 °C, 38% higher than that of the Zr-free sample. It also showed much higher Cu-based activity and stability than CZA. Combined characterizations and DFT calculations reveal that Zr strengthens MSI, suppresses Cu sintering, increases surface oxygen vacancies, and enhances Cu + /Cu 0 synergy, thereby promoting the formate pathway and lowering the barrier of the rate-determining step, which leads to improved methanol synthesis performance.
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Tanzeel Riaz Ahmad,Xin Li,Ling Jiang,Jie Jin,Xiupei Yang,Fenglin Tang
Background Hydroquinone (HQ), a widely used industrial chemical, persists in the environment and poses significant health risks, including carcinogenicity, as classified by the WHO. Existing detection methods (e.g., HPLC, GC-MS) rely on sophisticated instruments and complex procedures, limiting their practicality. Colorimetric sensors based on nanozymes offer simplicity and rapidity but often suffer from poor selectivity because of interference from structural isomers (catechol and resorcinol). The development of a high-performance nanozyme with synergistic activity and selective HQ detection remains a critical challenge. Results A bimetallic nanozyme (Cu-MOF@CoNPs) was engineered via a “ship-in-a-bottle” strategy, which successfully confined cobalt nanoparticles (Co NPs) within a porous copper–organic framework (Cu-MOF) scaffold. Characterization (SEM, XRD, FTIR, and XPS) confirmed the successful integration of Co NPs into the Cu-MOF matrix, preserving structural integrity through a pillaring effect while enhancing active site exposure. The composite exhibited superior peroxidase-like activity, with Michaelis constants ( K m ) of 0.39 mM (TMB) and 0.18 mM (H 2 O 2 ), indicating higher substrate affinity than that of natural horseradish peroxidase (HRP). Catalysis was driven by synergistic Cu–Co electron transfer, generating holes (h + ) and superoxide radicals (•O 2 − ). A “signal-off” colorimetric sensor was constructed on the basis of the HQinduced reduction of oxidized TMB (oxTMB), achieving a linear range of 0.2–12 μM, a low detection limit of 65 nM, and high selectivity for HQ over structural isomers (catechol and resorcinol) due to steric confinement and favorable redox kinetics, as verified through expanded interference studies. Practical applicability was validated in tap water, lake water, soil extracts, and cosmetic samples, with recoveries of 94–110% and relative standard deviations <3.5%. Significance The Cu-MOF@CoNPs nanozyme-based sensor provides a cost-effective, portable platform for onsite HQ detection in environmental and consumer safety monitoring. Its high sensitivity, selectivity, and stability highlight the potential of hierarchical MOF-confined bimetallic nanozymes as robust tools for reliable phenolic pollutant analysis.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2026
·
IF 5.9
Qi-qi Jing,Zhi Huang,Yan-ying Liu,Qian Zhang
This work proposed a novel mechanism linking Cu(OH) 2 to MXene material, which promotes the development of 2D-dimensional material in TC degradation. • The optimized system enhances the efficiency by generating ·O 2 − and 1 O 2 , ·OH. ·O 2 − plays a significant role in TC degradation. • The catalyst maintain 87.94% activity over 4 times recycle, outperforming existing materials. • Performance of the strategy is friendly to environment, the metabolite is CO 2 and H 2 O. Ti 3 C 2 T x has emerged as a promising electrocatalyst for environmental remediation, yet its practical application is often limited by insufficient active site exposure and poor operational stability. In this study, we developed out-of-plane Cu-functionalized Ti 3 C 2 T x nanosheets (Ti 3 C 2 Tx@Cu) decorated with Cu(OH) 2 clusters of approximately 5-30 nm in size, which significantly enhance the electrocatalytic degradation of tetracycline hydrochloride (TC). Comprehensive theoretical and experimental analyses confirm that the spontaneously anchored Cu species not only improve electrical conductivity but also markedly boost catalytic activity. The optimized Ti 3 C 2 Tx@Cu catalyst achieves complete degradation of TC within 30 min, outperforming pristine Ti 3 C 2 T x. Mechanistic investigations reveal that the introduction of Cu promotes the predominant generation of superoxide radicals (·O 2 − ), shifting the degradation pathway from a combined effect of ·OH, ·O 2 − and 1 O 2 in the pure Ti 3 C 2 T x system to a ·O 2 − dominated process in the Ti 3 C 2 Tx@Cu system. This work provides an effective strategy for enhancing MXene-based electrocatalysts and underscores their potential in addressing antibiotic contamination, thereby contributing to public health and environmental sustainability.
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ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 34
·15242-15253
·
IF 7.6
Hong Zhe,Miao Lei,Xiong Chuanfang,Zhu Li,Li Na,Chen Kaiyuan,Shen Hongxia,Gao Xianlong,Zhu Zhirong
The reaction of toluene side-chain alkylation with methanol represents a potential route to reduce the energy consumption in large-scale styrene production. In this study, we design a dual zeolite-based Cu–Cs catalytic system that constructs a catalytic enhancement path to produce styrene by leveraging the distribution of Cu–Cs sites. The reaction results demonstrate that the catalyst in the stacking model of a dual bed manner (Cu/NaX-CsX-DB) exhibits higher toluene conversion (8.1%), methanol utilization efficiency (60.2%), and styrene selectivity (84.3%), accompanied by an extended catalytic stability (>100 h), than conventional Cu-modified CsX (Cu/CsX) and parent CsX catalysts. The excellent catalytic performance is realized on the basis of the triple functions of the optimal catalyst: (i) the introduction of Cu sites and the original Cs sites synergistically facilitates the dehydrogenation of methanol to formaldehyde, thereby improving the utilization of methanol; (ii) meanwhile, the introduced Cu species act as a new Lewis acid site, which modulate the surface Lewis acid-base pairs; (iii) the oriented component distribution in the Cu/NaX-CsX-DB catalyst greatly promotes the transfer of the HCOO* intermediate and provides a directional spatial pathway to improve the reaction efficiency of toluene and methanol to styrene.
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INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 34
·19989-19997
·
IF 4.6
Yang Yuanyuan,Wang Xinyue,Zhang Chun-yang,Jia Henglei
Alloyed nanoframes (NFs), featuring high metal atomic
utilization
efficiency and large specific surface areas, have shown great promise
for electrocatalysis. However, the rational design and precise synthesis
of structurally stable NF catalysts remain considerable challenges.
Herein, we report a template-guided strategy for constructing alloyed
Cu x Rh y NFs
via the selective etching of Cu atoms from the low-energy facets of
Cu nanocubes (NCs) using a Cl – /O 2 pair,
followed by the galvanic replacement of Cu atoms with Rh at the frame
edges and vertices. Notably, the Cu 24 Rh 76 NFs
deliver outstanding electrocatalytic performance toward the nitrite
reduction reaction (NO 2 RR), achieving an NH 3 Faradaic efficiency (FE) of 99.6% at 0 V (vs the reversible hydrogen
electrode (RHE)) and an NH 3 yield rate of 676.7 mmol h –1 g –1 at −0.4 V. Such remarkable
electrocatalytic performance for NH 3 production arises
from not only the unique three-dimensional (3D) ultrathin frame architecture
but also a tandem catalytic mechanism. During the NO 2 RR
process, Cu sites adsorb and activate NO 2 – to produce the *NO intermediate, while Rh sites generate *H species
that migrate to the *NO intermediates adsorbed on Cu sites, effectively
promoting the subsequent hydrogenation steps toward NH 3 generation.
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PubMed
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·Vol. 65
·期 34
·18223-18234
·
IF 3.9
Ji Xianxian,Lin Hui,Faraj Yousef,Xie Ruzhen
Electrochemical nitrate reduction to ammonia (NO 3 RR)
is a sustainable strategy that integrates environmental remediation
with ammonia resource recovery. Current NO 3 RR studies mainly
focus on high nitrate concentrations under idealized electrolyte conditions
to achieve high ammonia yields. Under realistic water conditions,
low NO 3 – concentrations, neutral media,
and competing side reactions often result in sluggish kinetics, low
removal efficiency, and undesirable nitrite accumulation. Herein,
we report a facile strategy for constructing an interface-tunable Cu/Cu 2 O@CoO-P heterojunction
through one-step regulation of the growth of CoO nanoneedles on copper
mesh by tuning the phosphorus concentration. Phosphorus incorporation
effectively modulates the electronic structure of the Co active sites
and tunes the heterojunction interface, thereby optimizing the generation
of adsorbed hydrogen (*H) and suppressing the hydrogen evolution reaction.
This enables a well-matched two-step tandem pathway, where Cu/Cu 2 O facilitates the conversion of NO 3 – to NO 2 – , and the P-modulated CoO sites
rapidly hydrogenate NO 2 – to NH 4 + , thus effectively preventing excessive NO 2 – accumulation. The optimized Cu/Cu 2 O@CoO-P achieves a high Faradaic efficiency
(FE) of 97.11% for NH 4 + - N and an ammonia yield
of 36.09 mg h –1 cm –2 at 10 mA
cm –2 under neutral-pH conditions, along with excellent
stability, retaining 98.45% of its performance after 20 cycles. Notably,
the catalyst demonstrates exceptional practical applicability for
ammonia recovery from real aquaculture tailwater in both batch mode
and continuous-flow mode. This work offers new insights into the design
of tunable heterojunction interfaces to achieve a well-matched and
efficient tandem catalytic process, enabling effective remediation
of low-concentration nitrate contamination and high ammonia recovery
in real wastewater environments.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124771
·
IF 7.5
Xiaoyang Zhang,Mengyuan Ding,Julio Romano Meneghini,Xungang Diao,Mingze Jia,Song Guo,Jinlei Guo,Juan Wang
Traditional photocatalytic alcohol reforming often suffers from uncontrolled deep oxidation, leading to undesirable greenhouse gas (CO 2 ) emissions and the loss of valuable carbon resources. To address this environmental and engineering bottleneck, a highly dispersed, sub-nanometer Cu + cluster/TiO 2 catalyst with engineered oxygen vacancies was constructed via a scalable, one-step molten-salt strategy. The highly polarized liquid flux provides a localized salt-thermal microenvironment that thermodynamically stabilizes the highly active Cu + state and effectively prevents cluster agglomeration under ambient air calcination. The optimized catalyst delivers a promising photocatalytic hydrogen evolution rate of 181.89 mmol g-1 over 4 h, achieving an apparent quantum yield (AQY) of 27.1% at 365 nm. Notably, this non-noble-metal system outperforms highly active noble-metal benchmarks under identical conditions. Crucially, detailed characterizations indicate that the highly dispersed Cu + clusters significantly modulate surface adsorption configurations rather than relying on macroscopic plasmonic effects. This robust sub-nanoscale interfacial coupling selectively drives targeted dehydrogenation and dehydration pathways. Consequently, the catalyst suppresses parasitic C-C bond cleavage, keeping CO and CO 2 emissions below the detection limit of GC-TCD while maximizing active hydrogen extraction and co-producing value-added chemicals (e.g., highly selective production of formaldehyde from methanol, alongside valuable C 2 products from ethanol). This work presents a sustainable, easily scalable engineering paradigm for waste alcohol valorization, effectively bridging green hydrogen production with carbon-neutral chemical synthesis.
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ENERGY & FUELS
·
2026
·Vol. 40
·期 33
·18068-18080
·
IF 6
Fu Zong-Pin,Zhao Yun-Peng,Wu Yu-Fa,Qiu Le-Le,Liu Fang-Jing,Zhong Mei,Liang Jing,Cao Jing-Pei
Efficient depolymerization of lignite remains challenging
owing
to both its structural complexity and the high stability of oxygen-containing
bridge linkages. Herein, low-temperature pyrolysis and oxidative pretreatments
were employed to regulate oxygen-containing structures and enhance
the hydrogenolysis reactivity of Zhaotong lignite (ZT). These pretreatments
promoted the structural evolution of lignite, activated oxygen-containing
bridge structures, and suppressed the recondensation of reactive intermediates,
thereby facilitating subsequent depolymerization reactions. A CuCoOx
catalyst capable of dynamic in situ reconstruction was introduced
for catalytic hydrogenolysis. Under reaction conditions, partial reduction
of CuCoOx generated reconstructed Cu 0 -CoOx interfacial
active sites, where the synergistic interaction between metallic Cu
and defect-rich CoOx promoted H 2 activation and selective
C–O bond cleavage. Density functional theory (DFT) calculations
further revealed that interfacial electron redistribution at the Cu
cluster/Vo-Co 3 O 4 (311) interface facilitated
H 2 activation and stabilized reactive hydrogen species.
These findings provide new mechanistic insights into pretreatment-regulated
and interface-controlled hydrogenolysis pathways for the efficient
valorization of low-rank coal.
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