SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Xiaoyun Lin,Zhenmao Zhu,Chengfei Zhao,Shaoguang Li,Qicai Liu,Ailin Liu,Liqing Lin,Xinhua Lin
In this study, we developed a simple, sensitive and label-free colorimetric sensor for trypsin and its inhibitor using oxidase mimicking activity of protamine-stabilized platinum nanoparticles units (Pro-PtNPs units). Protamine is designed to stabilize PtNPs and served as the substrate of trypsin hydrolysis. The results show that protamine combines several PtNPs together to form active units, which have stronger oxidase mimicking activity than other PtNPs. In addition, the Michaelis constant of the Pro-PtNPs units is smaller than negatively charged citrate capped PtNPs, suggesting that the positively charged Pro-PtNPs units have better affinity with 3,3′,5,5′-tetramethylbenzidine (TMB), which is inconsistent with previous reports. The protamine stabilizer could be hydrolyzed in the presence of trypsin, and the Pro-PtNPs units would be decomposed and aggregated, resulting in a decrease of catalytic activity of Pro-PtNPs units. The color of the solution would be reduced according to the decrease of catalytic activity, so the catalytic activity is linearly related to UV absorbance. The linear range of trypsin detected by this new method is 0.06 μg/mL˜0.6 μg/mL, and the detection limit down to 0.03 μg/mL. Pro-PtNPs units have been successfully applied to the determination of serum trypsin and screening of inhibitors.
研究领域:
生物化学
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纳米医学
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DOI
高影响因子
Journal of Materials Chemistry A
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2012
·Vol. 1
·期 6
·2278-2285
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IF 0
Jun Zhou,Ming Chen,Guowang Diao
An amphiphilic amino resorcinarene (T) was modified onto the surface of graphene oxide (GO) through covalent bond forces and non-covalent bond forces to prepare GO–T. The water-soluble graphene–T (GN–T) composite was prepared by the reduction of GO–T. Then, pre-prepared platinum nanoparticles (PtNPs) and different sized gold nanoparticles (AuNPs) could self-assemble onto the surface of GN–T through the plentiful amido groups of T to obtain GN–T–AuNPs and GN–T–PtNPs hybrid materials. It was verified that the AuNPs and PtNPs could be uniformly scattered on GN and the amount of AuNPs and PtNPs modified on GN could be adjusted by changing the weight ratio of T/GO. GN-T-PtNPs and GN-T-AuNPs composites showed the characteristics of being dispersible, stable and recyclable in water. Electrochemical results obviously revealed that GN–T–AuNPs and GN–T–PtNPs composites exhibited outstanding electrocatalytic properties.
研究领域:
纳米材料化学
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电分析化学
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功能复合材料
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表面自组装
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电催化
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DOI
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Neng Li,Naigen Zhou,Ke Xiao,Xuxu Wang,Zhen Liu
Ru-vacancy-rich NiRu v -LDH is constructed on biomass-derived porous wood scaffolds. • Vacancy engineering enables electronic modulation and enhanced mass transport • The PEM electrolyzer operates at 1.75 V and 1 A cm −2 for over 2000 h • Ni-doped RuO 2 reconstruction and DFT reveal the activity-stability origin. Proton exchange membrane (PEM) water electrolysis is vital for green hydrogen production, but its acidic oxygen evolution reaction (OER) is hindered by sluggish kinetics and catalyst delamination. To address this, a self-supported electrode was fabricated by anchoring Ru-deficient layered double hydroxides on a natural camphorwood substrate (NiRu v -LDH). Camphorwood's 3D hierarchical porous architecture provides structural integrity and hydrophilic microchannels that accelerate mass transport and gas release, eliminating polymeric binders. A chemical etching strategy successfully introduced atomic-scale Ru vacancies, reconfiguring the local electronic structure, and lowering the OER overpotential to 215 mV at 10 mA cm −2 . In a PEM electrolyzer, the catalyst required only 1.75 V at 1.0 A cm −2 and demonstrated over 2000 h of industrial-grade stability. Crucially, during the PEM water splitting process, the NiRu v -LDH catalyst undergoes in-situ anodic oxidation to transform into Ni-RuO 2 , which exhibits exceptional stability in the acidic operating environment. Techno-economic analysis confirms its exceptional commercial viability, achieving a hydrogen production cost of ~US$ 1.1 per kg.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Nan Ma,Xingzhe Guo,Wei Liu,Weiwei Xu,Zihao Xing,Jinfa Chang
A phthalocyanine heterojunction oxygen-reduction catalyst formed by axial coordination of oxygen atoms from terminal groups was constructed via a solid-state coupling strategy. • FePPc-PTA exhibits excellent alkaline ORR activity with a half-wave potential of 0.907 V and Zn-air batteries performance with a specific capacity of 817.28 mAh g −1 and stable cycling for over 500 h. • Axial coordination breaks the original planar Fe N 4 symmetry and modulates the local electronic environment of the Fe sites thereby accelerating ORR kinetics. Iron polyphthalocyanine (FePPc) is a structurally well-defined Fe N 4 molecular catalyst for the oxygen reduction reaction (ORR). However, its planar and relatively symmetric Fe N 4 configuration restricts axial O 2 interaction and limits interfacial electron transfer. Herein, a phosphotungstic acid (PTA, H 3 PW 12 O 40 )-coupled iron polyphthalocyanine catalyst, denoted FePPc-PTA, is constructed via a solid-state grinding-assisted coupling strategy. The Keggin-type PTA is incorporated into the conjugated FePPc framework, forming axial Fe O coordination between PTA-derived oxygen species and Fe centers. X-ray photoelectron spectroscopy (XPS) and Fe K-edge X-ray absorption spectroscopy (XAS) reveal a Fe O axial coordination environment and a decreased electron density around the Fe center after PTA incorporation. This axial coordination breaks the original planar Fe N 4 symmetry, regulates the local electronic environment of the Fe sites and promotes interfacial charge redistribution, thereby strengthening the axial interaction between Fe centers and oxygen species and accelerating ORR kinetics. Consequently, FePPc-PTA exhibits excellent alkaline ORR activity, with a half-wave potential of 0.907 ± 0.002 V versus the reversible hydrogen electrode (RHE), a kinetic current density of 22.37 ± 0.10 mA cm −2 , a Tafel slope of 41.92 mV dec −1 and a turnover frequency of 4.40 s −1 at 0.8 V. When employed in rechargeable Zn-air batteries, the FePPc-PTA + ruthenium dioxide (RuO 2 ) air cathode delivers a peak power density of 170 mW cm −2 , a specific capacity of 817.28 mAh g −1 and stable cycling for over 500 h. this work demonstrates that polyoxometalate coupling is an effective strategy for regulating Fe N 4 active sites in metal polyphthalocyanines toward high-performance non-precious ORR catalysis Download: Download high-res image (121KB) Download: Download full-size image
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高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Wenfeng Lang,Wenlei Zhang,Tianyang Li,Jichuang Wu,Young Dok Kim,Qiaoyun Liu,Meng Zhang,Zhikun Peng,Rui Wang,Zhongyi Liu,Shuang-Quan Zang
The dynamic nature of single-atom catalysts, manifested as transient coordination fluctuations during individual molecular turnovers, has provided crucial mechanistic insights. However, the practical exploitation of such molecular-level dynamics remains fundamentally challenging due to their experimental elusiveness and poor controllability. Here, we report a paradigm shift from these stochastic fluctuations to programmable coordination switching, enabled by the operando-reversible reconstruction of single-atom Cu sites in a Pt/bpy-UiO-CuX 2 model catalyst. Triggered by a reductive environment during hydrogenation, a metastable N 2 -Cu-H configuration is generated under reducing conditions and remains the dominant Cu state during catalysis, before reversibly converting to an oxidized Cu-(OH) 2 form after depletion of reducing species and air exposure. Meanwhile, the coordination anions can be reprogrammed through external acid/anion environments, enabling interconversion among Cl − , OH − , and sulfate-containing Cu coordination states. Multimodal operando spectroscopy combined with theoretical calculations demonstrates that the N 2 -Cu-H intermediate modulates the electronic state of the active Pt center, thereby boosting phenylacetylene-to-styrene selectivity by simultaneously lowering styrene desorption energy by 0.68 eV while raising the barrier for styrene hydrogenation by 0.66 eV. This work elevates dynamic single-atom sites from stochastic structural fluctuations to programmable coordination switching, establishing a new paradigm for enzyme-mimetic catalysts with adaptive responsiveness to redox and acid–base environments.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Junhao Lu,Jun Wang,Yaojin Duan,Lan Ma,Dongfeng Zhai,Ihar Razanau,Kunming Pan,Yaru Li,Saifei Pan
Designing transition metal phosphides (TMPs) with remarkable performance and high stability for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) plays a significant role in the commercial application of water splitting. Bimetallic phosphide (NiCoP) exhibits favorable electrocatalytic activity; however, it still suffers from intrinsic limitations such as insufficient intrinsic activity, inferior electrical conductivity, and a tendency toward particle agglomeration. To address these issues, a CeO 2 modified NiCoP particle catalyst (referred to as CeO 2 -NiCoP/Ti 3 C 2 T x ) loaded on a few layers of Ti 3 C 2 Tx MXene was synthesized using an HCl/LiF etching and hydrothermal phosphorization method. The CeO 2 -NiCoP/Ti 3 C 2 T x catalyst exhibits significantly lower overpotentials (287 mV for OER and 147 mV for HER) to achieve a current density of 10 mA cm −2 . Moreover, the catalyst demonstrates outstanding durability, with 93.6% and 84.6% retention of its activity after 27 h of OER and 25 h of HER, respectively.The favorable performance of CeO 2 -NiCoP/Ti 3 C 2 T x in HER and OER can be attributed to several advantages. Few-layer Ti 3 C 2 T x enhances the electrical conductivity of the material, and its large specific surface area prevents particle agglomeration, thus improving the material stability.The -O/-OH functional groups on the surface of Ti 3 C 2 T x endow the material with strong hydrophilicity, which facilitates the full contact between active sites and the electrolyte and accelerates the mass transfer and charge transfer kinetics. CeO 2 effectively optimizes the adsorption energy of NiCoP toward hydrogen intermediates by regulating the microelectronic structure of NiCoP, thereby boosting the HER kinetics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Jia-Yi Chen,Yu-Shu Han,Qing He,Yu-Qiong Huang,Ju-Hua Li,Zhong-Li Wang
A strong interaction interface is constructed between TiO 2 particles and NiMo nanorods. • NiMo alloy electrodes with and without TiO 2 exhibit different reconstruction processes as both anode and cathode. • TiO 2 tailored NiMo electrodes exhibits excellent activity and stability for over 10,000 h at 500 mA cm −2 in 30% KOH at 80 °C. • The reaction mechanism was systematically studied by in situ Raman spectroscopy and 18 O isotope labeling. The reconstruction process of electrocatalysts plays an important role in the electrocatalytic process, and how to tailor the reconstruction is crucial for the performance and remains greatly challenging. Herein, we demonstrate that TiO 2 can tailor the reconstruction process of NiMo alloy for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) reactions. NiMoO 4 microrods arrays adsorbed with titanium butoxide on its surface are converted into TiO 2 modified NiMo alloy under high-temperature reduction. NiMo alloy electrodes with and without TiO 2 exhibit different reconstruction processes as both anode and cathode under simulated industrial conditions (30% KOH, 80 °C). With TiO 2 , the cathode and anode are reconstructed into ultrafine Ni(OH) 2 nanosheets coated on NiMo alloy and ultrafine NiOOH nanosheets, respectively. Without TiO 2 , NiMo alloy electrodes are reconstructed into large-sized Ni(OH) 2 or NiOOH nanosheets on the cathode or anode. The TiO 2 tailored NiMo electrodes exhibit low overpotentials of 29 mV for HER and 213 mV for OER at a current density of 10 mA cm −2 in 1 M KOH at 25 °C. Moreover, an electrolytic cell assembled by them as both cathode and anode electrodes can maintain 1.8 V at a current density 500 mA cm −2 with stable running for over 10,000 h in 30% KOH at 80 °C. Mechanism studies indicate that TiO 3 2− ions intercalate into the interlayer of Ni(OH) 2 , inhibiting the dissolution of Mo and controlling the size of Ni(OH) 2 , and the bond lengths of Ni O and Ni Mo bonds are shortened, which effectively enhance catalytic activity and stability. Download: Download high-res image (60KB) Download: Download full-size image
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Lan Zhang,Wanran Huang,Xi Peng,Peixin Jiang,Jianshan Ye,Minglei Yan,Zhiwei Lu
The high efficiency, low cost, and rapid preparation of non-noble metal oxygen reduction reaction (ORR) electrocatalysts are of great significance for the large-scale application of energy conversion equipment. Herein, PdNi alloy nanoparticles dispersed within the multiwalled carbon nanotubes (MWCNTs) composite (PdNi-PVP/MWCNTs) were synthesized via an in situ self-assembly strategy, in which polyvinylpyrrolidone (PVP) serves as an N and C source, and MWCNTs act as conducting supports to enhance structural integrity and electron transport. Notably, the synthesis relies solely on low-temperature oil-bath stirring, enabling rapid batch production without the need for high-temperature calcination-a distinctly green and scalable approach. In this system, PVP acts as a capping agent that facilitates the uniform anchoring of PdNi alloy nanoparticles on MWCNTs, effectively suppressing particle aggregation, thereby increasing the surface roughness and specific surface area to expose more active sites. Impressively, benefiting from the unique structure, high crosslinking, and high conductivity that minimize catalyst separation and aggregation, this new type of electrocatalyst exhibited an impressive ORR onset potential of 0.97 V, half-wave potential of 0.83 V, larger current density of 4.3 mA∙cm −2 , and existing good corrosion resistance to drive a relatively stable performance, which are superior to commercial Pt/C in alkaline media. This study demonstrates the successful design of an environmentally benign and cost-effective ORR electrocatalyst, highlighting its promising potential for practical applications in energy conversion technologies.
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高影响因子
Journal of Energy Storage
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2026
·
IF 10.7
Ning Gao,Ben Hu,Yuqi Chen,Junhao Zhang,Yuanjun Liu,Xiangjun Zheng,Qianqian Fan,Ying Zhang,Qinghong Kong,Xingmei Guo
Sluggish oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) reaction kinetics restrict the application of zinc-air batteries, making the exploration of high-performance bifunctional electrocatalysts imperative. Here, a multiple synergistic strategy is proposed to fabricate Co//NiFe@CNFs composite with spatially separated dual-active-sites, with NiFe nanoparticles encapsulated inside carbon fibers and Co nanoparticles anchored on their outer surfaces. The catalyst exhibits excellent bifunctional catalytic activity with a high ORR half-wave potential of 0.865 V (vs. RHE) and a low OER overpotential of 310 mV at 10 mA cm −2 . Meanwhile, the Co//NiFe@CNFs catalyst shows excellent durability with a current retention rate of 95.41% after 35,000 s and methanol tolerance. The assembled zinc-air battery achieves a peak power density of 145.6 mW cm −2 at 231.9 mA cm −2 and a specific capacity of 815 mAh g Zn −1 at 10 mA cm −2 , and excellent cycling stability. The excellent electrocatalytic performance originates from multifactor synergy that the porous fibrous structure accelerates mass transport, Co and NiFe nanoparticles provide abundant active sites, and their spatial separation improves structural stability while eliminating cross-interference between active centers for different catalytic pathways.
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高影响因子
ADVANCED MATERIALS
·
2026
·
IF 26.8
Kangwang Wang,Jie Zhan,Jun Liu,Zaichen Xiang,Wanyi Zhang,Lingyong Zeng,Kai Yan,Yan Sun,Huixia Luo
The photochemical CO 2 reduction reaction (CRR) represents a zero-carbon pathway for converting CO 2 into value-added chemicals, yet its industrial implementation has been constrained by low selectivity and product diversity. Dirac nodal arc semimetals characterized by ultrahigh carrier mobility (>25 000 cm 2 ·V −1 ·s −1 ) offer a promising platform to search for efficient catalysts for CO 2 conversion. Herein, we demonstrate that strategic Pt incorporation into PdSn 4 optimizes the electronic structure and carrier dynamics of this Dirac semimetal. Experimental and theoretical analyses reveal that the resulting Pd─Sn─Pt local electronic structure redistributes charge density around Pd and Pt atoms, which facilitates C─C coupling via *OC─COH and *OC─CHOH intermediates and enhances carrier mobility by 40% versus the pristine PdSn 4 single crystal. The optimized Pd 0.4 Pt 0.6 Sn 4 single crystal achieves C 2 H 4 i) formation rate of 328 µmol∙g −1 ∙h −1 ; ii) product selectivity of 73.1%; iii) electron-based selectivity of 89%. This work establishes electronic-structure-tunable Dirac semimetals as a new paradigm for multi-carbon photochemical CO 2 reduction, providing a design strategy for next-generation photocatalysts.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2026
·
IF 19.9
Namuersaihan Namuersaihan,Zhiqiang Zhao,Oliver J. Conquest,Ying Shu,Haoyue Sun,Chunjing Su,Qi Cheng,Aloysius Soon,Catherine Stampfl,Jun Huang
The hydrogen evolution reaction (HER) in alkaline media is a promising strategy for sustainable hydrogen production, but the exploration of efficient and durable HER electrocatalysts is often hindered by the empirical and time-consuming nature of traditional synthesis. Herein, a machine learning (ML)–driven strategy combining Bayesian optimization is introduced to achieve the rational design of Ni 3 S 4 /Ni 3 Mo heterostructures for alkaline HER. By coupling predictive modeling with experimental feedback, this approach efficiently navigated a complex synthesis space and identified conditions yielding a structurally and electronically optimized catalyst. The optimized Ni 3 S 4 /Ni 3 Mo exhibits a vibrant morphological evolution—from compact buds to blooming petal-like structures—enabling enriched active sites and accelerated mass transport. Guided by Bayesian optimization, the optimized Ni 3 S 4 /Ni 3 Mo achieves a 10.5-fold enhancement in C dl and delivers an exceptionally low overpotential of 18.2 mV at 100 mA cm −2 , outperforming most reported transition-metal catalysts and even surpassing commercial Pt/C. Mechanistic insights from in situ Raman and DFT reveal that interfacial charge redistribution between Ni 3 S 4 and Ni 3 Mo optimizes H* adsorption (Δ G H* ≈ 0.04 eV) and significantly reduces the water-dissociation barrier (0.08 eV), thereby accelerating reaction kinetics. This work demonstrates how the ML-guided optimization can synergistically couple morphology control, interfacial engineering with electronic tuning, offering a generalizable framework for intelligent catalyst discovery and mechanistic understanding in electrochemical energy conversion.
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高影响因子
ACS Omega
·
2026
·
IF 4.3
Hua Li,Fang Su,Shuiqiang Chen,Yong Gao,Ke-Wen Tang
Metal–organic frameworks (MOFs) have received widespread attention in various energy related applications due to their unique structural characteristics. Nevertheless, the inherent low electronic conductivity of MOFs is a major limitation for their competitive activity. Herein, we synthesized a self-standing NiFe MOF@Ni3S2 core–shell hierarchical heterostructure through using Ni3S2 grown on nickel foam (NF) as a semisacrificial template, in which the highly conductive Ni3S2 nanosheets core endows the hybrid with rapid charge transfer capability, and the bimetallic NiFe MOF nanosheets provide abundant exposed active sites. Benefiting from the structural and compositional advantages, the enhanced electrocatalytic activity of the as-obtained NiFe MOF@Ni3S2/NF has been achieved toward alkaline oxygen evolution reaction (OER). As a result, the NiFe MOF@Ni3S2/NF only requires overpotentials of 177 and 219 mV to yield OER current densities of 10 and 100 mA cm–2, respectively, and exhibits a very small Tafel slope of 24.1 mV dec–1 and high durability, making it among the most efficient earth-abundant OER catalysts. This study will inspire further construction of MOF-based nanocomposites for applications in electrochemical renewable energy systems.
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高影响因子
危险品化学品经营许可证（带存储）