JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
·
IF 4.6
Cheng Pan,Changlin Dong,Wenshu Chen,Shenhua Qian,Jingxiang Yin,Yongping Du,Leiming Lang,Guoqiang Luo,Jian Zhang
Monolayer Pt doped 1T phase MoS 2 quantum sheets (Pt/1T–QSs) were synthesized. • The Pt/1T–QSs show 70% metallic 1T phase with a lateral size of ca. 6.1 nm. • Pt doping collaboratively activate both basal and edge sites of MoS 2 for HER. • The Pt/1T–QSs exhibit exceptional alkaline HER performance. Transition metal disulfides (TMDs) are considered as promising alkaline hydrogen evolution reaction (HER) catalysts; however, their catalytic activity remains far from satisfactory. This is primarily due to the relatively low HER activity of both basal and edge sites. Herein, a strategy of synthesizing Pt doped 1T phase MoS 2 quantum sheets (Pt/1T–QS) for co-activating both basal and edge sites is reported for addressing the aforementioned issue. The developed strategy employs a wet-chemical synthetic route encompassing a hydrothermal doping reaction, a subsequent chemical lithiation, and a final liquid exfoliation process to prepare the desired Pt/1T–QSs (monolayered with lateral size of ca. 6.1 nm). Notably, the Pt/1T–QSs demonstrate exceptional alkaline HER performance, presenting a low overpotential of 203 mV at 300 mA cm −2 and excellent durability for over 120 h at 100 mA cm −2 in 1 M KOH. Theoretical calculations reveal that Pt doping induces pronounced up-shifts for the p −/ d –band centers and collaboratively optimized ΔG H at both basal and edge sites in 1T–QS, thereby accelerating water dissociation kinetics and enhancing alkaline HER performance. This work offers a generalizable strategy for overcoming the conventional edge-dominated activity paradigm of TMD-based catalysts and may advance the rational design of high-performance alkaline HER catalysts with multi-site activation. A rational designed catalyst of Pt doped 1T phase MoS 2 quantum sheet (Pt/1T–QS) material was prepared, characterized by monolayer thickness, quantum sized, dominant 1T phase, and uniformly distributed Pt dopants. The Pt doping collaboratively activates both the basal and edge sites of 1T–QS by accelerating water dissociation kinetics and optimizing hydrogen adsorption energies, resulting in outstanding alkaline HER performance. Download: Download high-res image (150KB) Download: Download full-size image
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yong Yan,Xigui Lan,Yuzhou Li,Zhihao Xiong,Meihua Liang,Jiaxuan Yang,Xiaodong Liu,Rongrong Jia,Yuanyuan Ge,Lian Duan,Mitsuo Shoji,Yasuteru Shigeta,Zhili Li,Lei Huang
With the rapid development of the hydrogen energy economy, there is an increasingly urgent demand for low-power-consumption and integrable sensors capable of accurate and real-time monitoring of hydrogen (H2). In this study, SnO2 nanoparticles rich in oxygen vacancies were successfully prepared via a metal–organic framework (MOF)-derived method. Based on this, highly dispersed Pt-modified SnO2 nanoparticles were fabricated using a two-step annealing method, and a MEMS H2 sensor with high response and low power consumption was developed. Studies have shown that the 0.5%Pt-SnMOF/600-SnO2 sensor exhibits a high response of 31.5 to 100 ppm of H2 at an operating temperature of 201 °C, which is 2.7 times that of the SnMOF/600-SnO2 sensor (with an optimal operating temperature of 244 °C), and its power consumption is only 22.1 mW. Furthermore, this sensor demonstrates excellent comprehensive performance, including an extremely low limit of detection of 73.6 ppb, outstanding selectivity, and good long-term stability. Mechanistic studies indicate that the enhancement of gas-sensing performance is due to a combination of factors: plentiful oxygen vacancies, the role of Pt in promoting oxygen reactions, and its effect on the material’s electronic properties.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Weizhen Xie,Yue Tang,Jiacheng Li,Yaqi Shi,Shigang Su,Yong Sun,Lu Lin,Xing Tang
The aqueous-phase hydrogenation of concentrated 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl)furan (BHMF) is a crucial transformation for sustainable chemical production. However, this process is often limited by sluggish H 2 activation at low temperatures and poor selectivity arising from over-hydrogenation. Here, we develop a Pt catalyst supported on oxygen-deficient manganese oxide (Pt/MnO x –O v ), featuring finely dispersed Pt/PtO 2 domains in conjunction with abundant Pt–O–Mn interfacial ensembles. Under mild aqueous conditions (30–60 °C), the catalyst efficiently converts HMF at concentrations up to 40 wt%, delivering a BHMF yield of 90.9 %. In addition, continuous-flow operation at 30 °C sustains BHMF yields above 90 % over a cumulative operation time of 80 h, thereby demonstrating promising potential for industrial application. Mechanistic studies suggest that hydrogen is initially activated on Pt nanoparticles and subsequently undergoes in situ spillover, migrating across the Pt/PtO 2 heterostructure toward adjacent Pt–O–Mn interfacial sites. At these interfacial regions, the asymmetric electronic distribution, induced by nearby oxygen vacancies, facilitates the formation of polarized H δ+ –H δ- species. These reactive hydrogen species, together with the preferential adsorption of the carbonyl group, enable selective hydrogenation while suppressing undesired side reactions. This study demonstrates that tailoring interfacial structures is an effective strategy for improving catalytic performance in biomass upgrading.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Hao Ren,Yi Cao,Tianjiao Ling,Junli Zhu,Jifang Xu,Minqi Sheng
Even though cobalt monophosphide (CoP) has been recognized as a prospective alternative to noble metal-based electrocatalysts in alkaline water splitting, further enhancement of the catalytic activity and durability of CoP in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) requires precise manipulation of its nanoscale spatial architecture and surface electronic structure. Herein, tremella-like Pt, B-codoped CoP nanostructures were successfully anchored on carbon cloth (Pt–B–CoP/CC) through a successive process involving wet chemical deposition, surface Pt impregnation, and phosphorization. The resultant Pt–B–CoP/CC exhibits excellent catalytic activity for both HER and OER, primarily attributed to (i) high-density active sites, (ii) enhanced surface conductivity, and (iii) appropriately modulated electronic structure via Pt, B codoping. In addition, Pt–B–CoP/CC exhibits superaerophobicity, enabling the maintenance of efficient exposure of active sites during electrolysis. In an alkaline medium (1.0 M KOH), the required overpotentials are 52.53 (at −10 mA cm–2) for HER and 224.37 mV (at 10 mA cm–2) for OER, which outperform most of the reported transition metal-based bifunctional catalytic electrode materials. The constructed Pt–B–CoP/CC||Pt–B–CoP/CC cell requires an ultralow cell voltage of 1.51 V (1.74 V) to drive a current density of 10 mA cm–2 (100 mA cm–2). After 100 h of continuous electrolysis, the cell voltage increment is almost negligible at 10 mA cm–2, while at 100 mA cm–2 it increases by only 1.97%, demonstrating the tremendous durability of Pt–B–CoP/CC and its potential applicability in industrial-grade electrolyzers. This study provides inspiration for designing and synthesizing advanced multifunctional catalytic electrodes with high efficiency and long-term stability.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Feitao Fan,Yiting Che,Vadim Efimov,Kuzmin Anton,Shitan Yan,Ting Bian
Developing efficient and durable platinum-based catalysts for the oxygen reduction reaction (ORR) is a major challenge. In this work two Platinum-Zinc Hofmann-type Metal-Organic Frameworks are synthesized by ligand regulation, one with 4,4′-dipyridyl disulfide introducing sulfur and the other with 4,4′-azopyridine as a sulfur-free analogue. After pyrolysis, the sulfur-containing precursor yields small Pt nanoparticles embedded in a sulfur and nitrogen co-doped carbon matrix (Pt/SNC), while the sulfur-free precursor forms intermetallic L1₀-PtZn on nitrogen-doped carbon (L1 0 -PtZn/NC). Zn evaporation and S/N co-doping in Pt/SNC optimize Pt dispersion, tune electronic structures, and strengthen Pt–carbon interactions, whereas the absence of sulfur stabilizes the L1₀-PtZn phase. Pt/SNC shows much smaller particle sizes (~4.98 nm) than L1 0 -PtZn/NC (~10.61 nm) and exhibits the best ORR performance with a half-wave potential of 0.88 V, surpassing Pt/C (0.86 V) and L1 0 -PtZn/NC (0.79 V). Its specific and mass activities are 1.6/1.8 times higher than Pt/C and 2.85/6.4 times higher than L1 0 -PtZn/NC. Durability tests confirm that Pt/SNC retains 78 % of its mass activity after 60,000 cycles. These results demonstrate the effectiveness of ligand regulation and S/N co-doping in designing high-performance Pt-based electrocatalysts.
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ChemNanoMat
·
2023
·Vol. 9
·期 5
·e202200569
·
IF 3.8
Yanyu Li,Xiaoyue Zhang,Jinglin Shen,Wei Qi
Graphical A new type of nanocomposite enzymes has been developed, composed of Pd−Pt nanoparticles, hemin-rGO and CNTs-COOH. The nanocomposites show a high peroxidase-like activity and a linear response toward H 2 O 2 in the range of 0.05–500 μM with a determination limit of 0.01 μM. Based on this, a paper sensor was constructed for H 2 O 2 detection in real samples. Nanocomposite enzymes are attracting intensive attention worldwide. In the present study, a novel colorimetric H 2 O 2 paper sensor was developed based on a new type of nanocomposites composed of Pd−Pt nanoparticles, hemin functionalized reduced graphene oxide (hemin-rGO) and carboxylated carbon nanotubes (CNTs-COOH). The proposed nanocomposites show a high peroxidase-like activity. It provides a sensitive platform showing a linear response toward H 2 O 2 in the range of 0.05–500 μM with a determination limit of 0.01 μM. Based on this, the composites were applied to construct a paper sensor for H 2 O 2 detection in real samples. The cost-effectiveness, simplicity and efficiency of this paper sensor could be developed for “point-of-care” analysis and other related areas.
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Molecular Catalysis
·
2023
·
IF 4.6
Rong Wang,Shuhuai Liang,Jinhua Zhu,Mei Luo,Hailong Peng,Ronghui Shi,Wang Yin
Alkylsilanes, obtained from hydrosilylation of alkenes with tertiary silane, have high commercial application value. It is crucial to develop a heterogeneous Pt-based catalyst with high activity and high regioselectivity to catalyze this hydrosilylation reaction under solvent-free and mild conditions. Herein, a stable Pt(II)-vinyl complex with unique structure was successfully constructed on oxidized rice straw biochar through reasonable structural design and modification steps. Pt particles on the as-prepared catalyst (Pt-VTES-RSOC) were evenly dispersed with relatively minimum particle sizes (0.3∼2.5 nm). Compared to classic homogeneous catalysts, Pt-VTES-RSOC showed superior activity, great regioselectivity for tertiary silanes and high reusability. The apparent kinetic models for representative reactions over Pt-VTES-RSOC were also proposed to simulate the catalytic process under suggested reaction conditions for clarifying the reaction mechanism. The study proved that Pt-VTES-RSOC would have a good industrial application potential in hydrosilylation of alkenes with tertiary silanes by reducing operation cost and increasing the product quality.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yan Hu,Zhiyang Huang,Qing Zhang,Tayirjan Taylor Isimjan,Youqi Chu,Yongbiao Mu,Baoxin Wu,Zebing Huang,Xiulin Yang,Lin Zeng
The development of highly efficient hydrogen evolution electrocatalysts with platinum-like activity requires precise control of active sites through interface engineering strategies. In this study, a heterostructured Co 5.47 N/Mo 5 N 6 catalyst (CoMoN x ) on carbon cloth (CC) was synthesized using a combination of dip-etching and vapor nitridation methods. The rough nanosheet surface of the catalyst with uniformly distributed elements exposes a large active surface area and provides abundant interface sites that serve as additional active sites. The CoMoN x was found to exhibit exceptional hydrogen evolution reaction (HER) activity with a low overpotential of 44 mV at 10 mA cm −2 and exceptional stability of 100 h in 1.0 M KOH. The CoMoN x (−) ||RuO 2 (+) system requires only 1.81 V cell voltage to reach a current density of 200 mA cm −2 , surpassing the majority of previously reported electrolyzers. Density functional theory (DFT) calculations reveal that the strong synergy between Co 5.47 N and Mo 5 N 6 at the interface can significantly reduce the water dissociation energy barrier, thereby improving the kinetics of hydrogen evolution. Furthermore, the rough nanosheet architecture of the CoMoN x catalyst with abundant interstitial spaces and multi-channels enhances charge transport and reaction intermediate transportation, synergistically improving the performance of the HER for water splitting.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Bin Hu,Yongqing Yang,Wei Cao,Xixi Wang,Chuan Zhou,Yiyang Mao,Lei Ge,Ran Ran,Wei Zhou
The high cost and unfavorable catalytic performance for oxygen reduction reaction (ORR) is one of the crucial obstacles that impede widely commercialization of proton-exchange membrane fuel cells (PEMFCs). Herein, we provide a novel, mass-producible ORR catalyst made of low-loading (10 wt%) Pt nanoparticles bound to patchy nitrogen-doped carbon (PNC) with uniformly dispersed FeN 4 sites (Pt/FeN 4 -PNC). The derived catalyst exhibits significantly improved catalytic activity and stability, obtaining a promising mass activity (MA) of 0.94 A mg pt −1 at 0.9 V (vs. RHE) with a negligible decay after 30,000 cycles accelerated durability test (ADT). In the fuel-cell assessment (under H 2 -Air conditions at 80 ℃), the Pt/FeN 4 -PNC and Pt/FeN 4 -PNC-10 g (scaled-up production) achieved peak power densities of 1.13 W cm −2 and 1.14 W cm −2 , respectively, and retained 88.5 % and 88.1 % of the initial values after 30,000 voltage cycles (0.60–0.95 V). The patchy structure of PNC substrate guarantees fast electron routes and resistance to corrosion. With the FeN 4 active sites in the PNC substrate, the oxygen molecules are concurrently reduced on the surfaces of the carbon substrate and Pt nanoparticles, thereby causing the ORR reaction zone on the catalyst layer to expand.
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Chemosensors
·
2023
·Vol. 11
·期 1
·31
·
IF 4.2
Xilai Lu,Menghan Wu,Yong Huang,Jiannan Song,Yong Liu,Zhiqiao Yan,Feng Chen,Jieting Zhao,Wanping Chen
The slight but cumulative influence of impurity gases in air poses a great threat to the long-term stability of room-temperature gas sensors. Room-temperature hydrogen-sensitive Pt–SnO2composite nanoceramics of 5 wt% Pt were prepared through pressing and sintering. The response of a sample was over 10,000 after being exposed to 500 ppm H2S–20% O2–N2at room temperature, and the room-temperature hydrogen sensing capacity was seriously degraded even for samples that had aged dozens of days since H2S exposure. Mild heat treatments such as 160 °C for 10 min were found able to fully activate those H2S-exposed samples. As the peak of S 2p electron was clearly detected in H2S-exposed samples, it was proposed that for room-temperature hydrogen-sensitive Pt–SnO2composite nanoceramics, H2S exposure induced degradation results from the poisoning of Pt by H2S deposited on it, which can be removed through a mild heat treatment. Periodic mild heat treatment should be a convenient and effective measure for room-temperature metal oxide gas sensors to achieve long-term stability through preventing the accumulation of impurity gases in air deposited on them.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 41
·期 6
·887-896
·
IF 3.815
Xin You-Tao,Wang Lu-Yao,Chang Huan-Huan,Ma Fei-He,Sun Ming-Lei,Chen Li,Gao Hui
Oxaliplatin is the common chemotherapy drug for the treatment of colorectal cancer (CRC), however, the harmful Fusobacterium nucleatum ( Fn ) that existed in the CRC tumor tissues leads to extreme drug resistance to oxaliplatin, which reduces the anticancer efficiency. Here we fabricated a new dendrimer-based nanocomplex with anti-tumor and antibacterial dual-functions through conjugating Pt(IV)-complex and lauric acid (LA) to the dendritic carrier PAMAM (G=3). The synthesized PAMAM-Pt-LA nanoparticle was further coated with hyaluronic acid (HA) on its surface through electrostatically interaction in order to enhance biocompatibility and tumor targeting. The biocompatibility, anti-tumor activity and antibacterial activity of PAMAM-Pt-LA@HA nanocomplex were evaluated in vitro. The results showed that the PAMAM-Pt-LA@HA nanocomplex ehxibited a good biocompatibility, high anti-colorectal cancer activity and high anti- Fn activity. This dual-functional nanocomplex provides a new method to develop anticancer nanomedicines that will be more therapeutically efficacious and less toxic than oxaliplatin for the treatment of CRC.
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International Journal of Minerals Metallurgy and Materials
·
2023
·Vol. 30
·期 5
·877-885
·
IF 4.8
Wang Junlian,Liu Lu,Xu Wen,Liu Hui,Xu Guodong,Huang Kun,Yu Fengshan,Huang Guoyong
Platinum group metals (PGMs), especially Pd, Pt, and Rh, have drawn great attention due to their unique features. Direct separation of Pd and Pt from highly acidic automobile catalyst leach liquors is disturbed by various factors. This work investigates the effect of various parameters including the acidity, extractant concentration, phase ratio A/O, and diluents on the Pd and Pt extraction and their stripping behaviors. The results show that the Pd and Pt are successfully separated from simulated leach liquor of spent automobile catalysts with monothio-Cyanex 272 and trioctylamine (TOA). Monothio-Cyanex 272 shows strong extractability and specific selectivity for Pd, and only one single stage is needed to recover more than 99.9% of Pd, leaving behind all the Pt, Rh, and base metals of Fe, Mg, Ce, Ni, Cu, and Co in the raffinate. The loaded Pd is efficiently stripped by acidic thiourea solutions. TOA shows strong extractability for Pt and Fe at acidity of 6 mol·L −1 HCl. More than 99.9% of Pt and all of the Fe are extracted into the organic phase after two stages of countercurrent extraction. Diluted HCl easily scrubs the loaded base metals (Fe, Cu, and Co). The loaded Pt is efficiently stripped by 1.0 mol·L −1 thiourea and 0.05–0.1 mol·L −1 NaOH solutions. Monothio-Cyanex 272 and TOA can realize the separation of Pd and Pt from highly acidic leach liquor of spent automobile catalysts.
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危险品化学品经营许可证（带存储）