NANOTECHNOLOGY
·
2022
·Vol. 34
·期 4
·045402
·
IF 3.953
Wenxin Wang,Kai Deng,Qiqi Mao,Hongjie Yu,Ziqiang Wang,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Interface engineering of two-dimensional (2D) materials by conductive polymer modification is one of the valid methods to promote hydrogen evolution reaction (HER) performance. Herein, we report a simple and universal strategy for the synthesis of polypyrrole (PPy) modified Rh metallene (Rh@PPy metallene) towards an efficient pH-universal HER. Due to the unique ultrathin 2D metallene structure and the optimized electronic structure between the metallene-PPy surfaces, the as-prepared Rh@PPy metallene not only exhibits excellent HER activity with low overpotentials of 16, 39 and 42 mV in 0.5 M H2SO4, 1 M KOH, and 1 M phosphate buffer solution at current density of 10 mA cm−2, but also displays outstanding stability and durability. This work provides a well-founded pathway to constructe metallene-organic interfaces for various electrocatalytic applications.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xingcong Zhang,Hao Zhang,Guanghui Guo,Qingdi Sun,Xiaohui He,Hongbing Ji
Rhodium nanoparticles supported on phosphorus-doped carbon (Rh/PC) are successfully prepared by the ball-milling method with sodium hypophosphite as the phosphorus source. The catalyst exhibits superb conversion (93.6%) and high regioselectivity (branched aldehydes/linear aldehydes = 20.2:1) for the hydroformylation of styrene compared to the phosphorus-free (Rh/C) and metal-free (PC) catalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 19
·10222-10227
·
IF 11.9
Ziqiang Wang,Guanghui Yang,Pengjun Tian,Kai Deng,Hongjie Yu,You Xu,Xiaonian Li,Hongjing Wang,Liang Wang
Water electrolysis for hydrogen production consumes abundant electronic energy owing to the sluggish oxygen evolution reaction (OER), so the integration of the hydrogen evolution reaction (HER) with thermodynamically more favorable oxidation reactions is a promising strategy for energy-efficient hydrogen production. Herein, we propose the epitaxial confinement of rhodium nanoparticles (NPs) to palladium metallene (Rh/Pd metallene) for hydrogen production assisted by the hydrazine oxidation reaction (HzOR). The two-dimensional structure of Rh/Pd metallene provides sufficient active sites as well as a rapid charge transfer rate. The interface of Pd metallene with Rh NPs ensembles to modulate the electronic state, thus optimizing the adsorption energy of reaction intermediates. The Rh/Pd metallene exhibits splendid HER and HzOR activities, with overpotentials of 59 and 7 mV at 10 mA cm−2, respectively. In the two-electrode construction of a hydrazine oxidation-assisted water splitting system, the Rh/Pd metallene only needs a low overpotential of 0.19 V to produce hydrogen at a current density of 100 mA cm−2. This research offers a viable approach for designing nanosheet/nanoparticle heterojunction as an attractive modular platform for energy-saving hydrogen production.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Kaidi Zhang,Hai Wang,Rui Tang,Yuan Huang,Yating Lv,Huixin Wu,Qingsong Luo,Wentao Yuan,Yong Wang,Liang Wang,Feng-Shou Xiao
Catalytic hydrogenation of carbon dioxide (CO2) into carbon monoxide (CO) is a key process during the CO2 conversion into high-value chemicals but lacks stable and selective catalysts due to catalyst deactivation from surface restructuring under the reaction conditions. We showed that the supported Rh catalyst modified with titanium oxide overlayers (Rh@TiOx/TiO2) offered nearly full selectivity for conversion of CO2 to CO in a wide reaction temperature window, gas space velocities, and H2/CO2 ratios. The high CO selectivity was maintained even after treating the Rh@TiOx/TiO2 catalyst in oxidative, reductive, and humid atmospheres, giving good stability for 500 h at 500 °C. Kinetic studies and characterizations of the catalysts reveal that the high selectivity and stability result from the hindered CO-Rh interactions and stable Rh-TiOx interfaces. Similarly, supported Pd and Pt catalysts (Pd@TiOx/TiO2 and Pt@TiOx/TiO2) were also successfully prepared, which showed high CO selectivity and good stability in selective CO2 hydrogenation, providing a generalized route for the preparation of highly stable and selective hydrogenation catalysts.
研究领域:
催化化学
·
材料化学
·
环境化学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Lei Liu,Xiao-Chao Chen,Shu-Qing Yang,Yin-Qing Yao,Yong Lu,Ye Liu
Formic acid (FA) is one kind of important bulk chemicals, which is recognized as a sustainable and eco-friendly energy carrier to transport H 2 via dehydrogenation or CO via decarbonylation. Expectantly, FA upon decomposition into H 2 and CO could be used as the syngas alternative for hydroformylation. In this paper, the behaviors of FA to release H 2 as well as CO following the distinct pathways were carefully investigated for the first time, and then established a new hydroformylation protocol free of syngas. It was found that the atmospheric hydroformylation of olefins with formic acid (FA) as syngas alternative was smoothly fulfilled over Xantphos ( L1 ) modified Rh-catalyst under mild conditions (80 °C, Rh concentration 1 mol %, 14 h), resulting in >90% conversion of the olefins along with the high selectivity to the target aldehydes (>93%). By using FA as syngas source, the side-reaction of olefin-hydrogenation was greatly depressed. The in situ FT-IR and the high-pressure 1 H NMR spectroscopic analyses were applied to reveal how FA behaves dually as CO surrogate and hydrogen source over L1 -Rh(acac)(CO) 2 catalytic system, based on which the deeply insight into the catalytic mechanism of hydroformylation of olefins with FA as syngas alternative was offered.
研究领域:
催化化学
·
绿色化学
·
能源化学
✓ 已验证
DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 11
·2212
·
IF 2.467
Wenxiu Rao,Hao Liu,Guocheng Lv,Danyu Wang,Libing Liao
Nano zero-valent iron has drawn great attention for the degradation of organic dyes due to its high reactivity, large specific surface area, lightweight, and magnetism. However, the aggregation and passivation of iron nanoparticles may prohibit the wide use of it. A new composite material was prepared by loading nano zero-valent iron (nZVI) on montmorillonite (MMT) to overcome the above shortcomings and it was further used for the removal of Rhodamine 6G (Rh 6G) under microwave treatment in the present work. The effects of various parameters, including the initial concentration of Rh 6G, microwave power, and pH value were investigated. The new composite material (nZVI/MMT) showed an excellent degradation ability for removing Rh 6G, and the removal amount reached 500 mg/g within 15 min. The degradation rate reached 0.4365 min−1, significantly higher than most previous reports using other removal methods for Rh 6G.Keywords:nano zero-valent iron;montmorillonite;organic dyes;Fenton-like reaction;microwave
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Yanke Huang,Pengzhen Yin,Xingtao Zhao,Fengqi Zhang,Huibing Shi,Zhaozhan Wang,Chen Li,Xufeng Lin,Yong Yang
Developing ligand-free heterogeneous catalysts capable of efficient and selective hydroformylation of sterically hindered alkenes remains a challenge. In this work, we report a stable and highly efficient ligand-free heterogeneous catalyst comprising atomically dispersed Rh sites anchored on N-doped SiO 2 . The N-doped SiO 2 support was synthesized through a sol-gel method followed by high-temperature calcination under an inert atmosphere, endowing it with a large surface area, hierarchical pores, and tunable nitrogen content. This support facilitates the atomic dispersion and stabilization of Rh sites via strong Rh-N bond coordination. The morphological structure and local environment of single-Rh sites was comprehensively characterization by means of X-ray diffraction (XRD), N 2 sorption isotherm, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), high-angle angular dark field scanning transmission electron microscopy (HAADF-STEM), X-ray photoelectron spectroscopy (XPS), CO in-situ diffuse reflectance infrared Fourier transform spectroscopy (CO-DRIFTS), and X-ray absorption spectroscopy (XAS). The resulting catalyst exhibits outstanding catalytic performance and excellent selectivity in the hydroformylation of diisobutylene and also shows broad applicability to various other alkenes, including α-olefins, internal alkenes, and aromatic alkenes. Furthermore, it exhibits remarkable stability and recyclability, maintaining its catalytic performance without degradation upon successive cycles. Comparative studies further confirm the essential role of N-doping in achieving high activity and stability.
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 5
·1298-1306
·
IF 5.958
Xiugang Li,Chunling Zhang,Minghong Luo,Qilu Yao,Zhang-Hui Lu
Nitrogen-rich covalent organic frameworks (COFs) with a high content of nitrogen and an inherent porous skeleton are considered as a remarkable support for encapsulating active metal nanoparticles (MNPs). Herein, a cost-effective and nitrogen-rich COF (PC-COF) synthesized from piperazine and cyanuric chloride was used as a carrier for encapsulating Rh NPs via a metal–nitrogen (M–N) coordination reduction strategy. Numerous precisely tailored N atoms within the PC-COF facilitate the construction of Rh–N complexes between Rh ions and N atoms, which can be in situ reduced to produce ultrafine Rh NPs confined in the pores of the PC-COF. The optimized Rh/PC-COF catalyst shows uniform dispersibility and a fairly narrow distribution (1.4–2.6 nm) of Rh NPs, giving an ultrahigh catalytic activity for the methanolysis of ammonia borane (AB) with a total turnover frequency (TOF) of 505 min−1 at 298 K. The excellent catalytic performances can be ascribed to the ultrafine particle size, electronic-rich Rh NPs, and the synergistic effect of the Rh NPs and PC-COF. The M–N coordination reduction strategy for encapsulating ultrafine MNPs into the pores of COFs opens a valuable pathway for developing metal nanocatalysts with high catalytic performance and excellent stability.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·Vol. 43
·期 14
·7038-7045
·
IF 4.229
Rui Lu,Min Hu,Caili Xu,Yi Wang,Yun Zhang,Bin Xu,Daojiang Gao,Jian Bi,Guangyin Fan
Developing effective catalysts for hydrogen evolution from hydrolysis of ammonia borane (AB) is of great significance considering the useful applications of hydrogen. Herein, graphitic carbon nitride (g-C 3 N 4 ) prepared through the simply pyrolysis of urea was employed as a support for Rh nanoparticles (NPs) stabilization. The in-situ generated Rh NPs supported on g-C 3 N 4 with an average size of 3.1 nm were investigated as catalysts for hydrogen generation from the hydrolysis of AB under mild conditions. The Rh/g-C 3 N 4 catalyst exhibits a high turnover frequency of 969 mol H 2 · (min·mol Rh ) −1 and a low activation energy of 24.2 kJ/mol. The results of the kinetic studies show that the catalytic hydrolysis of AB over the Rh/g-C 3 N 4 catalyst is a zero-order reaction with the AB concentration and a first-order reaction with the Rh concentration. This work demonstrates that g-C 3 N 4 is a useful support to design and synthesis of effective Rh-based catalyst for hydrogen-based applications.
研究领域:
催化化学
·
能源材料
·
纳米催化
·
氢能源
·
反应动力学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2026
·
IF 6
Guo-Sheng Zhang,Guo-Zheng Li,Long-Ge Hu,Chen Chen,Pei-Ying Peng,Ying-Xi Hua,Ye Liu
Synthesis of silyl-containing phosphines. • Hydrosilyl-containing phosphines as hydrido-source for formation of rhodium-hydride intermediate. • Hydroaminomethylation with hydrosilyl-containing phosphine ( L2 ) modified Rh-catalyst. Herein a series of silyl-containing P,Si-hybrid ligands ( L2-L6 ) were synthesized, in which L2 was first obtained via the combination of a bulky hydrosilyl-group (Ph 2 HSi-) and a bulky ( t -Bu) 2 P-fragment. The as-synthesized L2-L6 were fully characterized by 31 P/ 1 H/ 13 C NMR and the single-crystal X-ray diffraction to verify the presence of the expected Si-H moiety and their influence on the adjacent phosphine fragment. It was indicated that the incorporated hydrosilyl-group in L2 not only effectively adjusts the electronic and steric effects on the adjacent phosphino-groups but also could directly serve as a hydrido-source to promote the formation of the Rh-H (rhodium-hydride) active intermediate, thereby allowing an efficient Rh-catalyzed hydroaminomethylation of olefins. The 1 H NMR characterization proved that the presence of Si-H moieties in L2 enables the formation of stable Rh-H active species even at room temperature. This efficient generation of metal hydride greatly facilitates the first-step hydroformylation and the second-step condensation, thereby promoting the overall hydroaminomethylation sequence. Download: Download high-res image (208KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122285
·
IF 7.5
Faruk Omar,Dian Ding,Zhuo Chen,Zhihua Zhao
Selective room-temperature detection of 1-octen-3-ol, a representative fungal volatile organic compound (VOC) associated with food spoilage, remains challenging due to limited adsorption–activation efficiency in conventional sensing materials. Herein, pristine Zeolitic imidazolate framework (ZIF-67) and Rhodium (Rh)-decorated ZIF-67 (Rh@ZIF-67) were developed as chemiresistive sensing materials via a mild solution-based strategy, achieving controlled Rh loadings (0.4–0.6%) while preserving the polyhedral ZIF-67 framework. The crystal structure, surface chemical states, porosity, and morphology were systematically characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) surface area analysis, scanning electron microscopy (SEM), and transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy (TEM/EDS), confirming that the ZIF-67 framework was preserved and Rh species were successfully anchored on the porous host. At room temperature (25°C), the optimized 0.5%Rh@ZIF-67 sensor exhibits a stable concentration-dependent response over 5–50 ppm, delivering a response of 2.41 at 50 ppm—approximately 15.1 times higher than pristine ZIF-67 (0.16) with response and recovery times of 90 s and 119 s, respectively. The sensor further demonstrates good selectivity, repeatability, and long-term stability over 25 days. Humidity evaluation (30–90%) Relative Humidity (RH) indicates moderate response attenuation attributed to competitive adsorption of water molecules. The enhanced sensing performance is attributed to synergistic adsorption enrichment from porous ZIF-67 combined with Rh-induced catalytic and electronic sensitization, enabling efficient resistance modulation under ambient conditions. This work provides a promising strategy for low-power, selective monitoring of spoilage-related VOC biomarkers in practical storage environments.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Xue Mingchen,Jin Liguo,Xu Junhao,Su Chaoying,Liu Xusheng,Fu Yaxian
CsPbIBr 2 inorganic perovskite films have become one of the photovoltaic materials with great development potential due to their excellent wet thermal stability and excellent photovoltaic performance, as well as relatively simple preparation process. However, the preparation process and film-forming mechanism of CsPbIBr 2 thin films are still immature, and the films are prone to structural defects such as pinholes and grain boundaries, resulting in poor film-forming quality. Here, in this study, the controlled preparation of CsPbIBr 2 films was achieved under additive-free conditions by regulating the humidity and temperature during the film-forming process in combination with the substrate preheating treatment (SPT) strategy, and the ambient temperature–relative humidity influence on the grain growth of CsPbIBr 2 ₂ was systematically explored to achieve the highest film coverage at 80–90 °C, and different surface topographies were obtained under different environments, CsPbIBr 2 films with different surface morphology, crystallinity, light absorption properties, and grain size were obtained under different environments. Notably, the CsPbIBr 2 films prepared at 20 °C, RH: 10% exhibited smooth and flat surface morphology, with larger grain size and fewer grain boundaries, and the corresponding carbon-based PSC devices achieved excellent photovoltaic performance, with the Jsc: 10.98 mA/cm 2 , Voc: 1.16 V, FF 0.55, and PCE of 6.95%.
研究领域:
光伏技术
·
材料科学
·
钙钛矿太阳能电池
·
薄膜制备
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）