ACS Omega
·
2016
·
IF 0
Yanyan Liu,Shimin Wang,Congcong Xing,Hang Du,Chenxia Du,Baojun Li
A novel template-activation method was used to create nanoporous carbon materials derived from core–shells@rGO sheets. The carbon materials were prepared through an acid etching and thermal activation procedure with three-dimensional Fe3O4@C@rGO composites as precursors and Fe3O4 nanoparticles as the structural template. The activation at different temperatures could provide materials with different specific surface areas. The unique nanoporous structures with large surface areas are ideal adsorbents. The nanoporous carbon materials were used as adsorbents for the removal of rhodamine B (Rh-B). C@rGO-650 illustrated better adsorption performance than the other synthesized adsorbents. It displayed good recyclability, and its highest adsorption capacity reached up to 14.8 L·g–1. The remarkable adsorption properties make nanoporous carbon a useful candidate for wastewater treatment. This template-activation method can also broaden the potential applications of core–shells@sheet structures for the construction of nanoporous carbon, which helps to resolve the related energy and environmental issues.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
GREEN CHEMISTRY
·
2017
·Vol. 20
·期 1
·188-196
·
IF 9.125
Lin Tao,Mingmei Zhong,Jian Chen,Sanjeevi Jayakumar,Lina Liu,He Li,Qihua Yang
An efficient heterogeneous catalytic system for hydroformylation of long-chain alkenes is highly desirable for both academy and industry. In this study, an IL-in-oil Pickering emulsion system was employed for heterogeneous hydroformylation of 1-dodecene with Rh-sulfoxantphos as the catalyst and surface modified dendritic mesoporous silica nanospheres (DMSN) as the stabilizer. The IL-in-oil Pickering emulsion system outperformed IL-oil biphase, water-in-oil Pickering emulsion and IL-oil micelle system under similar reaction conditions to afford n/b ratio of 98 : 2, chemoselectivity of 94% and TOF of 413 h−1, among the highest ever reported for IL-oil biphase hydroformylation of long-chain alkenes. The high efficiency of IL-in-oil Pickering emulsion was primarily attributed to the increased interface area and unique properties of ILs. Studies also revealed that solid stabilizers with large and open pore channels could greatly increase the reaction rate of Pickering emulsion systems by accelerating the diffusion rate. The recyclable IL-in-oil Pickering emulsion is promising not only for hydroformylation of long-chain alkenes but also for catalytic reactions with immiscible liquids.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Xiuqin Dong,Chen Xin,Lingtao Wang,Hao Gong,Yifei Chen
Immobilization of the Rh active sites in novel porous materials has attracted attentions for solving the problems of separation and recycling of homogeneous catalysts. In this work, a comparative study of phosphine modified 1Rh/MOF-5 using three different methods was reported, namely 1Rh-P/MOF-5, 1Rh/MOF-5-P and 1Rh/MOF-5-PPh 3 . Similar with the traditional methods, PPh 3 was etched on Rh particles by impregnation in 1Rh-P/MOF-5 and encapsulated in the pores by solvothermal method in 1Rh/MOF-5-P. Moreover, we proposed a novel post-synthesis strategy for grafting phenyl phosphine on the organic linkers in 1Rh/MOF-5-PPh 3. The position of phenyl phosphine in MOFs and the effect of phosphine on the Rh active sites in hydroformylation were investigated by XRD, IR, XPS, TGA and DRIFTS. 1Rh/MOF-5-PPh 3 exhibited the best catalytic activity and stability than 1Rh-P/MOF-5 and 1Rh/MOF-5-P in the hydroformylation of 1-butene. Different P/Rh ratio in P-modified 1Rh/MOF-5 led to the spatial environment change around the Rh active sites. This study showed details in the role of phosphine ligands played in hydroformylation reactions and provided some guidance for MOFs materials in the immobilization of homogeneous catalysts.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Jieting He,Ying Tao,Yu Liang,Liang Zhao,Xiaoyang Jerry Huang,Rena Oh,Shi-Gang Sun,Lei Liu,Jinxiang Dong
Hydrogenation of aromatic compounds under mild conditions remains challenging because of the high stability of aromatic π systems. Here, we report a physically mixed catalyst comprising rhodium (Rh) and cobalt (Co) nanoparticles embedded in montmorillonite (MMT) that overcomes this limitation. The enhanced activity arises from dynamic interparticle cooperation: Rh nanoparticles selectively dissociate H2, and the resulting hydrogen intermediates are transferred through particle collisions to Co nanoparticles, where aromatic hydrogenation occurs. This cooperative process can be finely regulated by tuning the oxidation states of the individual metal nanoparticles, leading to catalytic performance surpassing that of corresponding Rh−Co alloy catalysts (initial rate: 45 vs 9 μM s-1). Combined experimental and computational investigations reveal that cooperative catalysis can be quantitatively described using linear regression analysis and thereby be predicted through the rate ∼k × (Co2+/Co3+)/(Rh0/Rh3+). Our findings establish a data-driven statistical approach for designing high-performance bimetallic catalysts based on dynamic interparticle interactions.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiaxin Yuan,Jianrui Feng,Gang Li,Yinghao Song,Na Yu,Xi Chen,Guanjie He,Yeshu Tan,Meng Ni
Developing efficient electrocatalysts for pH-universal hydrogen evolution reaction (HER) is particularly appealing due to the growing demands of clean and renewable energy. Herein, a facile electrodeposition method to construct Rh nanoclusters supported by molybdenum trioxide micro sheets (Rh/MoO 3 ) was developed. The use of MoO 3 support can enhance hydrogen production due to the accelerated electron transfer by Mo. The interaction between the interface of Rh and MoO 3 modulates the hydrogen adsorption energies. The interfacial electron transfer from Rh to Mo optimizes H 2 O adsorption, adjusts the d-band center, and fine-tunes the hydrogen binding energy, hence increasing the inherent hydrogen-evolving activities. Therefore, the Rh/MoO 3 catalyst shows outstanding performance with very low overpotentials of only 34, 49, and 29 mV at a current density of −10 mA cm −2 in 1.0 M PBS, 0.5 M H 2 SO 4 , and 1.0 M KOH electrolytes, respectively. Our findings also help to create effective catalysts for pH-universal HER by leveraging particle-support interactions.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Guangxia Wang,Wenhui Wang,Xiuwei Sun,Liwen Zhou,Yongming Sui,Fuxin Wang,Dezhou Zheng,Zheng Liu,Qi Feng
Developing highly efficient catalysts for the hydrogen evolution reaction (HER) is crucial for advancing renewable hydrogen energy technologies. Heterophase nanomaterials have shown great promise in catalysis, owing to the synergistic effect among various phases and the abundance of active sites located at the phase boundaries or interfaces. However, achieving precise control over these phase structures during synthesis remains a significant challenge. In this work, we explored a one-pot synthesis method for amorphous/crystalline heterophase Rh nanoparticles, with crystallinity tunable by adjusting the quantity of urea and reaction duration. Due to the increased electrochemical active sites, enhanced electron transport, the resulting amorphous/crystalline heterophase Rh exhibits superior HER activities in both acidic (with an overpotential of 27 mV) and alkaline media (with an overpotential of 21 mV), surpassing that of commercial Pt/C and crystalline Rh. Theoretical calculations indicate that the amorphous/crystalline structure reduces the kinetic barrier for water splitting and optimizes adsorption free energy of hydrogen (ΔG H∗ ), thereby enabling the catalyst to exhibit significantly enhanced HER performance. This exploration offers a valuable reference for designing amorphous/crystalline heterophase structures and demonstrates the great potential of phase engineering strategy in the development of electrocatalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Xinyu Yang,Yueying Zhang,Xidong Hao,Yang Song,Xishuang Liang,Fengmin Liu,Fangmeng Liu,Peng Sun,Yuan Gao,Xu Yan,Geyu Lu
In this paper, an amperometric gas sensor based on proton exchange membrane (Nafion) was fabricated for H 2 S detection at room temperature . Pt-Rh nanoparticles loaded on carbon fibers, as sensing electrode , was prepared by chemical reduction method, and membrane electrode assemble (MEA) was fabricated using hot-pressing method. X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM) were used to analyze the structure and morphology of the fabricated electrode material. The effect of the weight ratio of Pt to Rh on the performance of the sensor was investigated and the results showed that the sensing performance was best when the ratio of Pt to Rh was 1:1. Moreover, the sensitivity had been significantly improved due to the use of carbon fibers pretreated by nitric acid, increasing from 0.158 μA/ppm to 0.191 μA/ppm. The present sensor could detect H 2 S at levels as low as 0.1 ppm with a −20 nA response and had a good linear relationship in the range of 0.1 to 200 ppm H 2 S. In addition, this amperometric H 2 S sensor displayed fast response-recovery rate as well as excellent selectivity and stability.
研究领域:
材料科学
·
环境监测
·
化学传感器
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Ge Ma,Qi Xue,Jingyi Zhu,Xiaoyu Zhang,Xin Wang,Hongchang Yao,Guofu Zhou,Yu Chen
Heterostructured noble metal/transition metal nanohybrids have attracted increasing attention in energy/environment-related electrocatalysis field due to their high activity. In this work, the ultrathin NiO nanosheets (NiO-NSs) decorated with ultrafine Rh nanocrystals (Rh-NCs) electrocatalyst (termed as Rh-NCs/NiO-NSs) is successfully synthesized by using mixed-cyanogels-NaBH 4 method and succedent heat treatment. Physical characterizations confirm that as-prepared Rh-NCs/NiO-NSs have 1.6 nm thickness and a large specific surface area of 166.2 m 2 g −1 , and ultrafine Rh-NCs are uniformly dispersed on surface of NiO-NSs. Electrochemical measurements show that the incorporation of Rh-NCs can promote the generation of Ni III OOH species and accelerate the oxidation of CO, thus significantly improving the electrocatalytic performance of NiO-NSs for urea electro-oxidation reaction (UEOR). The UEOR current at Rh-NCs/NiO-NSs achieves the 616 mA mg −1 at 1.55 V potential, which is 11.5 times bigger than that at NiO-NSs in 1 M KOH solution with 0.33 M urea. Additionally, Rh-NCs/NiO-NSs also show excellent long-term stability due to improved structural/chemical stability and anti-poisoning capability.
研究领域:
电化学
·
材料科学
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 25
·12378-12384
·
IF 11.301
Fang Luo,Long Guo,Yuhua Xie,Jingxiang Xu,Weiwei Cai,Konggang Qu,Zehui Yang
Efficient electrocatalysts for the hydrogen evolution reaction (HER) in both acidic and alkaline media are prominently important to advance the widespread application of industrial water splitting technology. In this work, we have synthesized ultrasmall rhodium–rhodium phosphide hetero-nanoparticles (3.4 nm, Rh–Rh2P@C) by partial phosphorization of Rh@C at 300 °C together with Na2HPO2. The constructed Rh–Rh2P@C requires only 24 mV and 37 mV overpotentials to reach 10 mA m−2 in 0.5 M H2SO4 and 1 M KOH electrolytes, which are lower than those of Rh@C and Rh2P@C due to the formation of heterointerfaces inducing modulation of local electronic structures and more active sites; as a result, a more moderate hydrogen adsorption–desorption strength is achieved for Rh–Rh2P@C as proved by theoretical calculation. Moreover, the calculated mass activity of Rh–Rh2P@C is 4 orders of magnitude higher than that of the benchmark Pt/C electrocatalyst. Besides, exceptional stability is recorded for Rh–Rh2P@C in both acidic and alkaline electrolytes due to the strong electronic interaction between Rh and Rh2P. This study offers a new strategy to manufacture efficient electrocatalysts for various applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Jing Yang,Liang Zhao,Shaotong Liu,Yuanyuan Wang,Liyi Dai
Catalytic hydrocracking of kraft lignin was carried out in isopropanol system and an orthogonal array design (OAD) was employed to optimize the experimental conditions. GC–MS/FID, elemental analysis, GPC and 1 H- 13 C HSQC NMR were carried out for entire investigation of the liquid products. The results indicated that the hydrocracking process was thermally controlled and catalysts showed significant influences on the product distributions. Comparing with Pd/C, Pt/C and Ru/C, Rh/C inhibited the self-condensation of isopropanol and reduced the formation of oxygenic-chain compounds. The excellent catalytic activity for phenols conversion was obtained over Rh/C. The routes of oxygenic-chain compounds formation and phenol conversion were proposed in detail. The least oxygenic-chain compounds formation, the highest phenols conversion (93.4%), the lowest O/C ratio (0.094) and the highest HHV (37.969 MJ/kg) provided the possibility of the high quality bio-oil obtained over Rh/C in isopropanol medium.
研究领域:
化学工程
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2025
·
IF 13.5
Jianan Hong,Chenyu Xu,Yan Liu,Changqi Li,Menglin Wang,Yanwei Zhang
Solar-driven photothermal catalytic CO 2 conversion with H 2 O is a promising approach to produce sustainable fuels and chemicals. However, the competition between hydrogen evolution reaction (HER) and CO 2 reduction reaction (CO 2 RR) results in unsatisfactory product selectivity. Noble metal nanoparticles (NMNPs) are widely used cocatalysts to introduce active sites on semiconductors, with unique active sites at the metal-semiconductor interfacial edges playing a critical role in the competitive mechanisms. Herein, we prepared a series of NMNPs loaded on Al-doped SrTiO 3 with abundant interfacial edge sites for continuous photothermal catalytic CO 2 and H 2 O conversion. Different NMNPs demonstrated distinct CO 2 -induced effects on hydrogen evolution. The key intermediate interactions were investigated by in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations. The results revealed that bidentate carbonate (b-CO 3 2− ) tended to occupy the edge sites at the metal-semiconductor interfaces, competitively consuming the active sites for *H adsorption and altering the energy barrier of hydrogen evolution. The predominant site-blocking effect of b-CO 3 2− on Rh-loaded catalysts was verified through establishing a simplified geometric model to quantify the correlation of particle sizes, active site proportions and CO 2 -induced hydrogen production variations. Controlling Rh nanoparticle size can tune the proportion of edge sites, which involves a trade-off between *H coverage and CO 2 activation and promotes the CO 2 RR process toward methane production. This work initially unravels the interfacial competitive mechanism between HER and CO 2 RR via edge-active-site modulation, hoping to provide valuable insights for the rational catalyst design and offer potential strategies to enhance CO 2 conversion efficiency.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Science Bulletin
·
2021
·
IF 11.78
Yang Li,Xian Wang,Bingbao Mei,Ying Wang,Zhaoyan Luo,Ergui Luo,Xiaolong Yang,Zhaoping Shi,Liang Liang,Zhao Jin,Zhijian Wu,Zheng Jiang,Changpeng Liu,Wei Xing,Junjie Ge
Proton exchange membrane fuel cells (PEMFCs) suffer extreme CO poisoning even at PPM level (<10 ppm), owning to the preferential CO adsorption and the consequential blockage of the catalyst surface . Herein, however, we report that CO itself can become an easily convertible fuel in PEMFC using atomically dispersed Rh catalysts (Rh-N-C). With CO to CO 2 conversion initiates at 0 V, pure CO powered fuel cell attains unprecedented power density at 236 mW cm −2 , with maximum CO turnover frequency (64.65 s −1 , 363 K) far exceeding any chemical or electrochemical catalysts reported. Moreover, this feature enables efficient CO selective removal from H 2 gas stream through the PEMFC technique, with CO concentration reduced by one order of magnitude through running only one single cell, while simultaneously harvesting electricity. We attribute such catalytic behavior to the weak CO adsorption and the co-activation of H 2 O due to the interplay between two adjacent Rh sites.
研究领域:
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）