JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jinyun Liao,Yuanzhong Li,Jingjing Tian,Yufa Feng,Quanbing Liu,Hao Li
Catalytic methanolysis of ammonia borane is an integrated hydrogen production/storage technology with bright prospects, while its wide application is impeded by the high-cost of catalysts. In this work, hollow core@shell structured (HCSS) Co 3 O 4 @CuO-NiO with a size of 300–500 nm and a shell thickness of ca. 100 nm has been designed for ammonia borane (NH 3 BH 3 ) methanolysis for rapid hydrogen release. The possible formation mechanism of HCSS-Co 3 O 4 @CuO-NiO is proposed based on a series of characterization results, which is crucial for the design and preparation of nanocatalysts with similar architectures. Benefiting from the optimized compositions and electronic structures, the best HCSS-Co 3 O 4 @CuO-NiO sample exhibits high catalytic activity in NH 3 BH 3 methanolysis with a turnover frequency of 67.1 min −1 , surpassing that of all the noble-metal-free catalysts in previous reports. A possible reaction mechanism of NH 3 BH 3 methanolysis is put forward based on the in-situ Fourier transform infrared spectrometer (FTIR) characterization and kinetic isotope effect (KIE) experimental results. This work supplies a novel avenue for developing cheap and robust catalysts towards NH 3 BH 3 methanolysis by tailoring the catalysts’ morphology to hollow core@shell structures.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Jianxian Li,Wenting Lin,Minglei Lu,Junwei Liao,Changsong Hu,Tiejun Wang
Efficient release of H 2 with negligible CO impurities from sustainable MeOH/H 2 O has become a promising goal for on-board hydrogen generator. However, hydrogen release kinetics still face challenges. In this work, the Cu/ZnO/CeO 2 catalyst with high density ultra-small Cu nanoparticles and abundant oxygen vacancies were prepared for intensifying hydrogen evolution in aqueous phase reforming of methanol (APRM). The optimized 55% Cu/ZnO/CeO 2 catalyst (Cu NPs of 3.8 nm, Cu loading of 55.89 wt%, oxygen vacancies of 2.316 × 10 15 spins g −1 ) exhibited an excellent H 2 evolution rate of 58.39 μmolg cat −1 s −1 even at low temperature of 210 °C, which was 2.1-fold enhancement than that of commercial Cu/ZnO/Al 2 O 3 catalyst. Characterizations and experiments revealed that ZnO/CeO 2 intensified the strong metal-support interaction (SMSI), which anchored the Cu NPs, generated abundant oxygen vacancies and adjusted electronic structure to form Cu 0 -Cu + -O v active sites for facilitating the kinetics of APRM.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Fang Yao,Xiao Li,Chao Wan,Lixin Xu,Yue An,Mingfu Ye,Zhao Lei
Bimetallic AgPd nanoparticles with various molar ratios immobilized on graphitic carbon nitride (g-C 3 N 4 ) were successfully synthesized via a facile co-reduction approach. The powder XRD, XPS, TEM, EDX, ICP-AES and BET were employed to characterize the structure, size, composition and loading metal electronic states of the AgPd/g-C 3 N 4 catalysts. The catalytic property of as-prepared catalysts for the dehydrogenation of formic acid (FA) with sodium formate (SF) as the additive was investigated. The performance of these catalysts, as indicated by the turnover frequency (TOF), depended on the composition of the prepared catalysts. Among all the AgPd/g-C 3 N 4 catalysts tested, Ag 9 Pd 91 /g-C 3 N 4 was found to be an exceedingly high activity for decomposing FA into H 2 with TOF up to 480 h −1 at 323 K. The prepared catalyst is thus a potential candidate for triggering the widespread use of FA for H 2 storage.
研究领域:
化学
·
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Zhenchao Luan,Yezhen Chen,Yifei Liu,Xianger Xia,Kunkai Ma,Junzhi Lin,Bing Geng,Hui Li
A novel waterborne aluminum pigment with bright color and excellent corrosion resistance was prepared. The aluminum pigment encapsulation carries out by vinyl sulfone reactive dye after introducing a vinyl-modified layer on the surface. As a typical vinyl sulfone reactive dye, C.I. Reactive Blue 19 (RB-19) can wrap flake aluminum powder and make its surface rich in hydrophilic groups . And the sulfonic acid group of RB-19 also makes it have favorable dispersibility in water. Furthermore, the coating layer composed of vinyl trimethoxysilane (VTMS) and vinyl sulfone reactive dyes can eliminate the hydrogen evolution phenomenon when they are immersed in strongly alkaline solution (5 wt %). This study provides a new strategy for the research of color aluminum pigment.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shi-Long Yang,Shi-Nuo Liu,Kang-Jian Du,Xiu-Cheng Zheng,Zhi-Kun Peng,Pu Liu
Simultaneously considering cost, safety and catalytic efficiency, the development of a cost-effective and high-performance catalyst is significant and challenging for controllable hydrogen release from ammonia borane (AB, NH 3 BH 3 ) hydrolysis. In this work, Ru ultrafine particles are evenly and firmly stabilized on wheat straw-derived porous carbon through a facile procedure. Specifically, attributed to the abundant co-doping of heteroatoms (namely, N and O) and suitable hierarchical porous structure of WSC-1.0 with large specific surface area (1000 m 2 g −1 ), which is prepared with a mass ratio of 1: 1 for K 2 CO 3 to the pre-carbonized biomass waste, as well as high dispersion (32.6%) of Ru ultrafine particles with an average size of 1.4 ± 0.3 nm, the optimal Ru/WSC-1.0 displays exceptional catalytic performance in the hydrolysis of AB. The corresponding turnover frequency (TOF) and specific reaction rate ( r B ) are 167.7 min −1 and 4.07 × 10 4 mL min −1 g Ru −1 , respectively, and the apparent activation energy is 40.94 kJ mol −1 . Upon adding NaOH (1.0 M), the hydrolysis rate can be remarkably accelerated (TOF = 401.4 min −1 , r B = 9.75 × 10 4 mL min −1 g Ru −1 ). The isotope experiments show that the scission of an O-H bond in H 2 O by oxidative addition is the decisive step in this reaction. Impressively, the effective “on-off” control for the hydrolytic dehydrogenation reaction over Ru/WSC-1.0 can be easily realized by introducing certain amounts of Zn(NO 3 ) 2 and EDTA-2Na, separately. Our work delivers a facile approach for efficient utilization of agricultural wastes and offers a robust and cost-effective catalyst for the controllable hydrogen evolution from AB hydrolysis.
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
Ceramics-Switzerland
·
2025
·Vol. 8
·期 1
·27
·
IF 2
Haining Geng,Qi Wei,Haosen Ma,Qiu Li
The expansion, cracking and deterioration of properties during utilisation and solidification of municipal solid waste incineration bottom ash are key problems that are caused by the reaction of metallic aluminium in the bottom ash in the highly alkaline environment of hardened Portland cement. In this study, polyaluminium sulphate (PAS) was introduced into ordinary Portland cement (OPC) to inhibit the corrosion of aluminium alloy. The results indicate that PAS successfully inhibited the corrosion of Al in hardened OPC paste, prevented the expansion and cracking, reduced the amount of hydrogen gas release and formed a thinner and dense corrosion layer on the Al plate surface. The mechanism of corrosion inhibition of Al by PAS was the increase of initial Al(OH)4−concentration by hydrolysis, which expanded the pH range of passivation and transformed the porous loose bayerite layer to a dense homogeneous one around the Al plate without modification of the corrosion product (bayerite). The corrosion rate of the Al alloy in hardened OPC paste was reduced by 213 times by the addition of PAS, from 288.30 mm a−1without PAS addition to 1.35 mm a−1with PAS addition. This study casts light on the effective inhibition of corrosion of the Al alloy in OPC.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yuling Ma,Xiaojing Li,Yun Zhang,Li Chen,Jiangtao Wu,Daojiang Gao,Jian Bi,Guangyin Fan
The release of hydrogen from chemical hydrides is of significant importance for practical applications. In this study, Ru nanoparticles supported on TiO 2 (B) nanotubes , designated as Ru/TiO 2 (B), were synthesized and applied as catalysts for hydrogen evolution from the catalytic hydrolysis of ammonia borane (AB) at 25 °C. Results indicate that Ru/TiO 2 (B) shows high catalytic activity in hydrogen evolution from the hydrolysis of AB with an activation energy of 45.6 kJ mol −1 and a turnover frequency number of 303 mol H 2 ·(mol Ru·min) −1 . The Ru/TiO 2 (B) exhibits a total turnover number of 15,377 in catalytic lifetime measurement in hydrogen generation from the hydrolysis of AB before deactivation. The kinetic studies show that the hydrolysis of AB catalyzed by Ru/TiO 2 (B) is a first-order reaction with respect to Ru concentration, whereas it is a zero-order reaction regarding the AB concentration. The high catalytic activity of Ru/TiO 2 (B) demonstrates that TiO 2 (B) nanotubes are suitable media for nanoparticle immobilization.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2018
·Vol. 10
·期 7
·1620-1626
·
IF 4.674
Wei Wang,Zhang-Hui Lu,Yan Luo,Aihua Zou,Qilu Yao,Xiangshu Chen
Graphical Dispersed Nanoparticles : Highly dispersed PdNi nanoparticles (NPs) have been successfully immobilized on mesoporous carbon nitride (MCN) through a facile co-reduction approach, which shows excellent catalytic performance for hydrogen release from an ammonia borane (AB) aqueous solution at room temperature. Highly dispersed Pd and PdNi nanoparticles (NPs) have been successfully immobilized on mesoporous carbon nitride (MCN) through a facile co-reduction approach. The resulting Pd/MCN catalyst shows excellent catalytic performance for hydrogen release from an ammonia borane (AB) aqueous solution with a turnover frequency (TOF) value of 125 mol H 2 mol metal −1 min −1 at room temperature, which is among the highest values for monometallic Pd-based catalysts reported to date. The catalytic performance of the Pd NPs can be further enhanced by alloying with Ni or Co atoms. Among all the synthesized Pd x Ni 100− x /MCN nanocomposites (NCs) with different Ni/Pd ratios, the Pd 74 Ni 26 /MCN catalyst exhibits the best catalytic performance with a TOF of 246.8 mol H 2 mol metal −1 min −1 . The high activity of Pd/MCN and Pd 74 Ni 26 /MCN are largely dependent on the features of the ultrafine metallic NPs immobilized by MCN, the interfacial interaction between the MCN matrix and metallic NPs, and the accessible open porous structure for mass transfer.
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
Inorganic Chemistry Frontiers
·
2017
·Vol. 5
·期 2
·370-377
·
IF 4.036
Zhujun Zhang,Shiliang Zhang,Qilu Yao,Gang Feng,Meihua Zhu,Zhang-Hui Lu
Metal–organic framework (MOF) immobilized Rh–Ni alloy nanoparticles (NPs) with a mean size of 2.8 nm have been facilely and successfully fabricated via a reduction rate controlled method. Bimetallic NP/MOF composites with uniform tiny RhNi alloy NPs immobilized on MOFs, high surface areas (1970 m2 g−1), and accessible porous structure have been obtained. The resulting RhNi/MOF catalysts show high catalytic activity and robust durability for complete H2 evolution from hydrazine borane (N2H4BH3) and hydrous hydrazine (N2H4·H2O). The optimized Rh0.8Ni0.2/MIL-101 catalyst exhibits excellent catalytic performance for the dehydrogenation of N2H4BH3 and N2H4·H2O in aqueous solution with 100% conversion and hydrogen selectivity, high total turnover frequencies (TOF), up to 1200 and 428.6 mol(H2) mol(Rh+Ni)−1 h−1, respectively, the highest over Rh-based catalysts. The high activity and prominent durability of Rh0.8Ni0.2/MIL-101 are highly dependent on the features of the MOF immobilized tiny RhNi alloy NPs, the strong interaction between the MOF crystal and RhNi alloy NPs, the optimized surface and electronic structure of RhNi alloy with an atomic ratio of 8 : 2, and the accessible open porous structure for free mass transfer.
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
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 20
·9723-9732
·
IF 8.867
Jiaguang Zheng,Xuezhang Xiao,Liuting Zhang,Shouquan Li,Hongwei Ge,Lixin Chen
A remarkable improvement in the hydrogen desorption performance of Mg(BH4)2–NaBH4 eutectic composite is achieved by simply ball-milling with fluorographene (FG). It is found that the desorption temperature of Mg(BH4)2–NaBH4 (∼200 °C) is still too high and liquid phase appears during dehydrogenation. Particularly, the novel bowl-like 3D Mg(BH4)2–NaBH4–FG composite can be formed after ball-milling. The novel Mg(BH4)2–NaBH4–FG exhibits a low dehydrogenation temperature of 114.9 °C with 6.9 wt% of pure hydrogen in seconds. In-depth investigations show that such greatly improved hydrogen desorption properties of the Mg(BH4)2–NaBH4–FG composite could be ascribed to both the “novel bowl-like 3D structure” with large specific surface area and the “reactant destabilized modification” owing to the decrease of the reaction enthalpy caused by the formation of NaMgF3. This finding provides a facile preparation of complex borohydride composites with low dehydrogenation temperature and fast rate, which accelerates its practical application in fuel cells.
研究领域:
材料科学
·
氢能存储
·
纳米技术
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Senliang Xi,Peng Zhang,Yuanyi Fu,Kudzaishe Caren Tome,Tonghuan Zhang,Shixue Zhou,Youmin Guo,Hao Yu
In this work, two kinds of zeolites MCM-22 and SAPO-34 were synthesized by the hydrothermal method. The mixture systems of NaBH4 and different mass percentages of zeolite were prepared by ball milling, with no reaction between NaBH4 and the zeolite during the process, as shown by X-ray diffraction analysis. Thermal decomposition of NaBH4 and NaBH4 + zeolite for hydrogen release was investigated by temperature-programmed desorption, differential scanning calorimetry, and pressure composition isothermal methods. It is shown that the presence of zeolites can decrease the hydrogen release temperature. In addition, in comparison to pure NaBH4, whose peak temperature of hydrogen release was 566.8 °C, the peak temperatures of NaBH4 + MCM-22 (1:1) and NaBH4 + SAPO-34 (1:1) decreased to 510.0 and 505.2 °C, respectively. Moreover, the addition of zeolite can improve the hydrogen release kinetics of NaBH4 and when catalyzed by MCM-22 and SAPO-34 can release 2.31 and 3.76 wt. % H2 in 15 h, respectively. Furthermore, SAPO-34 with the larger specific surface area had a better nanoconfinement effect to catalyze hydrogen release of NaBH4 than that of MCM-22.
研究领域:
材料化学
·
能源化学
·
纳米催化
·
储氢材料
·
物理化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Dawson Wai-Shun Suen,Yujie Yan,Eugene Yin-Cheung Wong,Xiao-Ying Lu,Jiajun Chen,Chi-Wing Tsang,Chunzhen Yang,Shaobo Ouyang
This study investigated the long-term stability of cobalt (Co) and manganese nitride (Mn 4 N) nanoclusters in the catalytic hydrolysis of a promising hydrogen (H 2 ) storage material, ammonia borane (H 3 NBH 3 ; AB), to release H 2 . It was previously found that Co nanoparticle/Co single-atom catalysts (Co NP/Co SACs) anchored on carbon nanotubes (CNT) exhibited excellent reactivity and stability towards AB hydrolysis and high performance in the H 2 evolution reaction in alkaline media. Therefore, the current study synthesised CoMn 4 N/Co-Mn-N x -CNT-200-800, a CoMn-based catalyst with Co and Mn 4 N nanocluster active sites, and examined its performance in AB hydrolysis. CoMn 4 N/Co-Mn-N x -CNT-200-800 generated three equivalents of H 2 from AB within 5 min, outperforming the catalytic activity of previously reported Co NPs/Co SACs. Moreover, CoMn 4 N/Co-Mn-N x -CNT-200-800 maintained over 90% of its initial activity after 50 cycles of AB hydrolysis. This exceptional long-term stability is attributable to CoMn 4 N/Co-Mn-N x -CNT-200-800 bearing Co/Mn 4 N nanoclusters that were strongly adhered onto graphitic layers, thereby preventing metal-atom aggregation and leakage during AB hydrolysis. Thus, CoMn 4 N/Co-Mn-N x -CNT-200-800 displayed a maximum effective H 2 generation rate of 8372 mL H2 ·g CoMn −1 ·min −1 . These results highlight the potential of dispersed bimetallic nanocluster catalysts, such as CoMn 4 N-based catalysts, for practical and sustainable H 2 generation via AB hydrolysis. In addition, the insights gained from this study can inform the design of highly active and stable non-precious metal-based catalysts for energy-related applications.
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
危险品化学品经营许可证（带存储）