NEW JOURNAL OF CHEMISTRY
·
2014
·Vol. 38
·期 10
·4656-4660
·
IF 3.159
Linli Tang,Jian Lv,Shaodong Sun,Xiaozhe Zhang,Chuncai Kong,Xiaoping Song,Zhimao Yang
An interesting morphology-evolution of Cu2O from cubic, edge-truncated cubic, edge- and corner-truncated octahedral, truncated octahedral, and finally to octahedral architectures was readily achieved by adjusting the concentration of hydroxyl. When evaluated for their photocatalytic performances, these polyhedral Cu2O crystals manifest shape-dependent properties.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 27
·70884-70896
·
IF 5.8
Li Ke,Zhu Yuqiu,Wang Zixuan,Chen Dingkai,Wu Wenwei,Luo Yongming,He Dedong
High concentration of H 2 S in acidic natural gas will lead to poisoning of catalysts for hydrogen production by methane steam reforming, thus limiting the further use of natural gas. Reforming CH 4 by H 2 S can be considered as an alternative route to hydrogen production from methane. This process not only achieves the removal of H 2 S but also obtains chemical raw material CS 2 and clean energy H 2 . By impregnating the Mo source on SiO 2 treated with hydrogen peroxide and then using the catalyst in the CH 4 /H 2 S reforming reaction, we surprisingly found that the conversion rate of CH 4 and H 2 S increased from 28 and 32% to 34% and 43%, respectively, after hydrogen peroxide treatment. The H 2 production rate and the yield of CS 2 increased from 20 mmolH 2 /(g Mo *min) and 52% to 30 mmolH 2 /(g Mo *min) and 65%, respectively. Combining with characterization methods such as X-ray diffraction (XRD), hydrogen temperature programmed reduction (H 2 -TPR), 1 H-based solid-state nuclear magnetic resonance ( 1 H MAS NMR), X-ray photoelectron spectroscopy (XPS), Raman spectra (RS), and transmission electron microscopy (TEM), we found that the hydroxyl concentration of the support increased after hydrogen peroxide treatment, which led to the strengthening of the force between the metal and the support, which was easy to form low-level and small-size MoS 2 , exposing more active sites, and further improving the catalytic activity. This method provides a new idea for hydrogen production by CH 4 /H 2 S reforming and the development of high-performance MoS 2 -based catalysts.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Ying Huo,Xuyu Wang,Zebao Rui,Xiaoqing Yang,Hongbing Ji
Insight into the relationship between catalytic trends and physicochemical properties of composite nanoparticles is essential for their rational design. Herein, a series of 3d-M (M = Mn, Fe, Co, Ni) metal hydroxide-promoted PtM(OH)x/Al2O3 catalysts are developed and well characterized for establishing the catalytic HCHO oxidation reactivity trend as a function of more fundamental properties, such as hydroxyl concentration and adsorption strength. The reactivity of PtM(OH)x/Al2O3 exhibits an increasing trend of Mn < Fe < Co < Ni, which is governed by their OH–M2+δ bond strength (Ni < Co < Fe < Mn) and surface hydroxyl concentration (Mn < Fe < Co < Ni). Both PtCo(OH)x/Al2O3 and PtNi(OH)x/Al2O3 exhibit a (>)95% HCHO conversion and (>)100 h performance stability at 30 °C with a low 0.2 wt % Pt loading amount. The identification of these catalytic trends provides foundations for composite active sites design for HCHO oxidation and other hydroxyl-involved reactions.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2015
·Vol. 23
·期 2
·489-495
·
IF 1.108
Pan Yani,Zhang Jingji,Xu Yu,Gao Yafeng,Chen Zhi,Wang Jiangying
Sulfonated mesoporous ZrO 2 was prepared by a facile one-pot hydrothermal process, using a mixture of ZrOCl 2 ·8H 2 O and sodium dodecyl sulfonate in a NaOH solution, and subsequent calcination of the inorganic/organic intermediate. The influence of NaOH concentration, hydrothermal and calcination temperature on the structural and textural properties of the final products was investigated. Increasing the NaOH concentration gave rise to the transformation from tetragonal to monoclinic and then to tetragonal phase, whereas the increase of hydrothermal temperature led to the tetragonal-to-monoclinic phase transformation. As the NaOH concentration and hydrothermal temperature were increased, a narrow pore size distribution was turned into a multi-modal pore size distribution resulting from regular mesopores and interparticle voids. Accordingly, the incorporated sulfonate anions were oxidized into sulphate anions. After the calcination of 550 °C, the sulfonated products possessed tetragonal crystalline phase with average pore diameter of 4.2 nm and surface area of 108 m 2 g −1 .
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
危险品化学品经营许可证（带存储）