Interdisciplinary Materials
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2024
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IF 24.5
Mingwei Wang,Zhiyi Hu,Jieheng Lv,Zhiwen Yin,Zhewei Xu,Jingfeng Liu,Shihao Feng,Xiaoqian Wang,Jiazhen He,Sicheng Luo,Dafu Zhao,Hang Li,Xuemin Luo,Qi Liu,Damin Liu,Baolian Su,Dongyuan Zhao,Yong Liu
Compositions and morphologies of Pt-based electrocatalysts have great impact on the electrocatalytic activity and stability of oxygen reduction reaction (ORR). Herein, we report a novel design of one-dimensional (1D) Pt–Pd dendritic nanotubular heterostructures (DTHs) by controlling the degree of Pt 2+ -Pt reduction reaction and Pd-Pt galvanic replacement reaction with uniform Pd nanowires as sacrificial templates. The obtained Pt–Pd bimetallic DTHs catalyst exhibited uniform and dense Pt dendritic nanobranches on the surface of 1D hollow Pt–Pd alloy nanotubes, possessing superior catalytic activity for ORR compared to state-of-the-art commercial Pt/C catalysts. Typically, the Pt 4 Pd DTHs catalyst showed efficient mass activity (MA, 1.05 A mg Pt −1 ) and specific activity (SA, 1.25 mA cm Pt −2 ) at 0.9 V (vs. RHE), and the catalyst exhibited high stability with 90.4% MA retention after 20 000 potential cycles. The Pt–Pd bimetallic DTHs configuration combines the advantages of 1D hollow nanostructures and dense Pt dendritic nanobranches, which results in rich electrochemical active surface sites, fast charge transport, and multiple dendritic anchoring points contact on carbon support, thus boosting its catalytic activity and stability towards electrocatalysis.
研究领域:
材料科学
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电化学
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纳米技术
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催化
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
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2023
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IF 2.8
Zhang Yakun,Xu Lin,Wang Wen,Wu Qing,Zhang Yi
The efficient conversion of ethane has attracted more and more attention because of the shale gas revolution. The coupling of ethane dehydrogenation (EDH) and benzene alkylation over the 1.5Pt/HZSM-5 realize high activity close to the thermodynamic equilibrium of EDH at 500 ℃ and 0.9 bar ethane partial pressure. Meanwhile, the coupled reaction shows long-term stability during 22 h with a slightly decreased ethane conversion of 0.03% per hour and as high as 42% selectivity of ethylbenzene. Based on various characterization, including XRD, HR-TEM, NH 3 -TPD, Py-IR, TGA, it is confirmed that the coupling reaction could convert ethylene, formed by EDH over Pt sites, to ethylbenzene via benzene alkylation over Brönsted acidic sites (BAS) subsequently, and suppressing the sintering of Pt species and coke deposition induced by aromatization and deep dehydrogenation, resulting in high activity and long-time steady state. Graphical Abstract
研究领域:
化学工程
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
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2017
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IF 0.736
Hongcheng Peng,Weihong Qi,Wenhai Ji,Siqi Li,Jieting He
Combining the bond-energy model and Debye theory, we generalized the Gibbs free energy model for Cu–Pt nanoparticles (NPs) by introducing a shape factor considering the shape effect. We studied the structural stability of the Cu–Pt NPs and plotted the corresponding composition-, shape- and size-dependent phase diagrams. It is shown that the Cu–Pt NPs can form alloyed structure in a large size range. But when the particle size continues to decrease, the NPs will form the core–shell structure due to surface segregation. Meanwhile, the composition segregation could make the atoms of less-content element to gather in the surface. The predictions from the present calculated phase diagrams are consistent with a series of experimental results in literatures. To further prove the efficiency of the phase diagrams, we synthesized the alloyed Cu–Pt NPs of 4–15 nm by a co-reduction method, which is in agreement with the predictions from the phase diagrams.
研究领域:
材料科学
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纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jinghu Chen,Mingming Wang,Shude Zhang,Yaju Wang,Jingfeng Hua,Xiangtong Meng,Qineng Xia,Jieshan Qiu,Shaomin Liu
Glycerol hydrogenolysis to 1,3-propanediol (1,3-PDO) is of significance in promoting the biomass valorization. To achieve the efficient conversion, the selective activation of the secondary C–O bonds in the glycerol is vital. In this work, we comparatively investigated the catalytic performances of Pt/Nb 2 W 3 O 14 catalyst for glycerol hydrogenolysis controlled at the reacting conditions of 140 °C and 40 bar. Compared to Pt/WO 3 and Pt/NbO x , the space–time yield (STY) of 1,3-PDO over Pt/Nb 2 W 3 O 14 catalyst can be improved by a factor of 13, reaching 596.4 mg g cat −1 h −1 . The cation ordering of Nb and W on atomic-scale were fully synergized their unique advantages, showing preferential adsorption of the secondary C–O bond under in-situ DRIFTS tracking. The prepared Nb 2 W 3 O 14 is a tetragonal tungsten bronze (TTB) type complex oxides which can effectively promote the dispersion and reduction of Pt nanoparticles. Such strong interaction between Nb 2 W 3 O 14 and Pt can coordinate the precise adsorption and activation of the secondary C–O bond, simultaneously triggering subsequent hydrogenation. Pt/Nb 2 W 3 O 14 affords an ultrahigh activity in glycerol hydrogenolysis to produce 1,3-PDO, tripling the record productivity that was previously reported of these Pt-W based catalysts. This study reported the development of highly synergistic catalyst based on efficient and selective activation of the secondary C–O bond, which can be extended to catalyst design for other biomass valorization.
研究领域:
催化化学
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生物质转化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Jiawei Zhang,Yuying Dang,Wei Wang,Haijuan Zhan,Xudong Song,Baojun Ma
g-C 3 N 4 has great potential as metal-free and low-cost photocatalyst . However, its efficiency of photo-excited carriers separation is very low, it needs large amount of Pt (such as 3.0%) to resolve this problem. Here, we designed composite co-catalyst (Pt/MoP) and prepared (Pt/MoP)/g-C 3 N 4 . The optimal activity of (Pt/MoP)/g-C 3 N 4 reaches 531.75 μmol/h/g with 1.0% Pt. Compared with 3.0%Pt/g-C 3 N 4 , the activity of (Pt/MoP)/g-C 3 N 4 increased 2 times, whereas the amount of Pt is reduced 3 times. Photoelectrochemistry , surface photovoltage (SPV) and transient photovoltage (TPV) spectra prove (Pt/MoP) can effectively separate photo-excited carriers, thereby improve photocatalyst activity of g-C 3 N 4 . Here, MoP acts as electron storage due to the large capacitance, and Pt acts as proton reduction sites. This article gives a method to effectively reduce the amount of noble metal in photocatalysts.
研究领域:
材料科学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
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2017
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IF 3.33
Juanjuan Liu,Shihui Zou,Linfang Lu,Hongting Zhao,Liping Xiao,Jie Fan
Pt nanoparticles supported on anatase TiO 2 is an efficient and stable catalyst for room-temperature selective oxidation of benzyl alcohol under base-free aqueous conditions with ambient air as the oxidant. The result shows that the anatase content of support has a big influence on the activity of Pt/TiO 2 . Higher anatase content results in better performance, with optimal activity for Pt/anatase TiO 2 of 76.7 ± 1.5% in conversion and nearly 100% in selectivity to aldehyde within 10 h. Moreover, a quasi-linear relationship between anatase content of the support and the activity of Pt/TiO 2 is observed.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Dan Yu,Yufei Feng,Jing Jin,Qian Liu,Lu Tao,Junshuang Zhou,Li Hou,Faming Gao
A bstract One-dimensional (1D) Pt-based nanotubes (NTs) are widely studied as a promising class of ORR electrocatalysts . A rational porosity for wall of nanotubes could lead to higher atomic utilization and better mass transportation. To confirm this speculation, we prepare a novel class of PdPt porous nanotubes with sub-nano Pt-shell. Their ESCA of 95 m 2 g −1 and mass activity of 2.29 A mg Pt −1 are distinctly greater than that of the Pt nanotubes with perfect wall (91.45 m 2 g −1 and 2.09 A mg Pt −1 ), and are 14.3 and 9.6 times higher than those of commercial benchmark Pt/C catalyst, respectively. The prolonged electrocatalytic durability is also shown. The improved performance can be ascribed to a combination of alloying and unique geometry (one dimension and nanotubes with porous walls).
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
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2022
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IF 6.796
Xiao Chen,Yong Wang,Jianyu Li,Zhongheng Hu,Ying Zhou,Huayan Liu,Hanfeng Lu
The preparation of highly active supported noble metal catalysts with a low noble metal loading has always been the ultimate goal of researchers working on catalysis. Hydrothermally treated Pt/Al 2 O 3 (Pt/Al 2 O 3 -H) exhibits better catalytic activity than that (Pt/Al 2 O 3 -C) treated via the conventional calcination approach. At the high space velocity of 100,000 mL/(g∙hr), the temperature that correspond to 50% toluene conversion ( T 50 ) of Pt/Al 2 O 3 -H is 115°C lower than that of Pt/Al 2 O 3 -C, and the turnover frequency (TOF) value can reach 0.0756 sec −1 . The mechanism by which the hydrothermal approach enhances Pt/Al 2 O 3 activity has been investigated. The structure associated with the high catalytic activity of Pt nanoparticles (NPs) can be retained via hydrothermal treatment. Furthermore, the support is transformed to AlO(OH) with numerous surface hydroxyl groups, which in turn can facilitate the adsorption of toluene. And the synergistic effects of Pt NPs and AlO(OH) increases the contents of Pt in oxidation state and active oxygen, which are beneficial for toluene oxidation.
研究领域:
催化化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
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2025
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IF 13.1
Zhitong Zhou,Weixiang Guan,Xiaoli Pan,Aiqin Wang,Tao Zhang
One-pot amination coupling of vicinal diols toward the synthesis of pyrazines provides an efficient and economically viable route to access N-heterocycles from biomass, yet the current methodology relies on a fragile homogeneous catalyst system, which limits the sustainability of the chemistry. In this work, we developed a highly efficient heterogeneous catalyst 0.8Pt/13CeO2/Al2O3 which afforded diverse substituted pyrazines from readily available vicinal diols and ammonia with a yield up to 94% under mild reaction conditions and could be reused at least 6 times without obvious activity decay. Compared to the Pt/Al2O3 catalyst, the 0.8Pt/13CeO2/Al2O3 catalyst exhibited a 30-fold faster conversion rate of diols and an increased pyrazine selectivity from 48% to 79%. Characterizations revealed that doped CeO2 improved the dispersion of Pt, increased the electron density on the Pt sites, optimized the acid/basic property of the catalyst, and enhanced the adsorption strength and dehydrogenation ability of diols. All these features contributed to the increased activity and selectivity.
研究领域:
化学工程
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催化化学
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生物质利用
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2024
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IF 4.6
Ai-Ping Yan,Yu-Jue Qiu,Xing-En Wang,Guang-Hua Wang,Xian-Kui Wei,Xin-Tian Li,Xiao-Die Chen,Xing Shang,Shun-Liu Deng,Jian-Wei Zheng,Su-Yuan Xie
C 3 N 4 is widely applied in the synthesis of single-atom catalysts. However, understanding on the active site and the reaction mechanism is not fully in consensus. Especially, bare studies have considered the coordination environment of the single-atomic dopant and the effect of nitrogen vacancy on C 3 N 4 . In this study, we found that the presence of nitrogen vacancies promotes the activation of water and reduces the activation energy barrier for hydrogen generation. The results show that a synergistic effect between single-atom Pt and nitrogen vacancies enables the catalyst to achieve a superior hydrogen production rate of 3,890 μmol/g/h, which is 16.8 times higher than that of pristine C 3 N 4 . Moreover, the catalyst is also applicable for photocatalytic hydrogen production from seawater without significantly decreased hydrogen production rate. This study paves the way for the rational design and optimization of next-generation photocatalysts for sustainable energy applications, particularly in solar-driven hydrogen production.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
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2015
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IF 6.196
Li-Mei Zhang,Zhen-Bo Wang,Jing-Jia Zhang,Xu-Lei Sui,Lei Zhao,Da-Ming Gu
A novel nitrogen-doped carbon material with honeycomb-like mesoporous structure was synthesized via carbonization of polyaniline under template and acted as support for the Pt catalyst. Pyrolysis temperature plays a significant role in enhancing electrochemical performance of Pt/mesoporous nitrogen-doped carbon (Pt/MNC) catalyst. Considering comprehensively electrocatalytic activity and stability for methanol electrooxidation, MNC-900 (MNC prepared at pyrolysis temperature of 900 °C) is an appropriate support for Pt catalyst. Moreover, the electrochemical performance of Pt/MNC-900 catalyst is significantly superior to that of Pt/mesoporous carbon (Pt/MC) catalyst. The enhancement is attributed to N species introduced to the support and optimal proportion of pyridinic N, pyrrolic N and graphitic N. When the contents of pyridinic N, pyrrolic N and graphitic N achieve optimal proportion, MNC support reveals not only intense anchoring effect of Pt nanoparticles but also enhanced electric conductivity , further improving electrocatalytic activity and stability of the catalyst.
研究领域:
材料科学
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电化学
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催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2023
·
IF 2.8
Chunzheng Wu,Ling Fang,Fangjie Ding,Genxiang Mao,Xiaogu Huang,Shun Lu
Ultra-small Pt nanoparticles loaded on TiO 2 through in-situ photo-deposition for H 2 production via photo reforming of wastepaper was prepared in this study. The effect of noble metal cocatalyst, Pt loading, content of paper (e.g., napkin), and concentration of NaOH was investigated. Consequently, a highest H 2 production rate of 614.7 µmol/g/h was achieved in the optimum condition. It was found that both the solid paper and the dissolved part in the NaOH solution could scavenge the photo-generated holes and contribute to H 2 production. Our research provides a potential route for the reuse of wastepaper to produce clean fuel.
研究领域:
环境科学
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能源科学
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材料科学
✓ 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）