APPLIED CATALYSIS A-GENERAL
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2011
·
IF 3.384
Baosong Fu,Xiaowen Zhu,Guomin Xiao
High activity ultrafine Pd catalyst was synthesized by both functional polymer encapsulated and impregnation methods. Catalysts were characterized and used to catalyze solvent-free aerobic toluene oxidation. Reaction temperature, time, catalyst mass, air pressure and catalyst reusability were investigated. Catalyst synthesized by encapsulating and immobilizing Pd inside titanium oxide is more active and has a better reusability.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2020
·
IF 2.029
Chunhui Yue,Pan Yang,Jingchuan Wang,Xiaochong Zhao,Yuqi Wang,Lijun Yang
Development of low-cost and high-efficiency catalysts for hydrogen generation represents the significant challenge for realizing hydrogen economy. NiCo and nano-Pd loaded NiCo microfibers with high surface area has been successfully developed by electrospinning and following vacuum thermal treatment. Towards hydrogen generation, the catalyst exhibits efficient TOF as high as 350 and 680 mL min −1 gcat −1 for NiCo and nano-Pd loaded NiCo microfibers, providing superior performance compared with the most promising reported catalysts. The excellent catalytic activity remain above 90% confirming the remarkable durability. The insights uncovered here inspire and guide the rational design of advanced catalysts for the rapidly developing hydrogen energy applications.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
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2024
·
IF 1.7
Gao Xinglong,Qiu Feifei,Xie Hongzhao,Chen Xiaopeng,Wu Chenghong,Chen Yutong,Liang Jiezhen,Wang Linlin
In the present work, efficient catalytic hydrogenation of acrylic rosin (AR) were extensively investigated. Qualitative and quantitative analysis of AR and hydrogenated acrylic rosin (HAR) were carried out by GC and GC–MS, and the reaction pathway network about catalytic hydrogenation of AR was constructed. In addition, a Pd/C catalyst with well-dispersed ultrafine nano-palladium was prepared by impregnation method using Pd(NO 3 ) 2 ·2H 2 O precursor and put into use for the catalytic hydrogenation of AR. The structural properties of the catalyst were measured via XRD, TEM, ICP-OES, XPS, and BET. The characterizations showed that the ultrafine Pd nanoparticles (NPs) with an average Pd NPs size of 2.29 nm and consisting of 3.1% Pd were equably loaded on the surface of activated carbon. Benefiting from well-dispersed ultrafine Pd NPs, the catalyst exhibits outstanding activity in the hydrogenation of AR at 180 °C and 5 MPa, which shows 1.9 times superior activity than a commercial 10% Pd/C. The quality of prepared HAR is similar to the commercial HAR (Gardner color < 1, acid value of 235 mg KOH/g, softening point of 129 °C, 35% conversion rate of acrylpimaric acids). Graphical abstract
研究领域:
化学工程
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催化材料科学
✓ 已验证
DOI
高影响因子
Catalysts
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2016
·Vol. 6
·期 7
·100
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IF 2.964
Chi Zhang,Wenrong Cao,Hongye Cheng,Lifang Chen,Zhiwen Qi
The size of metal particles is an important factor to determine the performance of the supported metal catalysts. In this work, we report subnanometer Pd clusters supported on zirconia by the microwave-assisted hydrothermal method. The presence of subnanometer Pd clusters on the zirconia surface was confirmed by two-dimensional Gaussian-function fits of the aberration-corrected high-angle annual dark-field images. These subnanometer Pd catalysts exhibit high catalytic performance for the hydrogenation of biomass-derived succinic acid to γ-butyrolactone in water and avoid the formation of overhydrogenated products, such as 1,4-butanediol and tetrahydrofuran. The catalyst with an ultra-low Pd loading of 0.2 wt. % demonstrated high selectivity (95%) for γ-butyrolactone using water as a solvent at 473 K and 10 MPa. Moreover, it can be reused at least six times without the loss of catalytic activity, illustrating high performance of the small Pd clusters.Keywords:succinic acid hydrogenation;aqueous phase;subnanometer;Pd catalyst
研究领域:
催化化学
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生物质能转化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Xue Zhao,Xiuxiu Jia,Haibo Zhang,Xiaohai Zhou,Xiao Chen,Huaisheng Wang,Xun Hu,Jian Xu,Yingtang Zhou,Hucai Zhang,Guangzhi Hu
Electrochemical nitrate reduction reaction (NIRR) driven by sustainable energy is not only expected to realize the green production of ammonia under ambient conditions, but also a promising way to purify nitrate wastewater. The ammonia yield rate and Faradaic efficiency of NIRR catalyzed by Pd10Cu/BCN constructed with structural constraints and pre-embedded reducing agent strategies were as high as 102,153 μg h −1 mg cat. −1 and 91.47%, respectively. Pd10Cu/BCN can remove nearly 100% of 50 mg L −1 NO 3 - without NO 2 - residue within 10 h, and the realization of this effect does not require the participation of any chloride. Control experiments and DFT calculations explain the efficient operation mechanism of NIRR on Pd10Cu/BCN, where the Pd and CuN4 sites play the role of synergistic catalysis. Compared with the reported literature, Pd10Cu/BCN with good biocompatibility has become an outstanding representative of NIRR catalyst, which provides an alternative way for the green production of ammonia and the purification of nitrate wastewater.
研究领域:
环境科学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
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2024
·Vol. 14
·期 7
·424
·
IF 3.8
Mingyue Liu,Gang Chen,Zhenjun Song,Zhicai He,Aiguo Zhong,Mei Cui
Catalytic dechlorination of organic chlorides by palladium (Pd) with HCOOH represents one of the most effective and promising techniques for environmental remediation. In this study, we adopted alkaline-modified porous natural sponge as support of a Pd nanocatalyst (Pd@M-Sponge) and HCOOH as a hydrogen source for the hydrodechlorination of florfenicol (FF),o-chlorophenol (o-CP), andp-chlorophenol (p-CP). Favorable conversion efficiency of FF,o-CP, andp-CP was achieved at 25 °C and atmospheric pressure attributed to the small diameter and high catalytic reactivity of the prepared Pd NPs, in addition to the slight internal mass transfer limitation of the prepared Pd@M-Sponge. High reaction rate constants were obtained even in the conditions of a low molar ratio of HCOOH top-CP (10:1) and a high concentration ofp-CP (500 mg/L). The prepared catalyst also demonstrated superior recyclability without any obvious decrease in catalytic reactivity in 20 successivep-CP dechlorination cycles. This work provides an ideal recyclable and cost-effective catalyst based on renewable and biocompatible natural material for the catalytic hydrodechlorination of chlorinated organic pollutants with formic acid and a new view for the exploration and designing of highly reactive and stable catalysts for hydrodechlorination.
研究领域:
环境科学
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催化
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2018
·
IF 3.974
Zhuyu Niu,Yating Jia,Yuancai Chen,Yongyou Hu,Junfeng Chen,Yuancai Lv
This study constructed a biological-inorganic hybrid system including Pseudomonas putida ( P. putida ) and bioreduced Pd (0) nanoparticles (NPs), and inspected the influence of bio-nano Pd (0) on the direct electron transfer and phenol biodegradation. Scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDX) showed that bio-nano Pd (0) (~10 nm) were evenly dispersed on the surface and in the periplasm of P. putida . With the incorporation of bio-nano Pd (0), the redox currents of bacteria in the cyclic voltammetry (CV) became higher and the oxidation current increased as the addition of lactate, while the highest increase rates of two electron transfer system (ETS) rates were 63.97% and 33.79%, respectively. These results indicated that bio-nano Pd (0) could directly promote the electron transfer of P. putida . In phenol biodegradation process, P. putida -Pd (0)− 2 showed the highest k (0.2992 h −1 ), μ m (0.035 h −1 ) and K i (714.29 mg/L) and the lowest apparent K s (76.39 mg/L). The results of kinetic analysis indicated that bio-nano Pd (0) markedly enhanced the biocatalytic efficiency, substrate affinity and the growth of cells compared to native P. putida . The positive effects of bio-nano Pd (0) to the electron transfer of P. putida would promote the biodegradation of phenol.
研究领域:
环境科学
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微生物学
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纳米技术
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生物催化
✓ 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）