ENERGY & FUELS
·
2025
·
IF 5.3
Qiulin Ye,Dongdong Wang,Jiabao Lv,Minghui Tang,Angjian Wu,Yaqi Peng,Shengyong Lu
The electrocatalytic CO2 conversion offers a sustainable pathway for generating ecofriendly chemicals and fuels while simultaneously enabling the storage of intermittent renewable energy. Herein, CuPd bimetallic catalysts were specifically designed through displacement reaction, with a magnetron sputtering Cu film as a substrate. The optimized CuPd catalyst achieved an ethylene Faradaic efficiency (FE) of 51.07% and a C2+ FE of 82.18% at a 200 mA/cm2 current density. In situ Raman spectroscopy indicates that the CuPd electrode exhibited a high local surface pH during the CO2 reduction reaction, which was favorable for C–C coupling. The observation of the *OCCOH intermediate by in situ FTIR, combined with density functional theory calculations, confirms that the CuPd surface promotes C–C coupling instead of direct hydrogenation. This mechanistic insight explains why the addition of Pd enhances the selectivity for C2+ products.
研究领域:
电催化
·
材料科学
·
可持续能源
·
表面化学
·
二氧化碳利用
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产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 16
·期 1
·
IF 4.3
Yu Zhang,Ying Xin,Lizheng Tang,Shihao Cui,Hongling Duan,Qingshan Zhao
The selective hydrogenation of phenol to cyclohexanone is a pivotal reaction for producing nylon precursors. Conventional Pd/C catalysts, however, suffer from weak metal–support interactions, leading to size heterogeneity and agglomeration of Pd nanoparticles, which degrades their activity and stability. Herein, we report a facile argon plasma treatment to engineer rich defects on an activated carbon (AC) support, resulting in a highly dispersed and stable catalyst (denoted as PL-Pd@ACAr). Characterization results indicate that the abundant carbon defects in PL-Pd@ACArenhance the anchoring of Pd precursors, ensure the uniform dispersion of Pd nanoparticles, and effectively modulate their electronic structure. Consequently, the plasma-enabled PL-Pd@ACArcatalyst achieves 99.9% phenol conversion with 97% selectivity to cyclohexanone at a mild temperature of 70 °C and maintains exceptional stability over six consecutive cycles. This work provides a robust and efficient strategy for the surface engineering of carbon supports to design high-performance hydrogenation catalysts.
研究领域:
催化化学
·
材料科学
·
化学工程
·
绿色化学
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产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ling Shi,Zefeng Wang,Xianlan Chen,Guangming Yang,Wei Liu
The synthesis of noble metal nanoparticle with controlled shapes is an attractive goal in developing highly active catalysts. However, constructing high-quality noble metallic nanocatalysts with good electrocatalytic activity remains a huge challenge to date. In this research work, the high-quality polyaniline functionalized graphene nanosheets (PANI/GNS) were prepared by an interfacial polymerization method. The abundant -NH2 groups onto the surface of resulted PANI/GNS nanocomposites, and can be used as active site for growing high load rate of Pd nanoparticles (NPs). Subsequently, Pt NPs were successfully deposited on the Pd surface formed Pt-Pd/PANI/graphene nanosheets (Pt-Pd/PANI/GNS) composites. Interestingly, the shape of Pt-Pd bimetallic can be effectively controlled by simply changing the reaction parameters. The shape and structure of nanocatalysts were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrocatalytic properties of nanocomposites were characterized by cyclic voltammetry (CV). The TEM images show that the Pt-Pd nanoflowers were successfully decorated onto the surface of PANI/GNS nanocomposites. The electrocatalytic properties for dioxygen and methanol of prepared Pt-Pd/PANI/GNS nanocatalyst were investigated. The electrochemical results show that the nanocatalysts exhibit higher electrocatalytic activity for methanol oxidation and dioxygen reduction.
研究领域:
材料科学
·
能源化学
·
纳米技术
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 162
·期 6
·H415
·
IF 3.266
Mingshu Xiao,Xiaocai Liang,Weiwei Li,Yang Yang,Yuqing Miao
Here, the ultrafine Pt/Pd bimetallic nanoparticles (Pt/Pd NPs) were synthesized and decorated on the multi-walled carbon nanotubes (MWCNTs) modified glassy carbon electrode (GCE) for hydrogen evolution. Pt/Pd NPs were synthesized through the reduction of their metal salt mixture with tert-butylamine as reductant and polyvinylpyrrolidone as protectant. Under the observation of transmission electron microscopy (TEM), the well dispersed Pt/Pd NPs exhibit the ultrafine size of about 13 nm diameter with the good crystallinity corresponding to the (111) planes of face-centered cubic (fcc) Pt and the (200) planes of fcc Pd. The scanning electron microscopy (SEM) also shows the dispersion and anchor of Pt/Pd NPs in the matrix of MWCNTs. Electrochemical study confirms the good electrocatalytic hydrogen evolution of Pt/Pd-MWCNT in 0.5 M H2SO4, exhibiting a potential application in the future for hydrogen based energy transformation and storage.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2019
·Vol. 43
·期 8
·3284-3294
·
IF 3.343
Xiaoyang Wan,Xuefeng Wei,Juan Miao,Ruichang Zhang,Jun Zhang,Qingshan Jason Niu
Summary A wide compositional range of Pd-Ni/Cd on polypyrrole (PPy)-modified Ti plates (Pd-Ni/Cd/PPy/Ti) was fabricated via electrochemical deposition. The hydrogen absorption properties of the prepared Pd-Ni/Cd/PPy/Ti electrodes were evaluated using cyclic voltammetry and chronoamperometry in acidic media. The optimal Pd 36 -Ni 7 /Cd 57 /PPy/Ti electrode achieved a hydrogen storage capacity of 331.3 mC cm −2 mg −1 and an H/Pd ratio of 0.77. The enhancement of the hydrogen storage was attributed to a synergistic effect between the Pd-Ni/Cd catalysts. The surface morphology, crystallinity, and chemical composition of the Pd-Ni/Cd/PPy/Ti electrode were characterized using scanning electron microscope (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), respectively. Hydrogen spillover occurred on the trimetallic catalysts, and secondary hydrogen spillover occurred on the PPy/Ti support. The enhanced hydrogen sorption capacity was due to both the synergistic effect of the trimetallic catalysts and the assistance of PPy, making Pd-Ni/Cd/PPy/Ti a promising hydrogen storage material.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Huan Zhang,Kai Cai,Pan Wang,Zhao Huang,Jiawei Liu,Long Wu,Mohamed F. Foda,Heyou Han
By using graphene oxide (GO) as the stabilizing and dispersing agent in aqueous solution at room temperature, Pd-based (PdTe, PdPtTe, and PdAuTe) nanotubes (NTs)/GO nanocomposites were readily prepared. The obtained GO-supported one-dimensional (1D) Pd-based NTs have relatively uniform morphology and good dispersity. The catalytical properties of PdAuTe NTs/reduced GO (rGO) nanocomposites with different metal ratios were systematically investigated after electrochemical reduction process. Pd47Au33Te20 nanotubes/rGO nanocomposites possess the optimal mass activity (5.31 mA ug–1Pd), which is 5.16-fold that of commercial Pd/C catalyst. The study provides a new strategy for clean synthesis of Pd-based NTs/GO nanocomposites, which are efficient catalysts for ethanol electrooxidation. It will probably inspire more appropriate utilization of graphene to design new hybrid materials with better properties applied in fuel cells or other related fields.
研究领域:
材料科学
·
电化学
·
催化科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Ran Zhang,Liye Zhu,Xuan Liu,Jiayin Zhu,Yan Zhao
Owing to the increasing energy demands, direct small-molecule fuel cells, such as ethanol and formate fuel cells, have attracted great attention. During the operation of the fuel cell, noble metal catalysts are widely used to accelerate the reaction kinetics by alloying with other materials. However, there are a few facile methods for improving elemental metal catalytic activity. In this work, the defect-rich palladium (Pd) aerogels are acquired by laser ablating technology, which can significantly improve the intrinsic activity of Pd elementary catalysts through introducing defects and lattice strain. The electrochemical results show that the mass and specific activities of the obtained Pd aerogel for the formate oxidation reaction are 2.26 and 1.99 times higher than those of the commercial Pd/C. The excellent activity and stability of the Pd aerogel for ethanol oxidation reaction have also been demonstrated. The effect of the compressive strain is further investigated by density functional theory (DFT) calculations. It has been found that the compressive strain weakens the adsorption strength of the intermediates, which can facilitate the desorption of toxic specifics. The laser-assisted synthesis of defect-rich aerogel paves a way in optimizing the structure of the elemental metal catalysts and improving their intrinsic catalytic activity.
研究领域:
材料科学
·
电化学
·
催化
·
燃料电池
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DOI
高影响因子
Catalysis Science & Technology
·
2018
·Vol. 8
·期 7
·1858-1866
·
IF 5.365
Qingjie Meng,Jiajia Liu,Xiaole Weng,Pengfei Sun,Jawwad A. Darr,Zhongbiao Wu
Noble metals, e.g. Pd, are often made into hybrid or composite catalysts (with less expensive materials) to oxidize industry-source emitted volatile organic compounds (VOCs) at low temperatures. In general, the loadings of these metals should be optimized to reduce costs whilst maintaining activity. There exists the possibility to obtain highly active catalysts with low loadings of noble metals by properly tuning the valence state of the metal(s). However, the relationship between the valence state and its effect on catalyst performance is still a matter of debate. In this article, we used supercritical water (sc-H2O), in the presence of oxidizing or reducing gases, as a feasible reaction medium to synthesize Pd/NiO hybrid nano-catalysts and in situ modify the valence state of Pd. After subjecting the catalysts to a range of analytical techniques, including XRD, H2-TPR, DRIFT, TPSR, etc., we unveiled that Pd0 is more active than PdOx and metal oxides in the catalytic oxidation of toluene. This is mainly because the stabilized Pd0 is capable of activating gaseous oxygen (and toluene) at low temperatures and returning to the original state by toluene even with excess oxygen. Although PdOx could desorb active oxygen under a reducing atmosphere and might assist in the oxygen spillover from NiO, it is difficult to convert into Pd0 in an oxygen-rich environment. The developed Pd0-dominated catalyst was found to be robust and highly active after an ageing test with and without water vapour.
研究领域:
催化化学
·
环境科学
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DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 63
·33347-33354
·
IF 3.708
Tieyong Xu,Qunfeng Zhang,Dahao Jiang,Qiuxia Liang,Chunshan Lu,Jie Cen,Xiaonian Li
Sulfur deactivation is a serious problem which largely limits the industrial application of noble metals as catalysts. Here we report a thermal oxidation method to regenerate sulfone poisoned Pd/C catalyst applied in the hydrogenation of sodium-m-nitrobenzene sulfonate (SNS). It was found that the initial activity of Pd/C catalyst could be substantially recovered after treating it in air at temperatures as low as 100 °C. And the catalyst could be reused for at least 20 times without the significant loss of activity. The properties of deactivated and regenerated catalysts were studied in detail by BET measurement, X-ray photoelectron spectroscopy (XPS), temperature programmed desorption (TPD), and Fourier transform infrared spectroscopy (FT-IR). The results indicated that the main surface sulfur species found on deactivated and regenerated Pd surfaces were Sn and sulfate (SO4), respectively. The change of the valence of sulfur species was found to be the key factor influencing the catalytic activity of the Pd-based catalyst.
研究领域:
化学工程
·
催化科学
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2020
·
IF 5.006
Caoping Yang,Kaijie Li,Junyou Wang,Shenghu Zhou
Pd nanoparticles (NPs) encaged hollow mesoporous silica nanoreactors (Pd@HMSNs) are prepared for hydrogenations of phenol, cresols and chlorophenols to cyclohexanone derivatives. Pd@HMSNs feature ∼ 4 nm Pd NPs in ∼ 16 nm hollow cavities of ∼ 30 nm HMSNs. Such Pd@HMSNs are highly thermally and catalytically stable. At mild reaction conditions, Pd@HMSNs efficiently catalyze hydrogenations of phenol and m -cresol to cyclohexanone derivatives with ≥ 98.3 % selectivity at ≥ 99.0 % conversions. Hydrogenations of o - and m -chlorophenol over Pd@HMSNs give cyclohexanone with ≥ 97.3 % selectivity at 100.0 % conversions, demonstrating a beneficial effect of such HMSNs for consecutive reactions. The confinement of Pd NPs inside hollow cavities of mesoporous nanoreactors greatly promotes collision times of reactant molecules with Pd NPs, resulting in an enhanced catalytic efficiency, while the residence of Pd NPs inside cavities provides a protecting effect for Pd NPs and is beneficial to thermal and catalytic stabilities.
研究领域:
催化
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Ou Wang,Leiyu Diao,Ping Li,Youyou Feng,Dong Cheng,Yaqiong Su,Jing Wei
Pd-based nanoparticles have been widely employed to enhance H 2 sensing performance due to their strong capability for H 2 adsorption and dissociation. However, strong Pd–H* interactions hinder the hydrogen spillover process, while pronounced CO adsorption results in poor selectivity. Herein, we propose a Pt–Pd single-atom alloy (SAA) sensitization strategy that creates electron-deficient Pd δ+ sites to modulate the interaction between Pd and gas molecules. As a proof of concept, Pt 1 Pd SAA is deposited on commercial SnO 2 to fabricate H 2 sensors. The resulting device achieves an ultra-low detection limit (21 ppb), short response and recovery time (0.8 s and 5.9 s), excellent selectivity and enhanced CO resistance, outperforming traditional Pd nanoparticles, PtPd alloy sensitizers modified SnO 2 gas sensors, and commercial H 2 sensors. Mechanistic studies establish that atomic Pt induces electron-deficient Pd δ+ sites, achieving atomic-scale decoupling of hydrogen activation from CO adsorption, which enables barrierless hydrogen spillover and inherently CO-resistance H 2 sensing, with CO back-donation suppressed by nearly 50%. This study presents a robust SAA sensitization strategy that leverages atomic-level modification-induced electronic structure modulation to overcome the sensitivity-selectivity trade-off, demonstrating its promise for next-generation H 2 sensors.
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Ruiying Xie,Feng Zhang,Guishan Hu,Mengzhen Chen,Huixian Wang,Xiaoquan Feng,Xuerui Wang,Yatao Zhang,Meixia Shan
The widespread presence of toxic nitroaromatic compounds in industrial effluents demands advanced remediation strategies. Catalytic reduction is highly effective, while the practical application of powdered catalysts is limited by challenges in recovery and reuse. To overcome this issue, macroscopic Pd@NH 2 -MIL-101/AOPIM-1 porous composite beads were fabricated via a phase inversion method, combining the high surface area of NH 2 -MIL-101 with the excellent processability of amidoxime-functionalized polymers of intrinsic microporosity (AOPIM-1). The incorporation of NH 2 -MIL-101 enriches the composite with amino functional groups, thereby enhancing the adsorption and local enrichment of reactants. Furthermore, these nitrogen-rich sites provide robust anchoring points for the uniform dispersion of Pd nanoparticles, collectively boosting catalytic activity and structural stability. The beads exhibited outstanding catalytic activity for the reduction of nitroaromatics, achieving 99% conversion of 4-nitrophenol (4-NP) within 5 min. The catalyst also maintained excellent structural stability over multiple cycles and allowed easy separation. Furthermore, the catalyst exhibited over 90% efficiency in the reduction of other common nitroaromatic pollutants, underscoring its versatility and applicability in wastewater treatment. This work provides a sustainable and practical solution for wastewater treatment by transforming hazardous contaminants into valuable aromatic amines using an easily separable catalytic system.
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产品关联
DOI
高影响因子
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