ACS Applied Nano Materials
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2025
·
IF 5.5
Rui Yang,Jian Wu,Jaafar Abdul-Aziz Mehrez,Xue Liu,Yaozong Zhai,Xiao Li,Yuyang Wang,Jianhua Yang,Nantao Hu,Min Zeng,Hao Zhu,Zhi Yang
To address the energy crisis and mitigate greenhouse gas emissions, substantial investments are advancing hydrogen (H2) technologies. Reliable, efficient room-temperature H2 sensors are critical for ensuring safe H2 production and utilization. Here, we report a palladium/palladium oxide (Pd/PdO) nanosheet composite capable of detecting H2 concentrations as low as 0.5 ppm at room temperature. The sensor exhibits exceptional stability, maintaining this detection limit after four months under ambient conditions. The superior H2 sensing performance stems from two key features: (1) the ultrathin nanosheet morphology, which offers abundant reactive sites, and (2) Pd nanoregions that enhance chemical and electronic sensitization. Together, these attributes synergistically elevate room-temperature H2 detection. This work demonstrates a promising strategy for advancing H2 sensor performance, supporting the transition to a hydrogen-based economy.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Zhongmiao Gong,Zhigang Chen,Hao Li,Guang Yang,Min Yuan,Zhiyun Li,Xueying Wan,Yi Cui
Surface-supported isolated atoms in single-atom catalysts (SACs) grant maximum utilization of metals in heterogeneous catalysis. Herein, we report a feasible pyrolysis strategy to synthesize Pd single atoms by thermally melting Pd nanoparticles on an oxygen-vacancy-rich tungsten-oxide matrix at reduction atmosphere. Near ambient pressure X-ray photoelectron spectroscopy was used to monitor the formation of zero-valence Pd single atoms and the increased metallic feature of WO 3− x substrate. Accordingly, the as-obtained zero-valence Pd single-atom catalyst exhibits a markedly boosted HER activity with a low overpotential ( η 10 = 70 mV) at the current density of 10 mA/cm 2 and a small Tafel slope ( b = 68 mV/dec), nearly 150 mV and a 3.0-fold enhancement than those of Pd nanoparticles ( η 10 = 220 mV, b = 133 mV/dec) under the same conditions. In addition, quasi in situ XPS results suggest the hydrogen spillover effect is more likely to occur on Pd single atoms during the electrochemical process. Our work may pave an interesting route for the rational design of highly-efficient single-atom catalyst, and the elucidation of corresponding enhanced reaction mechanisms by the utilization of advanced characterization techniques.
研究领域:
催化化学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 4
·441
·
IF 4.146
Yun Chen,Xinlei Ding,Wenge Qiu,Jianwei Song,Junping Nan,Guangmei Bai,Siping Pang
The influence of the surface chemical properties of the carbon support on the Pd dispersion, activity and stability of Pd(OH)2/C catalyst for the hydrogenolytic debenzylation of tetraacetyldibenzylhexaazaisowurtzitane (TADB) was studied in detail. The flowerlike nanosheet carbon material (NSC) was chosen as the pristine support, meanwhile chemical oxidation with nitric acid and physical calcination at 600 °C treatments were used to modify its surface properties, which were denoted as NSCox-2(treated with 20 wt% HNO3) and NSC-600, respectively. The three carbon supports and the corresponding catalysts of Pd/NSC, Pd/NSC-600, and Pd/NSCox-2were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), nitrogen sorption isotherm measurement (BET), powder X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectra (XPS), temperature-programmed desorption (TPD), temperature-programmed reduction (H2-TPR), thermogravimetric analysis (TG), and element analysis. The debenzylation activities of Pd/NSC, Pd/NSC-600, and Pd/NSCox-2, as well as the three catalysts after pre-reduction treatment were also evaluated. It was found that the activity and stability of the Pd(OH)2/C catalysts in the debenzylation reaction highly depended on the content of surface oxygen-containing groups of the carbon support.Keywords:palladium catalyst;hydrogenolytic debenzylation;surface oxygen-containing groups;palladium dispersion
研究领域:
催化
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 14
·1188
·
IF 4.4
Hongyang Wu,Chen Chen
The efficient detection of n-butanol, which is in demand for highly sensitive materials, is essential for multiple applications. A nonaqueous method was applied to prepare NiFe2O4nanoparticles (NPs) using benzyl alcohol as a solvent, which shows a size of 7.9 ± 1.6 nm and a large surface area of 82.23 m2/g. To further improve the sensing performance for n-butanol, Pd/PdO functionalization was sensitized with NiFe2O4NPs. Gas sensing results demonstrate that the Pd/PdO-NiFe2O4exhibits an enhanced response of 36.9 to 300 ppm n-butanol and a fast response and recovery time (18.2/17.6 s) at 260 °C. Furthermore, the Pd/PdO-NiFe2O4-based sensor possesses a good linear relationship between responses and the n-butanol concentration from 1 to 1000 ppm, and great selectivity against other volatile organic compounds (VOCs). The excellent sensing enhancement is attributed to the catalytic effects of Pd/PdO, the increase of oxygen vacancies, and the formation of heterojunction between PdO and NiFe2O4. Thus, this study offers an effective route for the synthesis of Pd/PdO-functionalized NiFe2O4NPs to achieve n-butanol detection with excellent sensing performance.
研究领域:
材料科学
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化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
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2025
·
IF 13.1
Zhao Wang,Hao Yuan,Jian Tao,Shu-Lin Liu,Ying Hong,Zhi-Yi Hu,Jian Zhang,Bao-Lian Su
Semihydrogenation plays a key role in industrial hydrorefining of light alkenes, with a market above 400 billion by 2027. The high cost of commercial palladium-based catalysts strongly calls for innovation but with great challenges. Herein, copper nanoparticles decorated with a minimized ppm of Pd are developed through a chemical plating process to integrate the catalytic advantages of copper and palladium for achieving maximized catalysis in the semihydrogenation of a fatal impurity of butadiene in alkene feedstocks. The developed Pd–Cu catalyst (i.e., 114 ppm of Pd in Pd0.0033Cu1/TiO2) exhibits an unprecedented catalytic performance superior to commercial Pd/Al2O3, with 100% butene selectivity above 90% of butadiene conversion over 130 h on stream at 90 °C. Further exploration reveals that the atomically dispersed Pd on Cu nanoparticles, obtained at ultralow ppm levels of Pd loading, induces a hidden but critical H2 trap, which concentrates H2 on the Pd site for further H2 dissociation that offers intermediate hydrogen atoms to the tandem butadiene semihydrogenation over the third layer of Cu atoms neighboring Pd through hydrogen spillover. Moreover, a threshold on Pd density was identified at Pd/Cu surficial atomic ratio of 1/138 (i.e., Pd0.0033Cu1/TiO2) for maximizing butadiene semihydrogenation performance, based on an extreme collaboration between Pd for H2 dissociation and Cu for butadiene hydrogenation. This work provides important guidance for developing noble metal-saving catalysts in industrial applications.
研究领域:
催化化学
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材料科学
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工业化学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2014
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IF 5.211
Jing-Jing Lv,Jie-Ning Zheng,Ying-Ying Wang,Ai-Jun Wang,Li-Li Chen,Jiu-Ju Feng
Well-defined platinum–palladium@palladium core–shell nanospheres (PtPd@Pd NSs) are synthesized by a facile one-pot solution approach using N -methylimidazole and poly(vinyl pyrrolidone) (PVP) as directing and capping agents, respectively, without using any seed, template, or organic solvent . The coexistence of the precursors, N -methylimidazole, PVP, and reaction temperature has great effects on the final morphology. Thus-prepared nanocomposites display an improved electrocatalytic activity for oxygen reduction reaction (ORR) in acidic media, methanol and ethylene glycol oxidation reaction in alkaline media , compared with Pt nanoparticles , Pd nanoparticles, commercial Pt black and Pd black catalysts. This method may direct a general orientation for shape control synthesis of functional bimetallic nanocrystals as promising electrocatalysts in direct alcohol fuel cells (DAFCs).
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2024
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IF 10.8
Yu Wang,Qian-Yuan Wu,Min-Yong Lee,Yu-Jia Nong,Wen-Long Wang,Jörg E. Drewes
Electrocatalytic hydrodechlorination is a promising approach for simultaneous pollutant purification and valorization. However, the lack of electrocatalysts with high catalytic activity and selectivity limits its application. Here, we propose a palladium–palladium oxide (Pd-PdO) heterostructure for efficient electrocatalytic hydrodechlorination of recalcitrant chlorophenols and selective formation of phenol with superior Pd-mass activity (1.35 min–1 mgPd–1), which is 4.4 times of commercial Pd/C and about 10–100 times of reported Pd-based catalysts. The Pd-PdO heterostructure is stable in real water matrices and achieves selective phenol recovery (>99%) from the chlorophenol mixture and efficient detoxification along chlorophenol removal. Experimental results and computational modeling reveal that the adsorption/desorption behaviors of zerovalent Pd and PdO sites in the Pd-PdO heterostructure are optimized and a synergy is realized to promote atomic hydrogen (H*) generation, transfer, and utilization: H* is efficiently generated at zerovalent Pd sites, transferred to PdO sites, and eventually consumed in the dechlorination reaction at PdO sites. This work provides a promising strategy to realize the synergy of Pd with different valence states in the metal–metal oxide heterostructure for simultaneous decontamination, detoxification, and resource recovery from halogenated organic pollutants.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 13
·3096-3105
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IF 5.6
Zhongxuan Lin,Ouyang Liu,Shuyan Guan,Xinru Zhao,Zhenluo Yuan,Xianyun Liu,Linyan Bian,Yanping Fan,Qiuming Peng,Shumin Han,Baozhong Liu
An efficient and promising liquid chemical substance for hydrogen storage and production at room temperature is formic acid (FA). In this study, a series of N-doped carbon dot supported Pd nanoparticles (NPs) with mean particle sizes ranging from 1.94 to 2.65 nm were produced and utilized to catalyze efficient dehydrogenation from FA aqueous solution at ambient temperature. The Pd/CD catalysts demonstrated exceptional catalytic performance in FA dehydrogenation without producing CO, resulting in the production of hydrogen. The Pd/CDs-III catalyst delivered 100% FA dehydrogenation in 21 minutes and a TOF value of 256 h−1 at 298 K. Furthermore, electron-rich Pd played a crucial role in facilitating the rupture of the C–H bond. Additionally, the combination of N and self-crosslinked carbon dots assisted in controlling the growth of Pd NPs and improving their dispersion, inhibiting aggregation during the reaction test. This work offers valuable insights for the synthesis of N-doped carbon dot supported highly dispersed Pd-based catalysts for FA dehydrogenation in water.
研究领域:
材料科学
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催化化学
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能源存储与转换
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 17
·7035-7041
·
IF 3.288
Mufei Liu,Hao Yang,Zewen Xu,Wenlu Ma,Fang Cui,George Lu,Linxu Xu,Tieyu Cui
Based on green chemistry, 3D hierarchical ZnO microflowers (MFs) constructed from layered 2D nanosheets have been designed as carriers to uniformly load PdO/Pd nanoparticles by the calcination of the precursor (ZnO/Pd(II) microflowers) in air. The ZnO/Pd(II) microflowers are prepared by dipping the 3D ZnO MFs in an ethanolic solution of PdCl2 without involving additional agents. The as-prepared 3D hierarchical ZnO microflowers are a stable support to enhance the dispersibility of PdO/Pd nanoparticles to achieve better catalytic performance for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). In addition, the synergistic effect between the PdO and Pd nanoparticles is another major driver that promotes the catalytic process. Over 98% of 4-NP is reduced within 7 min. Furthermore, structural analysis of the ZnO/PdO/Pd microflowers can provide useful information for understanding structure-performance relationships.
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Min Yang,Mingyuan Pang,Jianyu Chen,Fahui Gao,Hongliang Li,Peizhi Guo
The synthesis of metal nanometer electrocatalysts with a two-dimensional (2D) structure or rich active sites has become a research hotspot in electrocatalysis. In this work, surfactant hexadecyltrimethylammonium bromide (CTAB) was used to assist the synthesis and assembly of Pd ultrathin nanosheet with the help of Mo(CO)6 in the start system. Pd nanochain composed of nanoparticles is obtained under the same condition, replacing CTAB with carrageenan only. Electrochemical measurements showed that the catalytic peak current density for the electrooxidation of ethanol can reach 2145 mA mg–1 for the Pd nanosheet assembly (NSA) and 1696 mA mg–1 for Pd nanochains. Pd nanosheet assembly also has a lower electron-transfer barrier, better catalytic stability, and antipoisoning performance than that of Pd nanochains. The mechanism of Pd nanosheets and nanochains catalysts the enhanced electrocatalytic activity toward ethanol oxidation has been discussed based on the experimental data.
研究领域:
材料科学
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电化学
·
催化科学
✓ 已验证
DOI
高影响因子
Green Chemical Engineering
·
2025
·
IF 7.6
Ruan Tao,Zhao Lisha,Ouyang Xinping,Li Lifeng,Zhang Wenwei,Qiu Xueqing
The depolymerization of lignin into aromatic monomers with high yield is the bottleneck of high valued utilization of lignin. In this work, a highly dispersed Pd supported on WO 2.72 (Pd/WO 2.72 ) catalyst was prepared for efficient hydrogenolysis lignin. The highly dispersed Pd, high specific surface area, high content of acidic sites, and hydrogen spillover of Pd/WO 2.72 improved the depolymerization efficiency of lignin. In addition, the depolymerized products were alkylated with the reaction solvent to prevent monomers from re-polymerizing, thus further enhancing aromatic monomers yield. Under 320 º C, 6 h, Bio-oil and aromatic monomers yield reached 77.67% and 28.80%, respectively. Among the aromatic monomers, the tert -butyl group substituted products accounted for 65.71%, of which 77.1% were methoxy-free phenols. It was found that the bio-oil had a calorific value of 38.13 MJ/kg and an IC 50 value of 43 mg/L, showing their potential applications as fuels or antioxidant additives.
研究领域:
化学工程
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可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yangzi Zheng,Jiapeng Huang,Ruiyun Guo,Tianou He,Yanan Li,Yaming Liu,Weicong Wang,Qi Zhan,Shangdong Ji,Mingshang Jin
The formic acid oxidation reaction (FAOR) in direct formic acid fuel cells (DFAFCs) relies heavily on the use of Pd catalysts. To improve the performance of DFAFCs, it is crucial to develop highly active and stable Pd catalysts for FAOR. In this work, we demonstrate a novel approach to enhance the electrocatalytic activity and stability of Pd nanocatalysts by incorporating a palladium phosphide (Pd-P) interlayer. The introduction of the Pd-P interlayer can facilitate electron transfer and enhance the vacancy formation energy of the active Pd sites on the surface of Pd@Pd-P@Pd nanocrystals. As a result, the Pd@Pd-P@Pd catalyst can exhibit exceptional long-term durability, with a mass activity of 4.56 A mg -1 Pd and a specific activity of 28.06 mA cm −2 towards FAOR, which are 11.5 and 18.1 times higher than those observed for the commercial Pd/C catalyst, respectively. By leveraging the unique properties of the interlayer in Pd nanocatalysts, this work opens up a promising pathway for enhancing the performance of catalysts in sustainable energy conversion systems.
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）