Chem Catalysis
·
2025
·
IF 11.6
Yingxin Ma,Xuyun Guo,Wenfang Yuan,Peinuo Yang,Yu Zhang,Wenxuan Chen,Lejuan Cai,Valeria Nicolosi,Wenlong Wang,Yang Chai,Bocheng Qiu
Electrochemical upcycling of nitrate (NO 3 − ) wastewater to ammonia offers a sustainable route for reclaiming nitrogen resources from waste. However, its practical implementation still faces substantial obstacles, including high energy input and limited selectivity. Here, we report a paired electrochemical system that combines the anodic oxidation of polyethylene terephthalate (PET) hydrolysate, specifically its ethylene glycol (EG) monomer, to glycolic acid (GA) with the cathodic reduction of NO 3 − to ammonia. All of this is made possible by the discovery of a PdCu alloy anode and a CuCo alloy cathode. Built upon experimental demonstration and a theoretical understanding of the improved CO resistance on the PdCu alloy for EG oxidation, as well as the synergy between Cu and Co for NO 3 − reduction, our paired system enables the efficient co-production of GA and ammonia from PET hydrolysate and NO 3 − -containing wastewater. This conceptual design of paired electrochemistry provides an intriguing way to synthesize high-value chemicals from waste resources.
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 38
·15009-15014
·
IF 5.101
Jiangbo Hu,Anas Ramadan,Fang Luo,Bin Qi,Xiaojiao Deng,Ji Chen
We introduce an easy and scalable approach to synthesize α-MoO3-decorated graphene sheets from a graphite electrode by molybdate-assisted electrochemical exfoliation. The samples were examined by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transformation infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray diffraction and thermogravimetric analysis. TEM analysis shows that the exfoliated material consists of mainly a few-layers of graphene and the results of XPS, FT-IR and Raman confirmed the presence of α-MoO3 on the graphene sheets. Moreover, XPS spectra indicate that the content of surface oxygen groups on the graphene sheets is lower than that on graphite oxide. After being heat-treated at low-temperature (200 °C), samples exhibited high conductivity (up to 5367 S m−1) and good specific capacitance (up to 86.3 F g−1) when tested as electrode materials in a supercapacitor.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 17
·10175-10185
·
IF 2.599
Zhao Xinran,Yin Fengxiang,Liu Ning,Li Guoru,Fan Tianxi,Chen Biaohua
Metal–organic-frameworks (MOFs) (i.e., MOF(Fe), MOF(Co) and MOF(Cu)) were synthesized by a hydrothermal process. The prepared MOFs were characterized using X-ray diffraction, Fourier transform infrared spectroscopy and N 2 adsorption–desorption. The catalytic activities of the MOFs for the electrochemical synthesis of ammonia were evaluated when using N 2 (air) and water as raw materials at low temperature and ambient pressure. The results indicated that the prepared MOFs have fine crystalline structures, abundant micropores, and large specific surface areas. The prepared MOFs showed excellent catalytic activity for the electrochemical synthesis of ammonia at low temperature and ambient pressure. Among these MOFs, the MOF(Fe) displayed the best catalytic activity, and the highest ammonia formation rate and the highest current efficiency reached 2.12 × 10 −9 mol s −1 cm −2 and 1.43%, respectively, at 1.2 V and 90 °C, when using pure N 2 and water as raw materials. The prepared MOFs in this work showed remarkable catalytic activities for the electrochemical synthesis of ammonia at low temperature and ambient pressure among the non-noble metal catalysts. It was the first exploration to apply MOFs as the electrocatalysts for the electrochemical synthesis of ammonia at low temperature and ambient pressure.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 8
·085501
·
IF 3.1
Yinghong Zhu,Minling Zhou,Zhanbang Ge,Yufeng Jiao,Menghui Wang,Wujin Peng
An efficient and transition-metal-free synthesis strategy of aromatic nitriles from corresponding aldehydes with H2SO4(NH2OH)2 as the nitrogen source and Cl−/ClO− as the redox mediator was developed. The redox Cl−/ClO− showed electrochemical reversibility in acidic condition. The possible mechanism involving the transformation of Cl−, the generation and electrochemical reduction of nitrile oxides based on the results of cyclic voltammetry and constant current electrolysis was proposed.
研究领域:
有机化学
·
电化学
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Dai Zechuan,Chen Yanxu,Zhang Huaikun,Cheng Mingyu,Zhang Bocheng,Feng Pingyi,Feng Yafei,Zhang Genqiang
Electrochemical urea synthesis has recently emerged as a fascinating energy-efficient alternative route, while it remains challenging to achieve simultaneously high production rate and Faradaic efficiency. Herein, we realize an energy-favorable electrochemical C-N coupling path through CO 2 and NO 3 − co-reduction at the heterointerfaces of Cu/Cu 2 O microparticles, generated by in-situ electrochemical engineering on bulk Cu 2 O. We achieve urea production rate of 632.1 μg h −1 mg cat. −1 with a corresponding Faradaic efficiency of 42.3% at −0.3 V (versus RHE) under ambient conditions. Operando synchrotron radiation-Fourier transform infrared spectroscopy, along with theoretical calculations, reveals the coupling of intermediates NOH* and CO* at the heterointerfaces, benefiting from the modified electronic structure. This work provides a practical route for catalyst design and insights into urea electrosynthesis systems.
研究领域:
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
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Fanggong Cai,Xiaobo Lei,Jiao Geng,Wei Sun,Jun Chen,Sude Ma,Qinyong Zhang
The homologous Pb m Bi 2n X m+3n (X = S, Se, Te) is expected as solar cells or thermoelectric materials. Herein, stable phases of ternary PbBi 2 S 4 microspheres were successfully synthesized by two solution-phase-methods assisting with EDTA-2Na in aqueous media, namely traditional chemical reaction under atmospheric pressure and hydrothermal method under high pressure. Field-emission scanning electron microscopy and X-ray diffraction were used to characterize and determine the morphology and structure of the product. EDTA-2Na plays critical roles in the crystallization process of uniform PbBi 2 S 4 microspheres. A mechanistic model is proposed to account for these experimental findings. Furthermore, the optical band gaps of PbBi 2 S 4 were investigated as well.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Lanlan Shen,Zhiru Bai,Yu Jiang,Liying Li,Fengxing Jiang,Jingkun Xu,Huanhuan Qiu,Huixuan Liu,Rongri Tan
Based on quaterthiophenen, bisethyleneoxyl are appended to thiophene rings (2,5-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)thieno[3,2-b]thiophene, BED-TT) for modified monomer structure and obtain a lower onset potential as well as strong electron donor properties. Different molar ratio copolymers of BED-TT with 3,4-ethylenedioxythiophene (EDOT) was electrochemically synthesized, and the effects of changes in the amount of EDOT on the electrochemical and spectrochemistry properties of the copolymers were tracked. The resultant copolymer P(BED-TT- co -EDOT) was characterized via cyclic voltammetry, Raman, and spectroelecrochemistry. The study found that the amount of EDOT in the mixed system of BED-TT and EDOT can regulate the oxidation potential, electrochemical activity, and redox process of polymer films to a certain extent. The spectroelectrochemical results revealed that the copolymer P(BED-TT- co -EDOT) has a narrower optical band gap (1.63-1.67eV) and a richer electrochromic color (from pink purple, purple to gray blue, blue).
研究领域:
材料科学
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电化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Chi Haoyuan,Liang Zhanpeng,Kuang Siyu,Jin Yaxin,Li Minglu,Yan Tianxiang,Lin Jianlong,Wang Shuangyin,Zhang Sheng,Ma Xinbin
Ethylene glycol, a widely used chemical, has a large global capacity exceeding 40 million tons per year. Nevertheless, its production is heavily reliant on fossil fuels, resulting in substantial CO 2 emissions. Herein, we report an approach for electrochemically producing ethylene glycol from biomass glycerol. This process involves glycerol electrooxidation to glycolaldehyde at anode, which is subsequently electro-reduced to ethylene glycol at cathode. While the anode reaction has been reported, the cathode reaction remains a challenge. An electrodeposited electrode with metallic Cu catalyst enables us to achieve glycolaldehyde-to-ethylene glycol conversion with an exceptional faradaic efficiency of about 80%. Experimental and theoretical studies reveal that metallic Cu catalyst facilitates the C=O activation, promoting glycolaldehyde hydrogenation into ethylene glycol. We further assemble a zero-gap electrolyzer and demonstrate ethylene glycol electrosynthesis from glycerol to give a decent production rate of 1.32 mmol cm –2 h –1 under a 3.48 V cell voltage. The carbon intensity assessment based on a valid assumption reveals that our strategy may reduce CO 2 emissions by over 80 million tons annually compared to conventional fossil fuel routes.
研究领域:
化学工程
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环境科学
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能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 19
·1-8
·
IF 2.8
Yan Shuai,Hu Wencai,Wang Sen,Liu Gaobin
In this paper, Sr-doped BaTiO 3 nanoparticles were synthesized via electrochemical method, leading to the successful preparation of Ba 0.67 Sr 0.33 TiO 3 (BST) powders. The phase composition and microstructure of the powders were characterized using X-ray diffraction small angle X-ray scattering, scanning electron microscopy (SEM), and transmission electron microscopy. The results show that the average grain size of the nanoparticles is in the range of 10–20 nm, and the particles with good crystallinity are obtained under the environment of 3 mol.L −1 NaOH concentration. Sintering at 1250 ℃ for 3 h yields nanoscale BST ceramics with a dense structure and an average grain size of about 300 nm. These fine-grained ceramic samples exhibit superior temperature stability compared to relatively coarser BST ceramics. Furthermore, due to their nanoscale grain size, extensive phase transitions result in a low dielectric constant as observed from the dielectric property data. This work presents a novel approach for preparing nanoscale powders and homogeneous ceramics applicable in various electronic applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 9
·2426
·
IF 3.623
Xiaoyuan Fan,Peng Du,Xiaoxuan Ma,Ruyue Wang,Jingteng Ma,Yonggang Wang,Dongyu Fan,Yuanzheng Long,Bohan Deng,Kai Huang,Hui Wu
Production of hydrogen from water splitting has been considered as a promising solution for energy conversion and storage. Since a noble metal-based structure is still the most satisfactory but scarce kind of catalyst, it is significant to allow for practical application of such catalysts by engineering the heterogeneous structure and developing green and facile synthetic strategies. Herein, we report a mechanochemical ball milling synthesis of platinum nanoclusters immobilized on a 2D transition metal carbide MXene (Nb2CTx) as an enhanced catalyst for hydrogen evolution. After annealing at 600 °C, ultrafine Pt3Nb nanoclusters are formed on the Pt/Nb2CTxcatalyst. As prepared, the Pt/Nb2CTx-600 catalyst demonstrates superior electrochemical HER activity and stability with an ultralow overpotential of 5 mV and 46 mV to achieve 10 mA cm−2and 100 mA cm−2, respectively, in comparison with other Nb2CTx-based catalysts and commercial Pt/C catalysts. Moreover, the remarkable durability is also confirmed by accelerated durability tests (ADTs) and long-term chronoamperometry (CA) tests. The excellent HER performance was attributed to high Pt dispersion and more active site exposure by the mechanochemical process and thermal treatment. Such results suggest that the mechanochemical strategy provides a novel approach for rational design and cost-effective production of electrocatalysts, also providing other potential applications in a wide range of areas.Keywords:hydrogen evolution;Pt-Nb alloy;mechanochemical synthesis;thermal annealing
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Lihua Shen,Chenxing Wang,Azhar Abbas,Chunxia Yu,Sichun Zhang,Xinrong Zhang,Chengxiao Zhang
Fluorescent carbon nanodots (CNDs) capable of dual emission blue and red light (B-R-CNDs) (460 and 610 nm) have been synthesized by a simple and low cost electrochemical method of discharging indole dissolved in ethanol in the presence of alkali. The presence of alkali played an important role to achieve switching from single blue emission to dual emission (red and blue). The as-synthesized CNDs have been thoroughly characterized by different spectroscopic techniques. Moreover, the origin of the red emission has been investigated by analyzing the intermediate product of CNDs using gas chromatography–mass spectrometry. It was found that 2-naphthaleneamine, an intermediate product of B-R-CNDs, achieves an extended π-conjugated system and heteroatom functional groups to B-R-CNDs, which are synergistically responsible for emission at longer wavelength. Moreover, the alkali-ethanol system played a pivotal role in structural transition from single emission to dual emission, because surface oxidation is caused by hydroxyl radicals produced in the alkaline system. Surface oxidation creates surface defects thereby giving rise to the surface-state-related red emission. The red emission of B-R-CNDs are found highly pH dependent which makes them a potential candidate for application in pH sensing. Moreover, as-prepared B-R-CNDs have been used in full color bioimaging of HepG2 cells and exhibit an accurate mitochondrial-targeting ability.
研究领域:
材料科学
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生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
CHEMISTRY-A EUROPEAN JOURNAL
·
2016
·Vol. 22
·期 46
·16613-16620
·
IF 5.771
Pengyuan Wang,Jia Liu,Chuanfang Liu,Bin Zheng,Xiaoqin Zou,Mingjun Jia,Guangshan Zhu
Graphical Clusters in voids : Very small metal clusters (Au, Pd, Pt) with sizes around 1.2 nm can be facilely encapsulated within sub-nano-sized cavities of zeolitic imidazolate framework 8 (ZIF-8) through electrochemical synthesis. The confined clusters possess clean surfaces and excellent stabilities, as well as superior catalytic properties in CO oxidation including high turnover rates and good selectivity toward reactants based on narrow pore windows (see figure). It is very interesting and also a big challenge to encapsulate metal clusters within microporous solids to expand their application diversity. For this target, herein, we present an electrochemical synthesis strategy for the encapsulation of noble metals (Au, Pd, Pt) within ZIF-8 cavities. In this method, metal precursors of AuCl 4 2− , PtCl 6 2− , and PdCl 4 2− are introduced into ZIF-8 crystals during the concurrent crystallization of ZIF-8 at the anode. As a consequence, very small metal clusters with sizes around 1.2 nm are obtained within ZIF-8 crystals after hydrogen reduction; these clusters exhibit high thermal stability, as evident from the good maintenance of their original sizes after a high-temperature test. The catalytic properties of the encapsulated metal clusters within ZIF-8 are evaluated for CO oxidations. Because of the small pore window of ZIF-8 (0.34 nm) and the confinement effect of small pores, about 80 % of the metal clusters (fractions of 0.74, 0.77, and 0.75 for Au, Pt, and Pd in ZIF-8, respectively) retain their catalytic activity after exposure to the organosulfur poison thiophene (0.46 nm), which is in contrast to their counterparts (fractions of 0.22, 0.25, and 0.20 for Au, Pt, and Pd on the SiO 2 support). The excellent performances of metal clusters encapsulated within ZIF-8 crystals give new opportunities for catalytic reactions.
研究领域:
材料科学
·
催化化学
✓ 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）