ENVIRONMENTAL POLLUTION
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2020
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IF 6.793
Yuanyuan Peng,Wenhua Tong,Yi Xie,Wanrong Hu,Yonghong Li,Yongkui Zhang,Yabo Wang
Advanced oxidation processes (AOPs) based on peroxymonosulfate (PMS) activation have attracted increasing attention in recent years for organic pollutants removal . Herein, we put forward a facile method to form cobalt phosphide/carbon composite for PMS activation. Combining impregnation approach with pyrolysis treatment enabled the formation of Co 2 P/biochar composites using baker’s yeast and Co 2+ as precursors. The as-synthesized products exhibited excellent catalytic activity for sulfamethoxazole (SMX) degradation over the pH range 3.0–9.0 b y activating PMS. For example, 100% of SMX (20 mg L −1 ) removal was achieved in 20 min with catalyst dosage of 0.4 g L −1 and PMS loading of 0.4 g L −1 . Near zero Co 2+ leaching was observed during catalytic reaction, which remarkably lowered the toxic risk of transition metal ion in water. Meanwhile, the reusability of catalyst could be attained by thermal treatment. SMX degradation intermediates were identified by liquid chromatography-mass spectrometry (LC-MS), which facilitated the proposal of possible SMX degradation pathways. Ecological Structure Activity Relationships (ECOSAR) analysis indicated that SMX degradation intermediates may not pose ecological toxicity to the environment. Further investigation verified that Co 2 P/biochar composites could set off PMS activation not only for the degradation of SMX but also for other sulfonamides. In this study, we not only developed a facile method of utilizing environmental-benign biomass for transition metal phosphide/carbon composite formation, but also achieved highly efficient antibiotic elimination by PMS-based AOP.
研究领域:
环境科学
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化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2018
·Vol. 22
·期 12
·3977-3983
·
IF 2.509
Li Kaidi,Zhang Fangfang,Wu Haoran,Wang Yina,Du Jimin,Lu Yayun,Wang Weimin,Zhao Guoyan,Kang Dae Joon
Here, we demonstrate the synthesis of sheet-shaped Co 2 P grown on carbon cloth (sheet-shaped Co 2 P-CC) through a facile route. Electrochemical measurements indicated that sheet-shaped Co 2 P-CC with a loading of 0.6 mg cm −2 Co 2 P (denoted Co 2 P-CC-0.6) exhibits exceptional electrocatalytic activity in the hydrogen evolution reaction (HER), with an overpotential of 94 mV at a current density of 10 mA cm −2 and a small Tafel slope of 80 mV decade −1 in 1 M KOH. Similarly, sheet-shaped Co 2 P-CC-0.6 was also found to be an excellent electrocatalyst for the HER in 0.5 M H 2 SO 4 and in 0.5 M phosphate buffer solution (PBS), with overpotentials of 95 and 231 mV at a current density of 10 mA cm −2 , respectively. Sheet-shaped Co 2 P has a large surface area, meaning that it can provide a relatively large number of active sites on its surface, and CC is an highly conductive substrate that, when used in conjunction with Co 2 P, can enhance the conductivity of the electrocatalyst. These outstanding results show that sheet-shaped Co 2 P-CC could be an excellent candidate for a highly efficient electrocatalyst.
研究领域:
电化学
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材料科学
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能源催化
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纳米技术
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表面科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
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2023
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IF 6.2
Yanxi Chen,Jieqiong Kang,Zhenjie Li,Mingshan Zhu,Renli Yin
Peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs) have raised wide attention due to the efficient degradation of pollutants. However, the low efficiency in PMS activation is still a challenge for practical application. Herein, an economic Co 2 P catalyst with surface-active center was constructed for PMS activation to induce fast degradation of carbamazepine (CBZ). Particularly, the removal ratio of CBZ in the Co 2 P/PMS system could achieve at 98% in 10 min, accompanied with the removal ratio of total organic carbon (TOC) reached 60% in 60 min. Characterizations indicated that interfacial transformation of Co δ+ to Co 2+ promoted electron-rich Co center formation, which supplied electrons for PMS to produce SO 4 • – and •OH that were responsible for the efficient degradation of CBZ. Furthermore, potential interferences from the real water matrix, dosage of the catalyst and PMS, and variation of initial pH were carefully studied for practical applications. Besides, three possible degradation pathways of CBZ were proposed and the toxicity of the products was predicted. However, the generation of more toxic intermediates was found in the system for the radical (SO 4 • – and •OH) oxidation is a non-selective oxidation process. Particularly, we expect that this work can provide new insights into the regulation of reaction mechanisms, degradation routes and safe transformation in PMS-AOPs for wastewater treatment .
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Keyu Tao,Huamei Dan,Yang Hai,Li Liu,Yun Gong
Even though transition metal phosphides (TMPs) have been regarded as very promising catalysts for hydrogen evolution reaction (HER), exploring highly reactive TMPs-based catalysts with reliable stability in alkaline media remains an enormous challenge. Herein, using wafer-like Co(CO 3 ) 0.5 (OH)·0.11H 2 O as template followed by anion-exchange and further phosphorization process, it is synthesized a three-dimensional (3D) hierarchical porous heterostructure with highly dispersed ultrafine metallic Co 2 P nanoparticles uniformly anchored on porous conductive CoWO 4 nanofiber matrix, which not only promotes the electron transfer, but also avoids the deterioration of phosphide. In addition, the electron densities re-distribution within the heterostructure also contributes to the improved catalytic activity. Furthermore, the doping of W into Co 2 P gives proper H adsorption free energy ΔG H . Impressively, the Co 2 P/CoWO 4 /Ni foam (NF) exhibits an overpotential of 81 mV at −10 mA cm −2 and a Tafel slop of 47 mV dec −1 along with supreme long-term durability at −40 mA cm −2 . The present work also demonstrates different dosages of Na 2 WO 4 in the anion-exchange step will lead to different phase compositions and morphologies, giving rise to different HER electrocatalytic performances of the phosphorized samples.
研究领域:
材料科学
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电化学
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催化反应
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Dongfeng Sun,Jiaxin Liu,Pengpeng Qiang,Wanquan Ma,Yanning Qu,Shukai Ding,Yu Yuan,Zhiru Li,Bingshe Xu
Designing efficient water splitting electrocatalysts in alkaline electrolytes is crucial but also presents significant challenges. In this study, Co 2 P/MoP/CC catalysts were synthesized using a hydrothermal method and in situ phosphorization with carbon cloth as the substrate. This unique porous octahedral structure features large specific surface area, exposing more active sites and aiding in bubble transportation. At a current density of 10 mA/cm², the overpotentials for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are 86 mV and 280 mV, respectively. This excellent performance is attributed to the formation of a Co 2 P/MoP heterojunction, which promotes electron transfer and enhances the adsorption strength of intermediates. In the overall water splitting experiment, only a low potential of 1.65 V is required to reach 10 mA/cm² and maintain stability for 100,000 seconds. This study offers a novel strategy for the development of efficient water electrolysis catalysts.
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
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Ao Li,Jiran Li,Mengcheng Yin,Qizhen Zhang,Junhong Chen,Bozhong Pi,Minghao Bao,Changkun Song,Wei Shi,Chunpei Yu,Wenchao Zhang
The electrochemical synthesis of azo-bridged nitrogen-rich heterocyclic compounds has emerged as a promising strategy in the field of energetic materials due to its efficiency and controllability. Here, we present an innovative and environmentally benign electrocatalytic strategy employing cobalt phosphide (Co2P) nanowire arrays as cathodic catalysts for the safe and efficient synthesis of sodium 5,5′-azo-tetrazole under mild electrochemical conditions. Notably, the Co2P catalyst drives the reaction at a low potential of −0.4 V (vs Hg/HgO), which benefits from its unique needle-like morphology that optimizes electron transport pathways and active site distribution. By adjustment of the applied potential and reaction time, the yield of the reductive coupling can be effectively controlled. A detailed mechanistic pathway has been elucidated for the cathodic reductive coupling of sodium 5-nitrotetrazole mediated by Co2P electrodes. Electrochemical reduction at −0.6 V (vs Hg/HgO) and −0.8 V (vs Hg/HgO) yields a tunable mixture of sodium 5,5′-azo-tetrazole and its azoxy derivative, whereas exclusive generation of sodium 5,5′-azo-tetrazole is achieved at −1 V (vs Hg/HgO) through precise modulation of electron transfer kinetics. This voltage-gated synthesis paradigm establishes a novel electrochemical methodology for the programmable assembly of nitrogen-rich heterocyclic frameworks, offering unprecedented control over azo-linkage formation in energetic material design.
研究领域:
电化学
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材料科学
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纳米技术
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有机合成
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能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Xiaohui Ma,Wenjun Li,Hongda Li,Mei Dong,Liang Geng,Tianyu Wang,Hualei Zhou,Yanyan Li,Mengchao Li
Constructing heterojunctions is an effective and controllable approach that can boost the activity of photocatalysts. Inspiringly, this study explored a simple method that can be used to construct novel noble-metal-free Co 2 P/CdIn 2 S 4 (CPCIS) heterojunction photocatalysts for photocatalytic hydrogen production. The heterojunction was formed by loading CdIn 2 S 4 (CIS) nanoparticles on the surface of Co 2 P (CP). The structure, morphology, and optical property of the as-prepared samples were characterized by a series of tests. The DRS results showed that, the light absorption range of CPCIS was extended to the full visible light range and its light absorption intensity obviously was enhanced at 500–800 nm. The PL and photoelectrochemical tests manifested that the formed heterojunction promoted the separation of charges. The LSV results indicated that CP reduced the H 2 evolution overpotential of the composites. Besides, CP could serve as active sites of H 2 evolution in heterojunction composites. Interestingly, the H 2 -evolution rate for the optimum CPCIS (471.87 μmol h −1 g −1 ) was around 3.6 times than CIS-Pt. The elevated activity of CPCIS may mainly attribute to the following aspects: its enhanced light absorption, elevated charge separation and increased active site. More importantly, the photocatalytic activity of heterojunction composites didn’t almost decrease after three cycles. This article delivers an idea that can be applied to form heterojunctions between CP and other sulfides for photocatalytic H 2 production, easily extending to other transition metal phosphides.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·
IF 13.3
Zizhuang He,Hanxiao Xu,Lingzi Shi,Xiangru Ren,Jie Kong,Panbo Liu
The synergistic effect of hollow cavities and multiple hetero-interfaces displays huge advantages in achieving lightweight and high-efficient electromagnetic wave absorption, but still confronts huge challenges. Herein, hierarchical Co 2 P/CoS 2 @C@MoS 2 composites via the self-sacrificed strategy and a subsequent hydrothermal method have been successfully synthesized. Specifically, ZIF-67 cores first act as the structural template to form core-shell ZIF-67@poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) (ZIF-67@PZS) composites, which are converted into hollow Co 2 P@C shells with micro-mesoporous characteristics because of the gradient structural stabilities and preferred coordination ability. The deposition of hierarchical MoS 2 results in phase transition (Co 2 P→Co 2 P/CoS 2 ), yielding the formation of hierarchical Co 2 P/CoS 2 @C@MoS 2 composites with hollow cavities and multiple hetero-interfaces. Benefiting from the cooperative advantages of hollow structure, extra N,P,S-doped sources, lattice defects/vacancies, diverse incoherent interfaces, and hierarchical configurations, the composites deliver superior electromagnetic wave capability (−56.6 dB) and wideband absorption bandwidth (8.96 GHz) with 20 wt.% filler loading. This study provides a reliable and facile strategy for the precise construction of superior electromagnetic wave absorbents with efficient absorption attenuation.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Jingmin Duan,Zhongqing Xiang,Hongsong Zhang,Bing Zhang,Xu Xiang
Formic acid (FA) is widely regarded as a hydrogen storage material with great application potential, so finding a suitable and effective catalyst for FA dehydrogenation to generate pure hydrogen under mild conditions is critical for practical applications. Herein, we converted poplar catkin (PC) with microtube structure into N-doped carbon microsheets (NPC) through carbonization, ultrasonic crushing and modification processes , and further immobilized fine Pd and Co 2 P nanoparticles on NPC microsheets to form a novel ternary catalyst of Pd-Co 2 P/NPC . The Pd-Co 2 P/NPC catalysts have excellent catalytic performance for dehydrogenation of FA under mild conditions, with a high selectivity of 100%, high initial turnover frequency value (TOF) of 2980 h −1 at 50 °C and maintained 1530 h −1 even at 30 °C. The catalyst could be recycled consecutively up to seven times without remarkable change in the catalytic activity. The significantly improved performances of Pd-Co 2 P/NPC can be attributed to high dispersity of Pd-Co 2 P nanoparticles and synergetic effect between different components. These results suggest that the biomass-based NPC microsheets may be a promising low-cost supports for the manufacturing various highly efficient nanocatalyts.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yonghao Gan,Ying Ye,Xiaoping Dai,Xueli Yin,Yihua Cao,Run Cai,Xin Zhang
Exploring high-efficiency electrocatalysts for oxygen evolution reaction (OER) is one of the most important concerns to produce hydrogen in water electrolysis. Herein, the FNM/Co 2 P-0.4 heterostructure was designed as an electrocatalyst for the OER process by the combination of MoO 4 2− intercalating NiFe LDH and Co 2 P on nickel foam (NF). The surface reconstruction and MoO 4 2− leaching can induce the conversion of Co 2 P and NiFe LDH on FNM/Co 2 P-0.4 to generate Co/NiOOH with more oxygen vacancies. Beyond, CoOOH and NiOOH can also synergize to reduce the energy barrier of OER, optimize conductivity, and improve stability. The surface reconstruction and the formation of OOH ⁎ were further unveiled by in-situ UV–vis absorption spectra and Fourier-transformed alternative current voltammetry ( FTACV). The integration of interfacial synergies and oxygen vacancies can facilitate the adsorption/desorption of intermediates, regulate the d-band center, and expose more active sites. And as a result, FNM/Co 2 P-0.4 shows a significant low overpotential (240 mV) at 50 mA cm −2 , a small Tafel (74 mV dec −1 ), low activation energy ( E a ) and remarkable durability. This work provides a new pathway to improve the OER performance by using interfacial synergies and rich oxygen vacancies derived from the self-sacrificial reconstruction of heterostructured electrocatalysts.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Dingzhou Xiang,Xuqiang Hao,Zhiliang Jin
Amorphous/crystalline heterostructures show excellent potential in the hydrogen evolution reaction (HER) as they can significantly facilitate surface adsorption and redox reactions. Herein, a unique amorphous Co 2 P/crystalline CoP quantum dots (Co 2 P/CoP QDs) Type-II surface heterojunction was derived from amorphous Co 3 O 4 QDs via phosphorization. The intimate contact between Co 2 P QDs and CoP QDs was conducive to charge transfer, thereby promoting surface reaction kinetics. The unique structure and properties were beneficial to providing more active sites and controlling the electronic structures thus making amorphous/crystalline composites show superior photocatalytic hydrogen (H 2 ) production performance. Additionally, the amorphous Co 2 P QDs had a plethora of unsaturated bonds and abundant defects; the disordered structure led to increased active sites that promoted surface reaction kinetics. Due to the synergistic effect of the quantum confinement of QDs and the surface heterojunction, the charge transfer efficiency of Co 2 P/CoP QDs was extremely high, and high H 2 evolution activity and photostability were achieved. The maximum H 2 generation rate over the Co 2 P/CoP QDs composite reached 11.88 mmol h −1 g −1 with an apparent quantum efficiency (AQE) of 3.88 % at 420 nm, which is roughly 20-times that of the pure Co 3 O 4 QDs. In addition, high photostability was realized; even the photocatalyst that stood for a week reached initial photoactivity. This work offers a novel idea for reasonably establishing amorphous/crystalline photocatalysts to achieve efficient H 2 evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Haibin Zhong,Guanglei Liu,Yudong Cao,Bin Chen,Mingxin Ye,Jianfeng Shen
Splitting water to produce hydrogen through an efficient and low-cost way requires the development of catalysts based on earth-abundant elements. Among transition metal phosphides, bimetal phosphides demonstrate superior hydrogen evolution reactivity to monometal phosphides. Therefore, we synthesized Ni2P–Co2P nanowire arrays on nickel foam with excellent catalytic performance by hydrothermal and low-temperature phosphorization. In 1 M KOH, the catalyst demonstrates low overpotentials of 99 and 161 mV to reach current densities of 10 and 100 mA cm–2, respectively. In 0.5 M H2SO4, the overpotentials of Ni2P–Co2P are only 94 and 159 mV at current densities of 10 and 100 mA cm–2, respectively. In a neutral solution, the overpotentials of the catalyst are also only 146 and 309 mV at current densities of 10 and 100 mA cm–2, respectively. The Tafel slopes of Ni2P–Co2P are only 53.1, 48.26, and 138.3 mV dec–1 in acid, alkaline, and neutral solutions, respectively. Moreover, the outperformance of its durability was tested for 20 h in acid and alkaline solutions, which maintained a stable current density of 10 mA cm–2. This work demonstrates a feasible route to design transition metal phosphides used in pH-universal HER electrocatalysts.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）