ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Qiang Wang,Lina Kong,Jianping Xu,Baozeng Zhou,Xiaofan Liu,Ziyu Lin,Shaobo Shi,Xiaosong Zhang,Lan Li
The construction of efficient and nonprecious cocatalysts, along with the establishment of rapid interfacial charge migration pathways to host semiconductors, is a major process in enhancing photocatalytic water splitting performance and remains a formidable challenge. Herein, the composition of CoP/CoO cocatalysts on g-C3N4 is regulated through phosphating for efficient and stable H2 evolution. Comprehensive analyses reveal that the CoO nanocrystals, possessing a bandgap of 1.95 eV, are uniformly loaded onto g-C3N4 with a portion undergoing an in situ transformation to metallic CoP, thereby forming a well-defined interfacial energy level structure for carrier separation. Moreover, the CoP/CoO cocatalysts exhibited a lower hydrogen adsorption Gibbs free energy (ΔGH) than that of the mono CoP or CoO. The optimal CoP/CoO/g-C3N4 exhibits an attractive and stable rate of solar-driven H2 evolution at 0.86 mmol·g–1·h–1, surpassing the rates of CoO/g-C3N4 and Pt/g-C3N4 by 30 and 1.5 times, respectively. The dual-driven interfaces of CoP/CoO/g-C3N4 provide a 2-fold acceleration for directional carrier transfer, in conjunction with accelerated surface reaction kinetics, resulting in efficient and stable H2 evolution. This scalable strategy, focusing interfacial engineering for rapid carrier transfer, offers a novel perspective in the design of highly active cocatalysts to boost the photocatalytic application.
研究领域:
材料科学
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催化化学
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能源科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
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IF 20.2
Hui Li,Li Du,Ying Zhang,Xu Liu,Shuang Li,Chun Cheng Yang,Qing Jiang
The rational construction of high-efficiency transition metal phosphides catalysts for hydrogen evolution reaction (HER) is crucial since their sluggish kinetics of water dissociation remain severe barriers for HER performance. The theoretical calculations indicate a unique adsorption-diffusion-decomposition mechanism for H 2 O molecules on CoP (111) surface. Herein, Fe could decrease H 2 O decomposition barrier energies and increase the amount of active sites, along with Cr could accelerate H 2 O adsorption, diffusion and increase the conductivity of the reaction surface. Aided by this mechanism, a self-supported electrode of Cr and Fe dual-doped CoP nanorod arrays grown on nickel foam was prepared. The electrode only requires an overpotential of 27 mV at 10 mA cm −2 for alkaline HER with excellent durability for 400 h. Moreover, the catalyst presents only 1.505 V at 10 mA cm −2 for alkaline water electrolysis. This work provides an in-depth understanding on catalytic mechanism of CoP-based materials.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Dongsheng Dai,Hao Xu,Lei Ge,Changcun Han,Yangqin Gao,Songsong Li,Yan Lu
The generation of hydrogen (H 2 ) through photocatalytic water splitting with the employment of various co-catalysts has attracted much attention. In this study, the CoP was successfully decorated on Zn 0.5 Cd 0.5 S as a highly efficient co-catalyst via a two-step in-situ chemical deposition method. The chemical as well as photophysical properties of the as-obtained CoP/Zn 0.5 Cd 0.5 S samples were characterized by X-ray diffractometry (XRD), Transmission electron microscope (TEM), UV–vis diffusion reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and surface photovoltage spectroscopy (SPV). The CoP/Zn 0.5 Cd 0.5 S composite sample with 5% molar content showed the highest photocatalytic H 2 evolution activity with a corresponding H 2 evolution rate of 734 umol h −1 , which was about 20 times higher than that of pure Zn 0.5 Cd 0.5 S sample and 2 times higher than Pt loaded Zn 0.5 Cd 0.5 S sample under visible light irradiation. The photocatalytic activity of the CoP/Zn 0.5 Cd 0.5 S composite sample was stable even after 4 cycling photocatalytic experiments. A possible mechanism on the photocatalytic enhancement of CoP was systematically investigated, which can provide a novel concept for the synthesis of other desirable photocatalytic materials with high photocatalytic performance.
研究领域:
材料科学
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光催化
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能源化学
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纳米材料
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半导体催化
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太阳能转化
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氢能
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Dongfeng Sun,Pengpeng Qiang,Yuan Yu,Jingyun Zhang,Linyin Huang,Yanning Qu,Qingmei Su,Bingshe Xu
In this study, we meticulously prepared electrocatalysts in the form of Ru nanoclusters-decorated CoP nanowire arrays supported on carbon cloth (Ru@CoP/CC) for HER under both alkaline and acidic conditions. Ru@CoP/CC exhibited exceptional catalytic activity for hydrogen evolution, showcasing overpotentials of 48 mV and 66 mV (10 mA/cm 2 ) in acidic and alkaline media, respectively, which closes to 20% of commercial Pt/C catalysts. Moreover, they showcased outstanding durability, a crucial aspect for their practical application in hydrogen production. Furthermore, this research employed DFT computations to attain a comprehensive understanding of the electronic and structural modifications brought about by the integration of Ru nanoclusters. Ru nanoclusters could coordination environment of CoP, and then effectively accelerate the catalytic reaction. This method opens up a new way to reduce the amount of precious metals in the electrocatalyst, and is helpful to the development of high-performance HER electrocatalyst.
研究领域:
材料科学
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电化学
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催化
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2018
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IF 7.082
Xian Wang,Zuju Ma,Lulu Chai,Leqiong Xu,Ziyi Zhu,Yue Hu,Jinjie Qian,Shaoming Huang
Growing demand for clean and renewable energy resources has sparked intensive research on the development of an effective strategy to prepare non-noble metal electrocatalysts for oxygen evolution reaction (OER). Herein, we report a new type of N-doped carbon coated CoP particle/carbon nanotube composite (CNT-NC-CoP) has been synthesized by in situ nucleation and growth of ZIF-67 nanoparticles onto carbon nanotubes, which subsequently is treated with carbonization and phosphorization. Unique hierarchical structure endows as-obtained CNT-NC-CoP with high specific surface area , abundant exposed active sites, quick ion diffusion path , and good electrical conductivity , thus exhibiting the highest electrocatalytic capability with the low overpotential of 251 mV at the current density of 10 mA cm −2 and remaining long-term durability (overlapping LSV curve after 10 h). Besides, density functional theory (DFT) calculations reveal that CoOOH/graphene charged surfaces are more effective for facilitating intermediates adsorption and improving the corresponding catalytic activity .
研究领域:
材料化学
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电化学
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纳米材料科学
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能源催化
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功能材料
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计算材料学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Rui Luo,Chao Liu,Jiansheng Li,Jing Wang,Xingru Hu,Xiuyun Sun,Jinyou Shen,Weiqing Han,Lianjun Wang
A new catalyst system of CoP/peroxymonosulfate (PMS) is presented, which achieved significant improvement in catalytic activity. Nanostructured CoP, obtained by a simple solid-state reaction, exhibited dramatic catalytic activity with 97.2% degradation of orange II of 100 ppm within 4 min. Moreover, the high efficiency could be reached for other phenolic pollutants, i.e., phenol and 4-chlorophenol. The reaction rate is much higher than the most reported catalysts. Effect of parameters on catalytic activity of the catalyst was studied in detail. Notably, initial pH of the solution had a slight negative effect on the catalytic performance over the pH range 4.07–10.92, suggesting that CoP has the great adaptability of pH. CoP/PMS demonstrated excellent anti-interference performance toward anions (Cl − , NO 3 − , and HCO 3 − ). In addition, the pathway of degradation of orange II is proposed by analyzing its intermediates. Based on the XPS spectra of CoP, the identification of the reactive species ( OH and SO 4 − ) by electron paramagnetic resonance (EPR) analysis and quenching tests, a possible mechanism for activation of PMS by CoP was proposed. Considering the dramatic catalytic activity, a wide range of pH catalyst suited, CoP is believed to provide robust support for the promising industrial application of AOPs.
研究领域:
环境科学
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催化
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水处理
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污染物降解
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2024
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IF 3.1
Yu Yan,Dongxiao Li,Zhimin Guo,Hao Ren,Yubiao Huang,Bei Yan,Ruihuan Zhao,Xin Yao
Developing efficient, low-price non-noble metal-based electrocatalysts for overall water splitting in alkaline medium remains a formidable challenge. In our work, Cr-doped CoP/Fe2P (Cr-CoP/Fe2P) flower-like microsphere was synthesized through a simple hydrothermal and phosphating process. The resulting Cr-CoP/Fe2P electrocatalyst shows significantly enhanced oxygen evolution reaction performance (262 mV @ 10 mA cm-2) and has a satisfactory hydrogen evolution reaction performance (114 mV @ 10 mA cm-2), coupled with favorable stability in an alkaline medium. Furthermore, when assembling Cr-CoP/Fe2P into an electrolytic cell, the two-electrode system can provide a current density of 10 mA cm-2 at a voltage of 1.61 V. At high current density, the performance of the electrolytic cell composed of Cr-CoP/Fe2P is superior to that of noble metal catalyst electrode pair. Electronic structure analysis and various characterizations confirm that Cr doping and the formation of CoP/Fe2P heterogeneous interfaces redistribute the electron densities of the active sites, enlarge the specific surface area, and enhance the aerophobicity of the catalysts, thereby improving the electrocatalytic property. This work provides a referable method for engineering highly efficient and stable non-noble polymetallic phosphides, which serve as bifunctional electrocatalyst for overall water splitting.
研究领域:
材料科学
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电化学
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催化
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Yang Nan,Tianpeng Liu,Wenhao Liu,Dong Cao,Daojian Cheng
Constructing highly active and noble metal-free electrocatalysts is significant for the anodic oxygen evolution reaction (OER). Herein, uniform carbon-coated CoP nanospheres (CoP/C) are developed by a direct impregnation coupling phosphorization approach. Importantly, CoP/C only takes a small overpotential of 230 mV at the current density of 10 mA cm–2 and displays a Tafel slope of 56.87 mV dec–1. Furthermore, the intrinsic activity of CoP/C is 21.44 times better than that of commercial RuO2 under an overpotential of 260 mV. In situ Raman spectroscopy studies revealed that a large number of generated Co–O and Co–OH species could facilitate the *OH adsorption, effectively accelerating the reaction kinetics. Meanwhile, the carbon shell with a large number of mesoporous pores acts as the chainmail of CoP, which could improve the active surface area of the catalyst and prevent the Co sites from oxidative dissolution. This work provides a facile and effective reference for the development of highly active and stable OER catalysts.
研究领域:
材料科学
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电化学
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催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Mengtian Jin,Xian Zhang,Run Shi,Qing Lian,Shuzhang Niu,Ouwen Peng,Qun Wang,Chun Cheng
For large-scale implementation of electrochemical hydrogen production , it is essential to develop electrocatalysts that work well at high current densities over a wide pH range. Herein, we use a facile method to synthesize a hierarchical bimetal phosphide (CoP@Ni 2 P) on nickel foam, which requires very low overpotentials to achieve the benchmark 10 mA cm −2 (e.g., 16 mV in alkaline media). Furthermore, the CoP@Ni 2 P can deliver a high current density of 500 mA cm −2 at small overpotentials and show no obvious decay after the durability test for over 48 h at all pH levels. The outstanding catalytic performance is attributed to the superaerophobicity of the electrode surface, fast electron transport as well as the increased number of exposed active sites caused by the hierarchical structure and the synergistic effect of the heterostructures. Consequently, this work provides an advanced transition metal-based phosphide for large-scale hydrogen production in all pH ranges.
研究领域:
材料科学
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电化学
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催化
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可再生能源
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Xiaolin Liu,Tian Tian,Aifeng Liu,Zengcai Guo,Jingbo Mu,Xiaoliang Zhang,Xuan Yue,Xiaoyan Liu,Fei Gao,Hongwei Che
Herein, nitrogen-doped carbon (NC) encapsulated CoP hollow spheres are designed and prepared through a sodium L-aspartate assisted carbonization-oxidation-phosphorization route. Experimental and theoretical analysis unveil that the encapsulating of NC results in improved electric conductivity and enhanced electrolyte wettability. Particularly, an interfacial charge redistribution induces the establishment of local electric field at the CoP/NC interface, which leads to a decrease in surface OH – adsorption energies, an enhancement in charge transfer efficiency between OH – and active materials, and a reduction in OH – diffusion energy barriers. Thus, the CoP@NC electrode materials demonstrate enhanced capacity values (998C g −1 at 2 A g −1 and 640C g −1 at 20 A g −1 ) and cyclic stability (a capacity retention of 92.7 % after 5000 cycles). Moreover, three-dimensional macroporous N-doped carbon foams (MNCFs) are prepared through a facile and eco-friendly strategy using sodium L-aspartate as N-containing carbon source. Such MNCFs possess large surface area, enhanced electrical conductivity, and high-efficiency mass and ion transport, thus achieving specific capacitances of up to 426F g −1 at 1 A g −1 and 325F g −1 at 10 A g −1 . Furthermore, the fabricated CoP@NC||MNCFs hybrid supercapacitor device delivers an energy density of up to 75.1 Wh kg −1 at 800 W kg −1 , and demonstrates a capacity retention of 93.8 % after 5000 cycles. Our work not only provides valuable insights but also opens new avenues for designing and constructing advanced electrode materials for high-efficiency energy storage applications.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Boyuan Liu,Peng Zhao,Zongdeng Wu,Cai Liu,Haiyan Jing,Juanjuan Song,Keren Lu,Wu Lei,Qingli Hao
The exploration of bifunctional catalyst with economic, durable, and efficient performance plays a crucial role to boost both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in overall water splitting. Herein, we report a feasible strategy to design effective heterostructure between CoP and Ti 3 C 2 T x MXene (denoted as CoP/Ti 3 C 2 T x ). This approach allows for the growth of CoP nanoparticles with uniform size of 5 nm on the Ti 3 C 2 T x MXene, further enhancing the water electrolysis efficiency. The CoP/Ti 3 C 2 T x bifunctional catalyst demonstrates an exceptional HER activity with a satisfactory overpotential of 103 mV at 10 mA cm −2 , and also can drive 10 mA cm −2 for OER with the overpotential of 312 mV in 1.0 M KOH. Moreover, the CoP/Ti 3 C 2 T x -based electrolyzer exhibits high electrochemical stability for 24 h with a low required voltage of 1.66 V at 10 mA cm −2 . The density functional theory (DFT) calculations reveal that the introduction of Ti 3 C 2 T x MXene significantly adjusts d-band center towards Fermi level and expand total density of states, resulting in great electrical conductivity, enhanced water adsorption, and activation. This study provides an available mode for effective design and construction of non-noble-metal-based dual-functional catalyst toward practical energy conversion.
研究领域:
材料科学
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电化学
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能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mengyuan Qiu,Yongzhi Xiong,Wei Zhao,Dong Ouyang,Zongxuan Wu,Tangtianxiang Liang,Changzhou Chen,Shengchun Hu,Hao Sun
Designing low-cost, high-performance electrocatalysts for the electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to produce 2,5-furandicarboxylic acid (FDCA) remains a significant challenge. Herein, we report a novel post-pyrolysis phosphidation method for preparing Nb- and Fe-doped CoP-based catalysts. Nb-CoP@NC delivers a current density of 91.79 mA cm⁻² at a potential of only 1.50 V vs. RHE, achieving nearly 100 % HMF conversion, 98.3 % FDCA selectivity, and 95.6 % Faradaic efficiency (FE). Structural and surface analyses via XRD and XPS reveal that Nb doping significantly modulates the electronic structure of CoP, generating Nb 5+δ active species, which show superior catalytic activity for HMFOR compared to Fe 3+δ . This work not only highlights the pivotal role of Nb doping in enhancing catalytic performance but also provides a general and facile strategy for constructing efficient bimetallic CoP-based catalysts for biomass-derived HMF oxidation.
研究领域:
催化
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电化学
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生物质转化
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材料科学
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绿色化学
✓ 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）