JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xuedong Wang,Han Huang,Yongxiu Li,Qingqing Jiang,Xiaole Han,Qin Li,Yi Liu,Juncheng Hu
To address the pressing challenges of energy shortages and environmental sustainability, photocatalytic water splitting for hydrogen production has emerged as a promising strategy for solar energy conversion. While semiconductor catalysts exhibit significant potential in photocatalysis, their practical applications are hindered by limitations such as inefficient charge separation and insufficient active sites. Designing and preparing efficient, non-precious co-catalysts is therefore essential. In this work, we synthesized cobalt phosphide with phosphorus vacancy defects (vp-CoP) hollow microsphere co-catalysts and loaded them with indium zinc sulfide (ZnIn 2 S 4 ) nanosheets to construct vp-CoP@ZnIn 2 S 4 (vp-CoP@ZIS) heterojunction photocatalysts. Under visible light irradiation, the vp-CoP@ZIS photocatalyst achieved a hydrogen production rate of 7.4 mmol g −1 h −1 , which was 7.6 times higher than that of pristine ZnIn 2 S 4 . This remarkable enhancement arises from the synergistic effects between vp-CoP and ZnIn 2 S 4 . Specifically, the introduction of single-atom phosphorus vacancies significantly improved electron transfer efficiency and promoted charge separation within the heterojunction. This innovative design and synthesis strategy underscores the potential of vp-CoP@ZIS as a robust photocatalyst for solar-driven hydrogen production, providing a sustainable pathway for efficient solar energy utilization.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Kailin Li,Yuntao Xiao,Taizhong Zheng,Qing Sun,Yifan Zhang,Hao Teng,Wanyu Wang,Kexin Yao,Jinsong Rao,Yuxin Zhang
Poor rate performance and low cycling stability are both considered as two major disadvantages when choosing cobalt phosphide as the electrode material of supercapacitor. Herein, we developed an effective strategy to ameliorate above disadvantages by introducing of phosphorus vacancies and doping of vanadium simultaneously (the products labelled as V-CoP x-1 ). Besides, diatomite was selected as a template to synthesize cobalt phosphide with a diatomite morphology by a mild etching method using KOH aqueous alcohol solution as etching agent. The average oxidation state of Co ions in V-CoP x-1 decreases after the P vacancies are introduced, which can improve the electrical conductivity and provide more active sites for electrochemical reactions. Meanwhile, after the introduction of P vacancies and V heteroatoms, more point defects and unpaired electrons are generated, thus improving the ionic conductivity of the material. The diatomite morphology of V-CoP x-1 and the morphological transformation after the reduction by NaBH 4 make the materials have larger specific surface area and higher porosity. The as-synthesized V-CoP x-1 possesses a superior 829 F g −1 at 1 A g −1 and improved cycling life maintaining 80.84% of its original value after 10,000 cycles. Moreover, a fabricated device with V-CoP x-1 (anode) and commercial active carbon (cathode) exhibits 43.3 Wh kg −1 at 800 W kg −1 . This supercapacitor also delivers a superior rate performance maintaining 60% retention of specific capacitance from 1 A g −1 to 20 A g −1 . This work provides an efficient strategy of defects regulation to boost the electrochemical performance, which hoped to offer insights for the improvement of cobalt phosphide.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2023
·Vol. 29
·期 56
·e202301521
·
IF 4.3
Luoluo Qi,Zhiyang Huang,Miao Liao,Lei Wang,Lixia Wang,Mingcheng Gao,Tayirjan Taylor Isimjan,Xiulin Yang
Graphical A CoP−FeP heterostructure catalyst with abundant P vacancies (Vp−CoP−FeP/NF) on nickel foam is constructed through impregnation and phosphorization. It demonstrates excellent hydrogen evolution performance and has practical application prospects in high-current overall water splitting. The catalyst‘s unique hierarchical nanosheet structure, plentiful P vacancies and synergistic effect of CoP and FeP accelerate HER kinetics, resulting in its superior performance. The development of hydrogen evolution reaction (HER) catalysts with high performance under large current density is still a challenge. Introducing P vacancies in heterostructure is an appealing strategy to enhance HER kinetics. This study investigates a CoP−FeP heterostructure catalyst with abundant P vacancies (Vp−CoP−FeP/NF) on nickel foam (NF), which was prepared using dipping and phosphating treatment. The optimized Vp−CoP−FeP catalyst exerted prominent HER catalytic capability, requiring an ultra-low overpotential (58 mV @ 10 mA cm −2 ) and displaying robust durability (50 h @ 200 mA cm −2 ) in 1.0 M KOH solution. Furthermore, the catalyst demonstrated superior overall water splitting activity as cathode, demanding only cell voltage of 1.76 V at 200 mA cm −2 , outperforming Pt/C/NF (−) || RuO 2 /NF (+) . The catalyst‘s outstanding performance can be attributed to the hierarchical structure of porous nanosheets, abundant P vacancies, and synergistic effect between CoP and FeP components, which promote water dissociation and H* adsorption and desorption, thereby synergically accelerating HER kinetics and enhancing HER activity. This study demonstrates the potential of HER catalysts with phosphorus-rich vacancies that can work under industrial-scale current density, highlighting the importance of developing durable and efficient catalysts for hydrogen production.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Long Qian,Yao Zhu,Huiting Hu,Yunhua Zheng,Ziyu Yuan,Yuting Dai,Tao Zhang,Dongya Yang,Songlin Xue,Fengxian Qiu
Electrochemical water splitting is a possible way of realizing sustainable and clean hydrogen production but is challenging, because a highly active and durable electrocatalyst is essential. In this work, we integrated heterogeneous engineering and vacancy defect strategies to design and fabricate a heterostructure electrocatalyst (CoPv-MoxPv/CNT) with abundant phosphorus vacancies attached to carbon nanotubes (CNTs). The vacancy defects enabled the optimization of the electronic structure; thereby, the electron-rich low-valent metal sites enhanced the ability of nonmetallic P to capture proton H. Meanwhile, the heterogeneous interface between bimetallic phosphides and CNTs realized rapid electron transfer. In addition, the Co, Mo, and P active species in the electrocatalytic process exposed increased amounts of active sites featuring porous nanosheet structures, which facilitated the adsorption of reaction intermediates and thus enhanced the hydrogen evolution reaction performance. In particular, the optimized CoPv-MoxPv/CNT catalyst possesses an overpotential of 138 mV at a current density of 10 mA cm–2 and long-term stability for 24 h. This work offers insights and possibilities for the engineering and exploration of transition metal-based electrocatalysts through combining multiple synergistic strategies.
研究领域:
材料科学
·
电化学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Peng Wang,Tao Yu,Liping Hao,Xuanwen Liu
Efficient electrocatalysts are crucial for overcoming the sluggish kinetics of the oxygen-evolution reaction (OER) and facilitating the advancement of energy storage technologies such as metal-air batteries and hydrogen production through water electrolysis. This study proposes a synergistic approach combining amorphization and interfacial engineering to improve OER performance by fabricating heterojunctions between crystalline NiFe(OH) x and amorphous NiP x . The formation of a strongly coupled crystalline-amorphous heterojunction enables optimization of the electronic structure at the catalytic site and accelerates charge transfer at the interface, thereby improving the reaction kinetics. Notably, we investigate the dynamic adsorption behavior of PO 4 3− during the OER process by introducing Na 3 PO 4 into the electrolyte, revealing that P vacancies serve as active sites in promoting OER activity. Lastly, electrochemical measurements demonstrate that NiFe(OH) x /NiP x /NF exhibits a low overpotential of 220 mV at 10 mA cm −2 and Tafel slope of 35 mV·dec −1 , surpassing the performance of laboratory-prepared noble metal catalysts and most reported NiFe-based electrocatalysts.
研究领域:
电化学
·
材料科学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lihua Zhi,Mingming Zhang,Jibing Tu,Min Li
Vacancy engineering and heterostructure construction are regarded as potent approaches for synergistically boosting hydrogen production in renewable energy conversion. Herein, a selective phosphorization strategy was implemented to fabricate coral-like ZnO/FeCoP@ N -doped carbon hierarchical microspheres (ZnO/FeCoP@NCHMS) via only controllably phosphorizing the Co and Fe atoms in a precursor, which was formed by generating ZnCoFe LDH on the surface of a zinc cobalt coordination polymer microsphere. Then, by adopting a reduction treatment for ZnO/FeCoP@NCHMS, the innovative ZnO/FeCoPv@NCHMS with abundant phosphorus vacancies (Pv) was realized. The introduction of phosphorus vacancy could optimize the electronic structures of metal phosphides and accelerate the reconstruction of active species, thus speeding up the reaction kinetic. Likewise, the plentiful heterointerfaces greatly expedite the transfer of electrons and protons, exposing ultra-high active sites. By virtue of these fascinating characters and the unique coral-like hierarchical architecture, the as-prepared ZnO/FeCoPv@NCHMS reveal preeminent electrocatalytic activities, and the overpotentials for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) are as low as 177 and 173 mV at 10 mA cm −2 in alkaline medium, respectively. Impressively, the water electrolysis device assembled by ZnO/FeCoPv@NCHMS requires a mere cell voltage of 1.508 V to attain a current density of 10 mA cm −2 . Furthermore, the ZnO/FeCoPv@NCHMS also demonstrate extraordinary durability, sustaining operation for at least 28 h (at 100 mA cm −2 ) during the water splitting process. This study provides novel insights into defect regulation and heterointerface construction for overall water splitting.
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
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhaoshun Liu,Junli Xu,Fang Zhang,Lu Ji,Jiaxin Yang,Zhongning Shi
High-entropy materials have received increasing attention due to their unique physicochemical characteristics and remarkable properties for oxygen evolution reaction (OER). The synthesis of high-entropy metal phosphides (HEMPs) has rarely been reported owing to the incompatibility between different metal ions and phosphorus. Herein, the phosphorus vacancies (Pv) enriched N-doped C HEMPs (N-C@CoNiMnCuFeP/NF) for OER were prepared by a facile ZIF-derived phosphide method. Abundant Pv and amorphous structures increase the active sites and modulate the electronic structure of electrocatalyst to improve the OER performance. Besides, the synergistic effect among the metallic elements is beneficial for enhancing the electrocatalytic activity. Accordingly, HEMP-450 shows outstanding catalytic performance with the overpotential of 199 mV and continuously reacts for 140 hours without performance degradation for OER at 100 mA cm −2 . This work demonstrates a simple template strategy for reasonably preparing HEMPs electrocatalyst with rich Pv.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Yuting Yang,Luyan Shi,Qinrui Liang,Yi Liu,Jiaxin Dong,Tayirjan Taylor Isimjan,Bao Wang,Xiulin Yang
A high-performance and highly CO-resilient hydrogen oxidation reaction (HOR) electrocatalyst is heralded as core material to solve the commercial deployment of hydrogen fuel cells. Phosphorus vacancies, as a type of delicate point defect, could effectively and flexibly modulate the catalytic performance. Therefore, based on the vacancy design philosophy of “less is more”, we synthesize a phosphorus-vacancy-rich Pd 3 P@C (V p -Pd 3 P@C) catalyst with bowl-like hemisphere structure for alkaline HOR, for the first time. The V p -Pd 3 P@C catalyst exhibits remarkable mass activity and exchange current density of 1.66 mA μg Pd –1 and 3.2 mA cm –2 , respectively, surpassing those of Pd 3 P@C (0.45 mA μg Pd –1 , 1.78 mA cm –2 ) and commercial Pt/C (0.3 mA μg Pt –1 , 2.29 mA cm –2 ). Intriguingly, the catalyst can tolerate 1000 ppm CO that Pt/C catalyst lacks. Density functional theory calculations uncover that the optimal local coordination environment and favorable electronic structure that rooted from phosphorus vacancy enable optimum adsorption kinetics of hydrogen and hydroxyl while concomitantly suppressing Pd 4 d → CO 2π* back donation, contributing to the remarkable HOR reactivity and CO tolerance.
研究领域:
材料科学
·
电化学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Qiang Zhang,Wei-Bin Zhang,Xue-Jing Ma,Lun Zhang,Xu Bao,Yao-Wen Guo,Jianping Long
It is an indisputable fact that electrochemical performance is always ameliorated by introducing proper phosphorus vacancy defect into electrode materials. In this work, the lattice-like CoP grown on the nickel foam with appropriate concentration of vacancies is fabricated successfully. The specific capacitance of 1865 F g −1 is improved by 1.7 times compared with the pristine CoP of 1125 F g −1 at the current density of 1 A g −1 . Meanwhile, the deliberately designed electrode also possesses great stability of retention rate up to 90% after 5000 cycles. Before the electrode is assembled into the asymmetric supercapacitor , the potential window is altered by electrode potential blend technique in order to utilize capacitances of anode and cathode efficiently. Subsequently, the supercapacitor is studied in the electrochemistry systematically. The results show that power density is up to 737 W kg −1 as energy density is 31 W h kg −1 . Meanwhile, the capacitance retention rate remains 88% after 5000 cycles. It is a meaningful guide for exploring efficient energy storage equipment that appropriate vacancies are injected into electrode materials, and optimal potential windows are obtained via electrode potential blend technology.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 10
·期 1
·325-334
·
IF 7.779
Zhida Li,Chunyue Zhang,Yang Yang,Shanshan Pi,Yongjie Yu,Chengfeng Wan,Baiqin Zhou,Weixiang Chao,Lu Lu
Cobalt phosphides (CoPx) as a representative of transition metal phosphide (TMP) catalysts show great potential for highly-efficient electrocatalytic water splitting for H2 production. However, the current synthetic strategies of CoPx are complex and time-consuming. Herein, a novel, facile and fast molten salt strategy for one-step synthesis of CoPx (CoP/Co2P) was first proposed. Moreover, the molten salt's strong polarization force endows CoPx with abundant phosphorus vacancy (PV) defects. The synthesized CoPx show impressive catalytic activities towards both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under alkaline conditions. This enables the overall water splitting to reach the current densities of 10 and 100 mA cm−2 driven by only 1.75 and 1.90 V voltage, respectively. Mechanism investigation reveals that PV defects lead to the optimization of the electronic structure, decreased energy barriers of intermediates’ formation, and enhanced electronic conductivity, all of which boost the electrocatalytic activity. This study provides a paradigm of using molten salt for the synthesis of advanced TMPs, which not only simplifies the synthetic procedures, but also provides insight into defect engineering that involves the use of molten salt medium to obtain a better activity.
研究领域:
材料科学
·
电化学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Tingting Tang,Yanfang Teng,Kuoteng Sun,Yanhan Liu,Zhendong Gao,Tayirjan Taylor Isimjan,Jingya Guo,Jianniao Tian,Xiulin Yang
Crystalline and amorphous catalysts offer disparate advantages in reducing the overpotential of the oxygen evolution reaction (OER). Crystalline phases provide excellent electrical conductivity, while amorphous phases offer abundant unsaturated active sites. This study explores a synergistic strategy that integrates these benefits to develop high-performance OER catalysts with enhanced activity and stability. By employing controlled annealing followed by phosphating, we engineered a transition from low-crystallinity MnP–Co3P/NF to high-crystallinity MnP–Co3(PO4)2/NF, effectively tuning the balance between conductivity and active site availability. Advanced spectroscopic characterization studies (including X-ray photoelectron spectroscopy (XPS), zeta potential analysis, ultraviolet photoelectron spectroscopy (UPS) and electrochemical measurements) reveal that the high-crystallinity MnP–Co3(PO4)2/NF catalyst exhibits superior hydrophilicity, an enriched concentration of phosphorus vacancies, and enhanced charge redistribution, collectively leading to significantly improved OER kinetics. The catalyst achieved low overpotentials of 281 mV at 50 mA cm−2 and 306 mV at 100 mA cm−2, with exceptional stability for 230 h at 100 mA cm−2, outperforming comparable systems and commercial noble metal catalysts. In situ studies revealed faster formation of the active CoOOH phase on high-crystallinity MnP–Co3(PO4)2/NF. This work provides valuable insights into designing efficient and durable OER catalysts for energy conversion applications.
研究领域:
催化化学
·
材料科学
·
电化学
·
能量转换
·
纳米技术
·
无机化学
✓ 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）