JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Dexin Xu,Jing Yao,Xinzhi Ma,Yan Xiao,Chi Zhang,Wei Lin,Hong Gao
Electrochemical water splitting, the most direct and clean method used for the production of hydrogen, requires highly efficient bifunctional electrocatalysts that can accelerate hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) by overcoming their kinetics barriers. Herein, self-supported F, N codoping CoP nanosheets (denoted as FN-CoP NS) are prepared as efficient and stable bifunctional electrocatalysts. Codoping of F and N neutralizes the electronegativity of surface P-O by cleaving the Co-P-O of non-metallic P sites on the surface (O derived from the surface oxidation). This contributes to an increased Co 2+ content with considerable adjustable electronegativity and also optimizes HER and OER processes. As a result, FN-CoP NS requires 66 and 241 mV overpotentials to deliver the current density of 10 mA cm −2 during HER and OER, respectively. A full water electrolyzer equipped FN-CoP NS as both cathode and anode only require 1.57 V to drive the current density of 10 mA cm −2 and to sustain 50 mA cm −2 for 48 h. This work adjusts the electronic structure of metal phosphides by a double anion codoping strategy, which provides a reference value for the rational design of efficient bifunctional electrocatalysts.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yong Xu,Ping Wang,Di Tian,Man Zhang,Weili Dai,Jianping Zou,Shenglian Luo,Xubiao Luo
Photocatalytic CO 2 reduction has been regarded as an ideal method to simulate photosynthesis for achieving carbon neutralization. However, poor charge transfer efficiency limits its development. Herein, an efficient Co/CoP@C catalyst was prepared with compact contact of Co and CoP layer by using MOF as precursor. At the interface of Co/CoP, the difference in functionality between the two phases may result in uneven distribution of electrons, thus forming a self-driven space-chare region. In this region, spontaneous electron transfer is guaranteed, thus facilitating the effective separation of photogenerated carriers as well as boosting the utilization of solar energy. Furthermore, the electron density of active site Co in CoP is increased and more active sites are exposed, which promotes the adsorption and activation of CO 2 molecules. Together with suitable redox potential, low energy barrier for *COOH formation and easy desorption of CO, the reduction rate of CO 2 catalyzed by Co/CoP@C is 4 times higher than that of CoP@C.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xinli Yi,Lizhu Song,Shuxin Ouyang,Ning Wang,Huayu Chen,Jianbo Wang,Jun Lv,Jinhua Ye
The development of electrocatalysts for efficient water splitting is a pivotal and challenging task. Transition-metal phosphides (TMPs) have been known as one of the most promising candidates for the efficient hydrogen evolution reaction (HER) due to their favorable intrinsic reactivity. However, structural engineering related to the gas bubbles evolution and tiny regulation of components concerned with the electronic structure remained as a significant challenge that requires further optimization. Herein, the nanoarrays (NAs) composed of ultrasmall Co2P and CoP nanoparticle-embedded N-doped carbon matrix (Co2P&CoP@N–C) are prepared and demonstrated an overpotential of 62.8 ± 4.7 mV at 10 mA cm–2 in 1.0 M KOH. The nanoarray-structured electrocatalyst revealed the superaerophobicity and facilitates the detachment of the in situ formed hydrogen gas bubbles, ensuring abundant catalytic sites and electrode–electrolyte interface for the mass transfer process. The amount of P doping modulated the local electron density around Co and P atoms, which attains a favorable compromise to afford sufficient electrons for the electrocatalysis and inhibit the negative influence of H2 desorption. Significantly, the lowered overpotential induced by the electrocatalyst surface architecture is much stronger than that of the component content and promotes the electrocatalytic activity.
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Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Wenxuan Zheng,Lin Gao,Mingsong Fan,Zhiyu Dou,Lili Cui,E. Jin
To address the sluggish kinetics and limited current density in the alkaline hydrogen evolution reaction (HER), we designed and synthesized dandelion-like V-doped CoP anchored on carbon cloth (V–CoP-X) via a MOF-derived strategy involving hydrothermal growth and subsequent phosphidation. By precisely controlling the V content in the MOF precursor, we achieve tunable morphologies of V–CoP materials. Experimental analyses reveal that Lewis acid sites of V promote electron transfer and adjust the d-band centers of V–CoP. According to the results of experimental and density functional theory (DFT) calculations, the V-doped CoP lowers the water dissociation energy in alkaline media and optimizes the adsorption energy for H* (ΔGH*). These synergistic effects accelerate water dissociation kinetics as well as optimize adsorption and desorption behavior of H*, leading to improved HER activity in 1 M KOH and 0.5 M H2SO4. As a result, the optimal V–CoP electrode exhibits exceptional HER performance in diverse electrolytes, requiring low overpotentials of 69, 63 and 89 mV to obtain 10 mA cm−2 as well as 212, 254 and 401 mV at 500 mA cm−2 in 1 M KOH, 1 M KOH + 0.5 M NaCl and 0.5 M H2SO4, respectively. Remarkably, V-doped CoP possesses excellent long-term stability at large current density. This work presents a high-performance HER electrocatalyst while providing fundamental insights into the role of V doping in enhancing reaction kinetics.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Suci Meng,Pengfei An,Lijie Chen,Shichao Sun,Zhongkai Xie,Min Chen,Deli Jiang
Developing high-efficient and low-cost photocatalysts is of great significance yet challenging for photocatalytic hydrogen evolution. Herein, we report a 2D/2D Ru-modulated CoP nanosheets (Ru-CoP -x , where x refers the Ru-to-Co molar ratio)/g-C 3 N 4 nanosheets (GCN NSs) ternary hybrid as a photocatalyst for hydrogen evolution under visible light. The optimal photocatalyst 25% Ru-CoP-1:8/GCN NSs exhibits an excellent hydrogen evolution rate of 1172.5 µmol g −1 h −1 under visible light with a high apparent quantum efficiency (AQE) of 3.49% at 420 nm, which is close to Pt/g-C 3 N 4 photocatalytic system and higher than most reported transition metal phosphides (TMP)/g-C 3 N 4 photocatalytic system. Experimental results indicate that the higher photocatalytic hydrogen evolution performance can be mainly attributed to the binary Ru-CoP -x co-catalyst with efficient charge separation and promoted surface water reduction kinetics, and the 2D/2D self-assembly structure with strong interface Schottky effect and short charge transport distance. This study provides a new approach to develop cost-effective Pt-alternative co-catalysts for photocatalytic hydrogen evolution by incorporating a small amount of ruthenium into the transition metal phosphides.
研究领域:
材料科学
·
能源化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Yanyan Ma,Hongwei Zhang,Haofei Cong,Yuxiao Wang,Shuwen Xin,Peilong Xu,Yuanbin Qin,Guangxu Xu,Xiaochan Kang,Fengyun Wang
Transition metal phosphides (TMPs) are considered satisfactory anode candidates for sodium-ion batteries (SIBs) due to their high energy density and modest plateau. However, the TMPs anode suffers from poor cycling and rate properties owing to the negative effects of severe volumetric expansion and sluggish reaction kinetics. Herein, a novel structure of porous core/shell CoP@N-C nano polyhedral embedding on 2D MXene nanosheets (CoP@N-C/MXene) was synthesized by self-assembly and in-situ phosphorization methods. The porous CoP@N-C with the unique core/shell structure benefits the infiltration of electrolytes and alleviates the volumetric change. Besides, high-conductive 2D MXene nanosheets could enhance electrical conductivity and charge transfer kinetics, and effectively inhibit CoP@N-C pulverization and agglomeration. Based on the above advantages, the as-prepared CoP@N-C/MXene anode delivers an excellent cycling capacity, outstanding rate capability and low-temperature high-rate capability. This synthetic strategy of CoP@N-C/MXene architecture can be extended to other materials which are promising for SIBs electrodes.
研究领域:
材料科学
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电化学
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能源存储
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GREEN CHEMISTRY
·
2025
·Vol. 27
·期 8
·2276-2285
·
IF 9.2
Lixia Wang,Jiasui Huang,Jia Huang,Bowen Yao,Aling Zhou,Zhiyang Huang,Tayirjan Taylor Isimjan,Bao Wang,Xiulin Yang
Zinc–air batteries (ZABs) are considered a promising energy storage technology due to their high energy density and environmental friendliness. However, the development of efficient and durable oxygen reduction reaction (ORR) catalysts remains a challenge. Herein, we report the synthesis of a highly efficient CoP/Cu3P@NC catalyst using a Zn-MOF template, which was transformed into N- and C-doped bimetallic phosphides via high-temperature phosphating. The CoP/Cu3P@NC-based ZAB exhibits remarkable performance with an open-circuit voltage of 1.50 V, a peak power density of 215 mW cm−2, and a specific capacity of 691 mA h gzn−1, outperforming conventional Pt/C-based ZABs. The catalyst maintained 93.5% of its initial activity after 300 h of cycling, demonstrating its excellent long-term stability. Furthermore, CoP/Cu3P@NC was applied in flexible ZABs, achieving a power density of 74 mW cm−2 and showing stable performance under various bending conditions. The superior performance is attributed to the synergistic effects of Co and Cu, optimized structural properties, and high porosity, enhancing mass transfer and oxygen activation. These results suggest that CoP/Cu3P@NC is a highly promising ORR catalyst for next-generation ZABs, offering both high efficiency and durability in flexible and conventional energy storage applications.
研究领域:
材料科学
·
电化学
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Jing Su,Tan Li,Xin Liu,Qihui Song,Jianmeng Cen,Zhongyang Luo,Kaige Wang
The valorization of plastic waste via electrocatalytic conversion into value-added chemicals and hydrogen represents a promising sustainable technology, yet is hindered by the lack of efficient and cost-effective bifunctional catalysts. Herein, we develop a hierarchically structured cobalt phosphide nanoflower catalyst anchored on nickel foam (CoP-F@NF) through fluoride-mediated morphology control. Comprehensive characterization confirms the successful synthesis of crystalline CoP nanoflowers with homogeneous elemental distribution. When applied to polyethylene terephthalate (PET) hydrolysate electro-oxidation, CoP-F@NF exhibits exceptional activity, high formic acid selectivity (>95 %) and Faradaic efficiency (>86 %), attributed to synergistic effects of the CoP phase and nanoflower architecture that optimize mass/charge transport (Tafel slope: 110.12 mV dec −1 ). Mechanistic studies reveal the dominant reaction pathway: ethylene glycol → glycolaldehyde → glyoxal → formic acid. Simultaneously, CoP-F@NF demonstrates efficient hydrogen evolution reaction (HER) activity (Tafel slope: 117.7 mV dec −1 ), leveraging PET oxidation to replace energy-intensive oxygen evolution. In an integrated two-electrode system, CoP-F@NF achieves concurrent formic acid production (FE: >92 %, selectivity: >92 % at 2.0 V) and H₂ generation with superior stability over five cycles. Control experiments with CoO-F@NF and density functional theory calculations reveal that P-modulation elevates the Co d-band center (εd = −1.295 eV vs. -1.601 eV for CoO), optimizing intermediate adsorption strength for both anodic oxidation (weakened *CHO-CHO binding) and cathodic HER. This work establishes a noble metal-free route for plastic waste upcycling and green hydrogen production via electronic and morphological catalyst design.
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Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 17
·10893-10908
·
IF 12.732
Yuanyuan Zhang,Yunfeng Qiu,Zhuo Ma,Yanping Wang,Yongxia Zhang,Yuxin Ying,Yinan Jiang,Yixue Zhu,Shaoqin Liu
The simultaneous improvement of intrinsic activities and the number of active sites in electrocatalysts is the bottle-neck issue for H2 production. Herein, commercial CNTs serving as conductive kernels are in situ coupled with 3D ZIF-67 derived Co/CoP core-corona clusters. Such a hierarchical bead string nanostructure not only possesses highly exposed active sites, but also favours fast electron transfer for electrocatalytic kinetics. Our material shows excellent HER (η10 = −151 mV) and glucose oxidation reaction (GOR) performance, showing a smaller hybrid water splitting potential of 1.42 V compared to conventional water splitting (η10 = 1.74 V) for H2 production. DFT calculations indicate that the Schottky heterointerface at Co/CoP decreases the initial H2O dissociation energy barrier and possesses a thermoneutral H* adsorption free energy for the HER, as well as reducing the energy barrier for the GOR. Meanwhile, more oxidative cobalt oxyhydroxide favoured the GOR process. The present work opens a new avenue for designing Mott–Schottky multifunctional electrocatalysts for both energy-saving H2 production and value-added products.
研究领域:
材料科学
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能源化学
·
催化科学
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Sustainable Energy & Fuels
·
2025
·Vol. 9
·期 19
·5269-5277
·
IF 4.1
Xinyue Zhang,Fulei Liu,Jiachang Zhao,Jun Jin
Because of their great capacity to store lithium, cobalt-based phosphides are utilized as anode materials for lithium-ion batteries (LIBs). However, in practice, they are prone to capacity fading and volume expansion, which restrict their long-term use. Herein, a simple method was proposed to prepare CoP nanoparticles encapsulated in a Co-MOF-71 derived carbon layer (CoP/C). The carbon in the composites greatly improved the cycling stability and rate capability of CoP/C when compared with pure CoP. CoP/C exhibits a high initial discharge capacity of 823 mA h g−1, a cycling durability of 338 mA h g−1 over 100 cycles, a good initial coulombic efficiency of ca. 76%, and an excellent rate capability (1 A g−1: 318 mA h g−1 and 2 A g−1: 284 mA h g−1).
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Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 23
·5034-5044
·
IF 6.569
Yu Du,Gentian Yue,Zhang Lan,Yueyue Gao,Jihuai Wu,Furui Tan
Transition metal phosphates have aroused wide attention and been applied in the field of energy conversion due to their high catalytic properties and low cost, but magnetic metal phosphates are rarely used in DSSC. In this work, the magnetic CoP@FeP4 thin film was prepared on carbon paper (CP) using a two-step process and proposed as a counter electrode (CE) for dye-sensitized solar cells (DSSCs). The morphology of CoP@FeP4@CP with a silkworm-like structure is advantageous to enhance the catalytic ability for the interface reaction, establish a good connection between the electrode material and electrolyte, and accelerate the electron transmission. The characterizations using cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel curves all indicate that the CoP@FeP4@CP CE shows excellent electrochemical catalytic performance for the I−/I3− electrolyte. Under optimal conditions, a high power conversion efficiency of 9.88% is achieved for DSSC with CoP@FeP4@CP CE much higher than that of Pt (7.49%) and CoP@CP (8.73%) CEs. This phenomenon can be attributed to the unique chemical structure and the synergistic effect of CoP@FeP4@CP CE. CoP@FeP4@CP CE with the advantages of efficient, low cost, and facile synthesis is a promising alternative to the expensive Pt CE for the DSSCs in the future.
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APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Qiang Zhang,Wei-Bin Zhang,Peng Hei,Zhiqian Hou,Tingshuai Yang,Jianping Long
The self-supported transition metal phosphide with specific morphology and architecture has been investigated extensively due to excellent conductivity, stability, and morphologic diversity. In the work, cobalt phosphide with special nanoprism arrays in-situ grown on the nickel foam skeleton forms a typical three-dimensional open structure. It exhibits notable electrochemical performance when employed as an anode in a single electrode system, which owns a high mass specific capacitance (1349 F g −1 at the current density of 1 A g −1 , which is the highest compared with that in the extant literature), good rate capacity and cycle stability. Besides, pseudocapacitive contribution to the entire capacity is up to about 77%, revealing the nature of high mass specific capacitance of the as-prepared CoP@NF as the working electrode. Furthermore, an asymmetrical supercapacitor device has been fabricated using CoP@NF as an anode and CMK-3@NF as a cathode. It can deliver a high power density of 325 W kg −1 at the energy density of 24 Wh kg −1 and the specific capacitance retention of about 93% after 5000 cycles. The results demonstrate that CoP@NF with special nanoprism arrays is a promising potential candidate as the electrode material of supercapacitors and other energy-storing applications.
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