ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Xianchao Wang,Weirong Li,Yongchao Xu,Yanqin Xue,Dapeng Si,Runcheng Zhu,Junnan Liu,Chunliang Zhou,Ye Chen,Guiling Wang
NiCoP/C electrodes with hollow structure are prepared successfully by solvent thermal method and low temperature phosphorylation method, the effect of Co doping on the electrode performance is explored. The hollow sphere structure of NiCoP/C electrode brings out outstanding electrochemical properties. The results of electrochemical tests show that the NiCoP/C electrode delivers a specific capacity of 193.8 mAh g − 1 at 1 A g − 1 and only losses 6.7% capacity under a 5 A g − 1 of current density after 10,000 cycles. In addition, the asymmetric supercapacitor (ASC) device composed of NiCoP/C and activated carbon has an energy density of 53.7 W h kg −1 when the power density is 750 W kg −1 . The ASC device is also cycled for 10,000 cycles at a current density of 5 A g − 1 while the capacity loss is only 7.2%.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Kaixuan Kuang,Jiahui Wang,Xiuzhen Zheng,Jingbiao Ge,Huihui Xue,Sujuan Zhang,Sugang Meng,Shifu Chen
To improve the efficiency of photocatalytic H 2 production, many researches are widely studied on the microstructure regulation of cocatalysts, including morphology design, atomic doping, and heterostructures composite. Derived from Ni-Co MOF materials, hollow NiCoP (NCP) microspheres as electron acceptor can effectively promote the separation of photogenerated charge carriers (PCCs). With Zn 0.3 Cd 0.7 S (ZCS) nanoparticles supporting on the surface of NCP, a series of NiCoP/Zn 0.3 Cd 0.7 S (NCP/ZCS) composites were successfully prepared by electrostatic self-assembly and characterized by many tests. Under visible light illumination, 10 % NCP/ZCS catalyst had the best H 2 production rate (21.50 mmol g −1 h −1 ) with benzyl alcohol (PhCH 2 OH) as the sacrificial agent, about 45.74 times that of pure ZCS. Its apparent quantum yield (AQY) reached highest at 400 nm, which was about 18.94 %. Through a combination of photoelectric, PL and UPS experiments, a Z-scheme transfer model was proposed in the NCP/ZCS composite for highly efficient photocatalytic H 2 generation. For ZCS, the hollow structure of the NCP cocatalyst can improve the light utilization rate, increase the reaction active site and accelerate the electron transmission rate. This structural design of cocatalyst not only provides a new idea to understand the reaction process of photocatalysis, but also opens up new directions for the development of simple, efficient and low-cost cocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Jiefei Li,Xianrong Meng,Zehao Zhang,Mingyang Song,He Zeng
Replacing the conventional oxygen evolution reaction (OER) with the urea oxidation reaction (UOR) coupled with hydrogen evolution reaction (HER) represents a highly promising strategy for low-energy hydrogen production. In this study, we developed a novel nanosheet-assembled fan-shaped NiCoP electrocatalyst via a two-step hydrothermal-phosphidation method. Benefiting from its unique electronic structure and abundant active sites, the NiCoP catalyst requires only 1.12 V (vs. RHE) for UOR and an overpotential of 70 mV for HER to reach a current density of 10 mA·cm −2 . Remarkably, no obvious degradation in activity was observed even after 50 h of continuous operation. Moreover, when employed in a urea-assisted electrolyzer (HER||UOR), the catalyst achieves 10 mA·cm −2 at a cell voltage of merely 1.37 V. This work provides new insights into the development of low-cost and energy-efficient urea electrolysis for hydrogen production.
研究领域:
材料科学
·
电化学
·
能源化学
·
纳米科技
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Xin Zhou,Xu-Feng Meng,Jun-Min Wang,Ning-Zhao Shang,Tao Feng,Zheng-Yang Gao,Hao-Xu Zhang,Xun-Lei Ding,Shu-Tao Gao,Cheng Feng,Chun Wang
Herein, ternary metal phosphides NiCoP nanoparticles supported on porous hexagonal boron nitride (h-BN) was fabricated via hydrothermal-phosphorization strategy. The as-prepared Ni 0.8 Co 1.2 P@h-BN exhibited excellent catalytic performance for the hydrogen generation from ammonia borane (AB) hydrolysis, with an initial turnover frequency of 86.5 mol(H 2 ) mol(Ni 0.8 Co 1.2 P) −1 min −1 at 298 K. The experimental outcome can be attributed to the synergistic effect between Ni, Co and P, as well as the strong metal-support interaction between NiCoP and h-BN. This study presents a new paradigm for supporting transition metal phosphides, and provides a new avenue to develop high performance and low cost non noble metal catalysts for hydrolysis of AB.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 37
·13079-13088
·
IF 4
Jiabo Wang,Yalin Fu,Peng Zhang,Jie Zhang,Xusen Ma,Jibo Zhang,Li Chen
Electrocatalysts with a high oxygen evolution reaction (OER) activity are very important for electrochemical water oxidation, but they are also challenging. In this study, N-doped graphene-like supported highly dispersed bimetallic NiCoP NPs as an efficient electrocatalyst for water oxidation were prepared by using cation exchange resin as a carbon source and by loading cobalt and nickel on D001 by a high-temperature calcination method. The designed electrocatalyst with bimetallic phosphide as the active center shows excellent OER catalytic performance, with an overpotential of 324 mV at 10 mA cm−2 and a corresponding Tafel slope of 97.28 mV dec−1. The increase in NiCoP-3@GL activity may be due to the increase in surface area (933.49 m2 g−1) caused by the irregular morphology, rich interface contact, and porous structure. In addition, the strong combination of NiCoP and GL improves the structural stability and durability of the electrocatalyst. After 5000 cyclic voltammetry tests, the performance of the catalyst decreased by 16.9 %. This work provides a new idea for designing efficient bimetallic phosphide electrocatalysts.
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
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 34
·18421-18430
·
IF 12.732
Honglei Wang,Chong Li,Jintao An,Yuan Zhuang,Shengyang Tao
2,5-Furandicarboxylic acid (FDCA), as an important monomer to produce biodegradable polymers, is a hot compound in the field of electrocatalysis. Designing high-activity and low-cost electrocatalysts for the production of high concentration FDCA is an urgent and challenging task. Here, a cactus-like NiCoP nanoplate was prepared as a robust electrocatalyst to enable 5-hydroxymethylfurfural (HMF) oxidation to FDCA at high concentration. In situ Raman spectroelectrochemical analysis investigated the dynamic structural evolution of the NiCoP surface during the electrooxidation of HMF. The substituted Co atoms make the NiOOH active species easier to form on the NiCoP surface than Ni2P at low constant voltage, which promotes the oxidation of HMF into FDCA. The total potential of coupling the cathodic H2 reduction reaction with the anodic HMF oxidation reaction (HMFOR) is only 1.464 V when NiCoP is the electrode material. The design of the flow-through mode reactor optimized the mass transfer process in the reaction, and further improved the coupling efficiency. The conversion rate of HMF and yield of FDCA reach 98.7% and 98.8%, respectively, even when the concentration of HMF is as high as 300 mM.
研究领域:
电化学
·
催化
·
材料科学
·
可再生能源
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2024
·
IF 3.9
Xiaodong Chen,Xiaoling Luo,Xuefeng Zhang,Huize Wang,Yongcheng Li,Lifang Ye,Jiahua Zheng,Hao Li
Graphical Urchin-like NiCoP/CoP heterostructures have been developed through a three-step hydrothermal-oxidation-phosphorization synthesis process. The nano-architecture and electronic configuration can be regulated by adjusting the original Ni/Co molar ratio and the amount of phosphorus. Consequently, the optimal Ni 1 Co 2 P shows excellent performance in the hydrolytic dehydrogenation of ammonia borane. Furthermore, by combining infrared spectroscopy and isotope kinetics experiments, a possible reaction mechanism has been proposed. The exploration of stable, efficient, and low-cost catalysts toward ammonia borane hydrolysis is of vital significance for the practical implementation of this hydrogen production technology. Integrating interface engineering and nano-architecture engineering is a favorable strategy to elevate catalytic performance, as it can modify the electronic structure and provide sufficient active sites simultaneously. In this work, urchin-like NiCoP/CoP heterostructures are prepared via a three-step hydrothermal-oxidation-phosphorization synthesis route. It is demonstrated that the original Ni/Co molar ratio and the amount of phosphorus are crucial for adjusting the morphology, enhancing the exposed surface area, facilitating charge transfer, and modulating the adsorption and activation of H 2 O molecules. Consequently, the optimal Ni 1 Co 2 P heterostructure displays remarkable catalytic properties in the hydrolysis of ammonia borane with a turnover frequency (TOF) value of 30.3 mol H2 ⋅ min −1 ⋅ mol metal −1 , a low apparent activation energy of 25.89 kJ ⋅ mol −1 , and good stability. Furthermore, by combining infrared spectroscopy and isotope kinetics experiments, a possible mechanism for the hydrolysis of ammonia borane was proposed.
研究领域:
材料科学
·
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Hua-Shuai Hu,Yang Li,Ya-Ru Shao,Ke-Xin Li,Gao Deng,Chong-Bin Wang,Yuan-Yuan Feng
The main energy consumption of industrial water electrolysis is electric energy, which accounts for ca . 80% of the total cost of water electrolysis . Developing highly efficient bifunctional electrocatalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential to reduce the energy consumption. Herein, nickel foam (NF)-supported NiCoP nanorod array catalyst is prepared and used for HER and OER. Not only at a small current density (10 mA/cm 2 ), but also at the commercially required high current density (≥500 mA/cm 2 ), NiCoP/NF catalyst shows excellent bifunctional properties with extremely low overpotential and high stability. Small overpotentials of 60 and 253 mV are needed to drive the current density of 10 mA/cm 2 for HER and OER, respectively, and the cell voltage of overall water splitting is only 1.55 V. At the high current density of 500 mA/cm 2 , the overpotentials are 180 and 365 mV, and the corresponding cell voltage is only 1.83 V. Furthermore, the cell voltage hardly changes within 24 h of overall water splitting test, which makes the catalyst have promising applications in the industrial water electrolysis. The high performance of NiCoP/NF outperforms the commercial RuO 2 -Pt/C couple and most of the bifunctional Ni/Co-based catalysts reported so far.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Fang Wang,Mengjuan Xu,Jinyu Ma,Yiming Li,Jiao Zhang,Zhengguo Zhang,Shixiong Min
Porous carbon membrane-based bifunctional electrodes (NixCoyP@CSA) are developed by direct carbonization followed by vapor-phase phosphidation of Ni2+/Co2+-crosslinked starch aerogel. During the carbonization and phosphidation processes, the crosslinked starch framework is transformed into a hierarchically porous, conductive, and mechancially strong carbon membrane while the Ni2+/Co2+ species are concurrently converted into embedded carbon-coated NixCoyP nanoparticles with a loading exceeding 40 wt%. Benefitting from hierarchically porous structure, excellent wettability, abundant active sites, the best NiCo2P@CSA electrode exhibits a high areal specific capacitance (Ca) of 9.41 F cm-2 at 2 mA cm-2, a volumetric capacitance (CV) of 115.0 F cm-3 at 20 mA cm-3, and a NiCo2P loading-based mass capacitance (Cm) of 1108.9 F g-1 at 0.2 A g-1, in a three-electrode system. In addition, an asymmetrical supercapacitror (SC) assembled by paring NiCo2P@CSA and activated carbon/Ni foam (AC/NF) exhibits a high Ca of 2.46 F cm-2 at 2 mA cm-2, an energy density of 0.41 mWh cm−2 at the power density of 1.1 mW cm−2, and a 75 % capacitance retention with a unit coulombic efficiency after 10000 cycles. In addition, the NiCo2P@CSA can also be directly used as a binder-free bifunctional electrode for electrocatalytic water splitting, requiring low overpotentials of 192.4 and 418.5 mV to achieve a current density of 100 mA cm-2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively, and it exhibits superior durability in both HER (>100 h at 20 mA cm-2) and OER (>40 h at 20 mA cm-2).
研究领域:
材料科学
·
能源化学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2023
·Vol. 10
·期 11
·e202201166
·
IF 4
Xinlei Wei,Shaoxing Su,Qingcheng Zhang
Graphical High energy supercapacitors : NiCoP@NiFe-LDH nanoflakes array has been grown on nickel foam as the binder-free electrode for supercapacitor, which delivers a high specific capacitance of 2216 F g −1 at 1 A g −1 and good rate capability of 1038 F g −1 at 20 A g −1 , as well as a high energy density of 57.4 W h kg −1 and good cycling stability in asymmetric supercapacitor device. Layered double hydroxides (LDHs) are attractive electrode materials for supercapacitors due to their high theoretical capacitances and adjustable compositions, but also subjected to their intrinsic poor electrical conductivity and easy structure collapse properties. To resolve these intractable issues, LDHs are usually integrated with high conductivity and specific surface areas (SSAs) matrixes. Herein, NiCoP@NiFe-LDH nanoflakes array has been successfully grown on nickel foam by a facile phosphorization and subsequent hydrothermal process. The hierarchical porous structure, large SSA, as well as the strong interfacial reactions between NiFe-LDH and conductive NiCoP layer has enabled NiCoP@NiFe-LDH to deliver quantities of electroactive sites, fast ion diffusion and facile electron transfer, hence remarkably boosting the supercapacitive performance. Therefore, NiCoP@NiFe-LDH electrode has achieved a high specific capacitance of 2216 F g −1 at 1 A g −1 and retained 1038 F g −1 at 20 A g −1 , whose specific capacitance and rate capability are much higher than those of NiCoP and NiFe-LDH electrodes. In addition, NiCoP@NiFe-LDH is assembled with an activated carbon electrode to fabricate an asymmetric supercapacitor, which displays a high energy density of 57.4 W h kg −1 and good cycling stability with 88.2 % capacitance retention after 5000 cycles. Therefore, the binder-free electrode composed of hierarchical NiCoP@NiFe-LDH nanoflakes array is promising for use in energy storage.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Kai Li,Min Ma,Lisi Xie,Yadong Yao,Rongmei Kong,Gu Du,Abdullah M. Asiri,Xuping Sun
In this work, we demonstrate the first use of NiCoP nanosheet array on Ti mesh (NiCoP NA/Ti) as an efficient catalyst for hydrolysis of NaBH 4 in alkaline media . This catalyst shows a low activation energy of 52.68 kJ/mol for NaBH 4 hydrolysis meanwhile the hydrogen generation rate can achieve 3016.79 mL/min/g (NiCoP) at 303 K, outperforming most reported Co-based noble-metal-free catalysts and some noble-metal catalysts. Remarkably, the catalyst exhibits high recyclability , durability and controllability for on-demand hydrogen generation in alkaline NaBH 4.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
ShiLin Xu,Teng Kong,Zhanlei Li,Man Zhang,Yidong Miao,Zipeng Feng,Jiqiu Qi,Fuxiang Wei,Qingkun Meng,Yaojian Ren,Lei Zhu,Peng Cao,Zhuangsu Kang,Danyang Zhao,Yanwei Sui
Designing novel electrocatalysts with excellent catalytic activity for efficient water splitting is necessary to achieve the large-scale H 2 /O 2 production from renewable resources. In this study, a facile hydrothermal method followed by low-temperature phosphorylation treatment was employed to fabricate a nanocage of prussian blue analogue encapsulating NiCoP nanoparticles (NiCoP@PBA), which was derived from the layered double hydroxide precursor. As a bifunctional non-precious metal electrocatalyst, NiCoP@PBA demonstrates superior performance in KOH electrolyte water splitting, with overpotentials of 59 mV for electrocatalytic hydrogen evolution reaction (HER) and 263 mV for oxygen evolution reaction (OER) at 10 mA cm −2 . The catalyst also exhibits low Tafel slopes of 54 mV dec −1 for HER and 120 mV dec −1 for OER, reflecting efficient charge transfer kinetics. DFT simulations show that the Co–N moieties at the heterogeneous interface of NiCoP@PBA can optimize the surface electron distribution and energy states, thus facilitating efficient electron-hole pair separation, significantly enhancing catalytic activity for both HER and OER process, and significantly extending the electrocatalyst's service life . Our approach can be extended to more non-precious metal electrocatalysts , which is significant for the design of efficient bifunctional water splitting electrocatalysts.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 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）