ChemElectroChem
·
2022
·Vol. 9
·期 15
·e202200523
·
IF 4.782
Minmin Wang,Wenwu Song,Xu Miao,Li Zhou,Xunyue Wang,Yanfeng Tang
Graphical Let's split !: A low-cost and high-efficiency NiCoP/Mo 3 Se 4 multifunctional catalyst was reported for highly efficient full water splitting. The abundance interfaces in NiCoP/Mo 3 Se 4 played a great role in optimizing the electronic structure of the nanoheterogeneous to efficient charge transfer. As expected, a low voltage of 1.90 V was needed to drive full water splitting at the current density of 400 mA cm −2 . The simultaneous manipulation of the catalytic activity and intrinsic electrical conductivity in a unified system is difficult yet meaningful to unravel the possible strategy that can enhance the water splitting performance. In this work, a low cost and highly efficient NiCoP/Mo 3 Se 4 nano-heterogeneous bifunctional catalyst was reported for full water splitting. Further analysis revealed the abundance interfaces in NiCoP/Mo 3 Se 4 played a great role in optimizing the electronic structure of the nanoheterogeneous to efficient charge transfer. As expected, a low voltage of 1.90 V was needed to drive full water splitting at the high current density of 400 mA cm −2 .
研究领域:
材料科学
·
催化化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yutong Chen,Rong Wu,Jianyong Yue,Dezheng Kong,Chen Zhang,Shunhang Wei
Photocatalytic overall water splitting (POWS) is an efficient technology that converts solar energy into H 2 energy, holding significant importance in the realms of energy and the environment. As a visible-light photocatalyst, ZnIn 2 S 4 , despite being an ideal low-dimensional semiconductor for photocatalytic overall water splitting, has its performance therein affected by poor charge separation. The present study reports the successful synthesis of a novel Bi 4 NbO 8 Cl/ZnIn 2 S 4 :Mo Z-scheme heterojunction via a hydrothermal method. Under AM 1.5G irradiation, the POWS H 2 evolution rate was measured at 84.8 μmol g −1 h −1 , while the O 2 evolution rate was determined to be 47.0 μmol g −1 h −1 . Under simulated solar light irradiation, Bi 4 NbO 8 Cl/ZnIn 2 S 4 :Mo heterojunction exhibits an apparent quantum efficiency (AQE) of 0.22 % at 420 ± 20 nm and a solar-to-hydrogen (STH) conversion efficiency of 0.026 %. UV–Vis–NIR spectroscopic analysis unequivocally demonstrated a significant enhancement in the utilization efficiency of the Bi 4 NbO 8 Cl/ZnIn 2 S 4 :Mo Z-scheme heterojunction in the near-infrared light region compared to the pristine ZnIn 2 S 4 and Bi 4 NbO 8 Cl. This improvement extends the spectral absorption boundary of the photocatalyst, allowing efficient capture of a considerable proportion of low-energy photons in sunlight. Unique charge transfer mechanism of Z-scheme heterojunction was revealed by in-situ XPS and EPR tests. Z-scheme heterojunction effectively promoted the respective enrichment of electrons and holes generated by photo-excitation in ZnIn 2 S 4 :Mo and Bi 4 NbO 8 Cl, thereby improving the performance of POWS. This study not only establishes an experimental foundation for the design and construction of Z-scheme heterojunctions but also explores a new approach to augment the utilization efficiency of the near-infrared solar spectrum.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yachao Xu,Zhong Zhou,Peng Yu,Ying Wang
Synergistically tuning electronic states at the atomic level to facilitate photocatalytic overall water splitting is a challenge. However, elucidation of the role of specific electronic states of Znln 2 S 4 (ZIS) in regulating both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) is still scarce, making it difficult to accurately predict the actual photocatalytic performance. Here, the substitution of Zn sites with Al atoms was found to modulate the potential difference of the ZIS surface domain heterojunction structure, and electrons were further transferred to CuS to form a built-in field that promotes charge separation. When Al doping is present on the ZIS surface, ZIS exhibits p-type semiconductor properties, which leads to the formation of p-n junctions within Al-CuS/ZIS itself. Due to the large work function and metallic properties of CuS, and Al-CuS/ZIS as a whole tends to form a Schottky heterojunction, and the two heterojunction structures synergistically promote the migration of photogenerated carriers. In addition, the Al doping changes the electronic states around the ZIS, allowing the Al ZIS to promote the adsorption of O* and H* during OWS. The solar-driven photocatalytic overall water splitting efficiency of Al-CuS/ZIS is as high as 153.6 (HER) and 73.1 (OER) μmol/h g −1 , which is about 10 times that of ZIS. This work opens the possibility to design efficient photocatalytic materials through tunable composition and electronic structure.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Renke Bi,Bing Han,Yijie Shen,Jialong Liu,Zhiyu Wang
Sunlight-driven photocatalytic overall water splitting (OWS) is a promising approach for solar-to-chemical energy conversion. However, its realization with a single photocatalyst by one-step excitation has been extremely limited due to the rapid recombination of photogenerated charges, slow surface redox kinetics, and undesired reverse reactions. Herein, we sought to enhance the OWS performance of SrTiO3 (STO) by exploring the synergistic effects of different kinds of metal/oxide dual cocatalysts. The results show that the Pt/CrOx-STO system had a superior activity, which achieved stoichiometric water splitting with H2/O2 evolution of 1814.17/1020.47 μmol g–1 h–1 under simulated sunlight, without using any sacrificial reagents. The enhanced efficiency can be attributed to the improved interfacial transport of photogenerated charges and the boosted surface kinetics. Importantly, the CrOx layer served as a selective membrane that prevented the O2 diffusion and facilitated H+ transport, while partially covering the highly active site of Pt nanoparticles, thus significantly inhibiting the reverse recombination reaction of H2 and O2. In particular, this dual catalyst system emphasized a low dependence on the properties of the substrate material and is therefore widely applicable and economical. This work demonstrated the potential of the Pt/CrOx dual cocatalyst modification strategy for optimizing photocatalytic OWS, providing a pathway toward selective and sustainable conversion of H2O to H2 and O2.
研究领域:
材料科学
·
可再生能源
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Yutong Chen,Rong Wu,Guoan Lin,Jianyong Yue,Dezheng Kong,Chen Zhang,Shunhang Wei,Xiaoxiang Xu
Photocatalytic overall water splitting (POWS) was a promising technique for sustainable hydrogen provision that could potentially tackle the current energy and environmental challenges. As a visible-light-active photocatalyst, ZnIn2S4 was an ideal candidate for POWS yet was characterized with a low efficiency due to poor charge separation and improper surface reactions. Here, ZnIn2S4 was modified by doping Mo and depositing with bifunctional cocatalyst for efficient POWS under sunlight. Charge separation and photodeposition of Pt and CrOx was accelerated by Mo introduction to promote surface POWS reactions and suppress reverse reactions. Under simulated sunlight irradiation, the modified ZnIn2S4 achieved POWS with an apparent quantum efficiency (AQE) of 0.17% at 420 20 nm and a solar-to-hydrogen (STH) conversion efficiency of 0.016%. Theoretical calculations indicated that Mo dopants introduced spin-polarized states at both conduction band bottom and valence band top, being spin-forbidden for charge recombination. This study served as a useful guideline for the design and development of efficient photocataysts for sunlight-driven POWS.
研究领域:
材料科学
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能源化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Miao Xu,Liang Huang,Youxing Fang,Lei Han,You Yu,Shaojun Dong
Co-based electrocatalysts were prepared by facilely low-temperature multi-step calcination using ordered mesoporous carbons (OMCs) and cobalt salt as the precursors. According to the chemical reaction of cobalt compound , the calcined product of each step could be used as different catalysts, which could complete the full water splitting in alkaline solution together. The introduction of ordered mesoporous carbon not only make the morphology was well inherited, but also enhanced the catalytic activity. The OMCs/CoP exhibited overpotential of 134 mV in acidic media and 143 mV in basic media with a current density of 10 mA cm −2 for hydrogen evolution reaction (HER). While, in basic solution, the OMCs/Co 3 O 4 had an overpotential value of 350 mV at 10 mA cm −2 for oxygen evolution reaction (OER). Moreover, the different Co-based electrocatalysts were assembled into one system for the full water splitting in 1 M KOH solution. This work provided a facile and efficient candidate for water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Mengtian Zhang,Suqin Ci,Hao Li,Pingwei Cai,Huimin Xu,Zhenhai Wen
It is highly desirable to develop low-cost and highly-efficiency electrocatalysts toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for implementing full water splitting in developing a sustainable green energy system . Herein, we report a reliable and facile anion-exchange reaction strategy for conversion of one-dimensional (1D) Co 3 O 4 nanowires (NWs) into CoP porous nanowires (PNWs). Notably, such evolution process provides the as-formed CoP PNWs with significantly improved defect sites and thus endows the CoP PNWs with a high electrochemical activity surface area. Accordingly, the CoP PNWs exhibit outstanding catalytic activity toward HER and OER when serving as bifunctional electrocatalysts, achieving a current density of 10 mA cm −2 with low overpotentials of 147 and 326 mV for HER and OER, respectively. We demonstrate the water splitting electrolyzer with such CoP PNWs electrocatalyst as cathode and anode can be driven by a double A battery and a solar panel (1.5 V). The advantages, including facile and low-cost synthetic process, high activity for HER and OER, endow the as-developed CoP PNWs to be one of the most promising candidates for full water splitting system.
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
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Wenyu Fan,Jing Hu,Jing Li,Panpan Tao,Yinan Liu,Yuru Zhou,Yitao He
Hydrogen emerges as a promising alternative to fossil fuels owing to its environmentally friendly and renewable nature. As the global energy crisis intensifies, the development of efficient bifunctional electrocatalysts for overall water splitting becomes increasingly imperative. Herein, we present the fabrication of ReS 2 /Ni 3 S 2 heterostructure on the nickel foam (NF) substrate via a facile one-step electrodeposition approach. The study uncovered a significant synergistic effect between ReS 2 and Ni 3 S 2 , thereby obtaining excellent catalytic activity in both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The remarkable electrocatalytic activity of the ReS 2 /Ni 3 S 2 /NF catalyst is evidenced by its exceptionally low overpotentials of just 116 mV and 307 mV for HER and OER, respectively, at a current density of 10 mA cm −2 . Furthermore, this catalyst demonstrates outstanding performance in the overall water splitting process, achieving a current density of 10 mA cm −2 at a low cell voltage of only 1.71 V and the catalytic activity remains stable over an extended duration of 100 h. This discovery not only paves the way for their broader practical applications in the future but also enriches the exploration of high-performance electrocatalysts.
研究领域:
电化学
·
能量转换
·
材料科学
·
催化
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Tiantian Wang,Yue Shi,Jiawei Fei,Jiawei Zhu,Lumin Song,Caixia Li,Tianrong Zhan,Jianping Lai,Lei Wang
Exploring earth-abundant electrocatalysts to replace platinum/iridium for acidic overall water splitting at high current density is an important challenge towards lowering the cost of green hydrogen production . Herein, we developed a new class of three-dimensional interconnected nanofibers (NFs) composed of ultra-small Ni-doped Co 3 O 4 nanoparticles (Ni-Co 3 O 4 NFs). Benefiting from the unique ultra-small Ni-doped Co 3 O 4 composition and three-dimensional interconnected porous structure, 13.4 % Ni-Co 3 O 4 NFs (Ni doping is 13.4 wt%) exhibits remarkable electrocatalytic performance in acidic media. Specially, in strongly acidic environments, high activity and high stability overall water splitting can be achieved at high current density. As evidenced by the fact that a voltage of 500 mA cm −2 can be achieved at only 1.86 V and operational stability can be maintained at 500 mA cm −2 for 100 h.
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 COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Huimin Jiang,Hong Wang,Kaiyu Liu,Zhe Feng,Sarah Alharthi,Mohammed A. Amin,Jianjian Lin
Transition metal fluorides because of the high electronegativity of fluorine may enhance the local electron density of the metal sites and promote water molecule dissociation and charge transfer. However, enhancing the intrinsic activity of fluorides to improve material stability remains a challenge. Herein, we develop an innovative four-step synthetic strategy (electrochemical deposition → co-precipitation → ligand exchange → in situ fluorination) to engineer three-dimensional porous Fe-doped CoF 2 nanocubes vertically anchored on MXene (Fe-CoF 2 /MXene/NF). This breakthrough achievement lies in the construction of a rapid mass transfer structure: porous cubes increase the contact area of reactants and create convection channels to achieve rapid bubble separation. The synergistic effect of Fe-doped CoF 2 and MXene not only optimizes the adsorption of intermediates but also promotes rapid electron transfer at the interface, and robust structural robustness. Remarkably, the optimized catalyst achieves low overpotentials of 121 mV (hydrogen evolution reaction, HER) and 210 mV (oxygen evolution reaction, OER) at 10 mA cm −2 , surpassing most reported transition metal fluorides. Notably, it enables efficient overall water splitting at an ultralow cell voltage of 1.52 V (10 mA cm −2 ) while maintaining 98 % activity after 100-h continuous operation. This work establishes a synergistic strategy to enhance catalytic activity by simultaneously modulating electronic configurations and accelerating charge transfer kinetics, achieved through rational structural design integrating organic framework derivatization, the coupling of metal doping with interfacial engineering.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
·
能量转换
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yuwei Gui,Zhetong Liu,Xiangbo Feng,Yufei Jia,Yimeng Zhang,Yongming Zhang,Haiyan Yang,Yi Zhang,Mingyang Li,Liang Liang,Jian-Wen Shi
Electrocatalytic water splitting (EWS) for hydrogen production is considered an ideal strategy for utilizing renewable energy , reducing fossil fuel consumption, and addressing environmental pollution issues. Traditional noble metal electrocatalysts have excellent performance, but their cost is high. Developing efficient, stable, and relatively inexpensive dual functional electrocatalysts is crucial for promoting large-scale EWS hydrogen production processes. Herein, a simple one-step electrodeposition method was used to grow nickel–iron phosphorus-sulfides (NiFePS) on the surface of hydrophilic treated carbon cloth (CC). The resultant NiFePS/CC with a phosphorus to sulfur ratio of 1:4 exhibited the best electrocatalytic performance, requiring only −91 mV and 216 mV overpotentials to generate the current densities of 10 mA·cm −2 in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. When it was used as a bifunctional electrocatalyst to overall water splitting (OWS), a voltage of 1.536 V can generate a current density of 10 mA·cm −2 . The excellent electrocatalytic performance can be ascribed to two factors: 1) the CC with excellent conductivity serves as a growth substrate, reducing the impedance of charge transfer from the electrode to the electrolyte and accelerating the electron transfer rate; 2) The large number of ultra-thin nanosheets formed on the surface of the catalyst increase the electrochemical specific surface area , expose more reaction sites, and thus improve the electrocatalytic reaction performance. This work provides a new approach for designing efficient non-noble metal electrocatalysts for water splitting.
研究领域:
电化学
·
材料科学
·
能源工程
·
催化
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2024
·
IF 6
Yuru Zhou,Jing Hu,Yinan Liu,Wenyu Fan,Panpan Tao,Rui Yang,Haitao Huang,Xun Cao,Haijin Li,Siwei Li
Designing noble metal-free electrocatalysts remains a challenge for the oxygen evolution reaction (OER) in alkaline solutions. In this study, we present a facile electrodeposition approach coupled with an in situ anodic oxidation method to synthesize NiOOH–MnS/NF on nickel foam (NF), successfully creating NiOOH–MnOOH/NF heterojunctions to boost OER performance under alkaline conditions. The heterojunction's synergistic effect significantly modulates the adsorption energy of the rate-determining step (RDS), thereby enhancing the intrinsic electrocatalytic activity of the NiOOH–MnOOH/NF electrocatalyst. Furthermore, the introduction of SO42− leads to a variable degree of electron loss in both Mn and Ni, reducing adsorption strength of the OER intermediates and thus optimizing reaction kinetics. The as-prepared NiOOH–MnOOH/NF electrocatalyst demonstrates exceptional OER performance in 1.0 M KOH, achieving a current density of 100 mA cm−2 with a Tafel slope of 52.3 mV dec−1 and a minimal overpotential of 391 mV. Utilizing NiOOH–MnOOH/NF as a bifunctional electrode for overall water splitting (OWS), the system operates at a low potential of 1.66 V at 10 mA cm−2, showcasing its excellent durability. This work offers novel insights and promising prospects for the advancement and practical application of non-precious metal electrocatalysts in the field of electrocatalytic water splitting.
研究领域:
电化学
·
材料科学
·
催化
·
能量转换与存储
✓ 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）