INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Adil Raza,Azhar Ali Haidry,Zhengjun Yao,Talha Amin,Muhammad Ahsan,Razan A. Alshgari,Saikh Mohammad
It is shown that replacing non-noble metals with noble metals in photocatalytic water splitting is pivotal for increased and sustained hydrogen production. However, the challenge persists in designing and developing a cost-effective, highly active catalyst with effective carrier separation and providing sufficient H + reduction sites to enhance photocatalytic H 2 evolution efficiency. Herein, a series of S-scheme Cu 2 ZnSnS 4 /g-C 3 N 4 (CZTS/CN) heterojunction composites were prepared via the hydrothermal method, followed by comprehensive characterizations for in-depth investigation. The TEM image exhibits a clear interface, showing the heterojunction formation between CZTS and CN nanosheets. The results show that incorporating CZTS cocatalyst significantly improves CN photocatalytic hydrogen evolution reaction (HER) and its performance is notably influenced by CZTS to CN mass ratio. Among CZTS/CN heterojunction composites, the 5% CZTS/CN heterojunction composite exhibited a significantly improved HER of 243.64 μmol g −1 h −1 , which is 29.4 and 7.08 folds superior as compared to CN (8.29 μmol g −1 h −1 ) and CZTS (34.42 μmol g −1 h −1 ), respectively. The mechanism study revealed that the excellent superior H 2 evolution performance resulted from the established internal electric field (IEF) in p-n heterojunction, which expedites the efficient separation and migration of photoinduced carriers coupled with the distinctive flower-like configuration of CZTS offering a substantial surface area and enough active reduction sites for photocatalysis process. This work presents a rational design and an inexpensive and efficient heterojunction photocatalysis system suitable for diverse applications.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Guo-li Chen,Huai-yao Wang,Yong-zhi Liu,Xiao-ming Huang,Guang-ming Yin
In this paper, nanowool ball Ni 3 Se 2 , rod NiSe and multistage Ni 3 Se 2 were prepared. Multilevel Ni 3 Se 2 was doped with Fe, Co and Mo respectively to prepare composite catalysts. The prepared materials were characterized by UV, XRD, SEM-EDS and XPS . The results show that the composite catalysts with multi-level Ni 3 Se 2 and Mo have special morphology and high purity. The HER performance of the composites was tested using an electrochemical workstation, and the results show that at a current density of 10 mA cm −2 , the overpotentials of Ni 3 Se 2 , Ni 3 Se 2 /Fe, Ni 3 Se 2 /Co and Ni 3 Se 2 /Mo are 71, 71, 3 and 37 mV, respectively; At a current density of 100 mA cm −2 , their overpotentials are 396.9, 373.6, 321.8 and 290.1 mV, respectively. Their Tafel slopes are 227, 169, 145 and 137 mV dec −1 , respectively. The R ct s of Ni 3 Se 2 , Ni 3 Se 2 /Fe, Ni 3 Se 2 /Co and Ni 3 Se 2 /Mo are 1.63, 1.47, 1.15 and 0.90Ω, respectively. After the comparison of the electrochemical HER performance, it is found that the Ni 3 Se 2 /Mo composite catalyst has good HER performance.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Hongyao Xue,Alan Meng,Tongqing Yang,Zhenjiang Li,Chunjun Chen
Introducing vacancy defects and unique morphology is an effective strategy to improve the catalytic performance of transition metal compounds. However, precisely controlling the amount of vacancy defects remains challenging. Here, we propose a facile and efficient hydrothermal accompanying an annealing method to synthesize a series of Mn-doped CoO nanomaterials with controllable oxygen vacancies and unique morphology. The oxygen vacancies amount can be precisely controlled by adjusting the Mn-doping content and is positively correlated with catalytic performance. It was found that the oxygen vacancies amount can reach up to 38.2% over the Mn-doped CoO nanomaterials, resulting in ultra-high hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalytic activity (HER: 25.6 and 37 mV at 10 mA cm −2 ; OER: 301 and 322 mV at 50 mA cm −2 ) under both basic and acidic conditions, while reaching 10 mA cm −2 for an ultra-low cell voltage of only 1.52 V, which exceeds that of Pt/C/RuO 2 and all reported non-noble metal oxide catalysts. The DFT calculations reveal oxygen vacancies can optimize H* and HOO* intermediates adsorption free energy, thus improving the HER and OER performance. Interestingly, the Mn-doped CoO with rich oxygen vacancies exhibits excellent antibacterial properties in vitro of biomedicine. This work provides new ideas and methods for the rational design and precise control of vacancy defects in transition metal compounds and explores their potential application value in electrochemical water splitting and biomedical fields.
研究领域:
材料科学
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电化学
·
生物医学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Lin Wu,Jie Feng,Zhijuan Zou,Kunpeng Song,Chunmei Zeng
It’s still a challenge to design reasonably efficient catalyst based on non-noble metal for water decomposition. Herein, we prepared a self-supported S-NiFe/NFF catalyst by sulfurated NiFe-based metal–organic framework on the NiFe foam (NFF) through a simple solvothermal method. Benefiting from the direct contact with the conductive NiFe foam matrix, the electronic environment of the active site regulated by heteroatomic oxygen and sulfur, and the positive synergistic effect between nickel and iron, the catalyst S-NiFe/NFF shows outstanding electrocatalytic activity for oxygen evolution (OER) and hydrogen evolution (HER) reactions with a low overpotential of 174 mV and 150 mV at a current density of 10 mA cm −2 in alkaline electrolyte, respectively; and the S-NiFe/NFF‖S-NiFe/NFF cell only needs 1.50 V battery voltage to reach the current density of 10 mA cm −2 . This work reports a highly efficient water decomposition catalyst, which indicates that non-noble metal-based electrocatalysts have great potential applications in the water electrolysis field, and provides a basis for rational design and synthesis of MOF-derived catalysts with unique structures.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 19
·4876
·
IF 3.1
Hao Li,Feng Chen,Xinyang Wu,Dandan Wang,Yongpeng Ren,Yaru Li
In recent years, there has been significant interest in transition-metal sulfides (TMSs) due to their economic affordability and excellent catalytic activity. Nevertheless, it is difficult for TMSs to achieve satisfactory performance due to problems such as low conductivity, limited catalytic activity, and inadequate stability. Therefore, a catalyst with a heterostructure constituted of a nickel–iron-layered double hydroxide, nickel sulfide, molybdenum disulfide, and cerium dioxide was designed. At the current density of 10 mA cm−2in an alkaline solution, the catalyst exhibits a HER overpotential of 116 mV. In addition, an overpotential of 235 mV@150 mA cm−2was displayed for OER. The catalyst showed a good retention rate (94.7% for HER, 98.6% for OER) after 160 h stability tests. The excellent electrochemical performance is attributed to the following points: 1. The self-supporting three-dimensional hierarchical structure provides abundant sites, fast ion diffusion channels, and electron transfer paths, and ensures structural stability. 2. The strong interfacial electron interaction between Ni3S2/MoS2heterojunction and NiFe-LDH improves the OER reaction kinetics. 3. The Ce3+and oxygen vacancies in CeO2promote the dissociation of H2O and promote the HER reaction kinetics. This approach paves the way for developing highly efficient electrocatalysts for various electrochemical applications.
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 COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Boyan Dai,Xinyu Wei,Liang Chen,Xiaolong Bao,Qin Zhong,Hongxia Qu
The investigation of highly efficient metal–organic framework (MOF) electrocatalysts represents a pivotal challenge in enhancing the overall efficiency of water electrolysis. In this study, we present a co-liganding method based on molecular regulation, in which succinic (s.a), adipic (a.a), and decanedioic (d.a) acids are employed to modify the original ligand H 2 BDC-based bimetallic NiFe-MOF to obtain dual-ligand NiFe-MOF electrocatalysts with excellent OER and HER performance (NiFe-MOF s.a, NiFe-MOF a.a, and NiFe-MOF d.a). Notably, NiFe-MOF d.a performs the best, particularly in 1 M KOH solution, with an OER overpotential of 242 mV and an HER overpotential of 116 mV at a current density of 10 mA cm −2 , and it demonstrates excellent stability under alkaline conditions, outperforming several recently reported Fe/Co/Ni-based catalysts. Bader charge and Mulliken charge calculations alongside experimental characterization data indicate that long-chain dicarboxylate ligands can influence the morphology, oxygen vacancy formation, and electronic structure of NiFe-MOFs. XPS and XRD analyses after the OER reveal that the four NiFe-MOFs undergo structural reorganization, with NiFe-MOF d.a having more unsaturated metal sites and more oxygen vacancies, promoting greater conversion of the MOF to NiOOH and FeOOH, which is beneficial for improving the OER performance. The density of states (DOS) results from DFT calculations demonstrate that the d-band center of NiFe-MOF d.a is relatively low, indicating that the adsorption energy of H* is reduced, which can promote the release of H 2 . Furthermore, the hydrogen adsorption free energy (ΔG H* ) values of the Fe and Ni active sites within NiFe-MOF d.a are closer to zero, thus accelerating the HER kinetics. This work paves new pathways for realizing dual-ligand MOFs.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Peng Cui,Tongheng Wang,Xuhai Zhang,Chongyang Ba,Yangkun Wu,Kai Peng,Yuqiao Zeng,Jianqing Jiang
Though various active electrocatalysts for hydrogen evolution reaction (HER) have been reported, it remains a challenge to develop efficient non-noble HER catalysts with pH-independent catalytic activity and high stability. In this work, novel porous NiCoCuP was prepared by combining the dynamic hydrogen bubble templated deposition with a low-temperature phosphorization process. The three-dimensional hierarchical porous structure provided the NiCoCuP with both self-supporting ability and ideal channels for fast mass transportation. As a consequence, the NiCoCuP foam exhibited excellent HER catalytic activity and outstanding durability over the entire pH range.
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
·
2023
·
IF 7.2
Yanbing Sun,Huimin He,Dezhou Zheng,Fuxin Wang,Fanyuan Meng,Wei Xu,Gang Huang,Jing Zhao,Daize Mo,Mark C. Wiliiams,Qi Feng
Recently, ruthenium telluride (RuTe 2 ) has received widespread attention as an effective HER catalyst. In this work, ultrafine and well-dispersed RuTe 2 nanoparticles anchored on nitrogen and boron co-doped graphene (RuTe 2 /BNG) was developed by freeze-drying and facile pyrolysis method, demonstrating a brilliant HER performance. The overpotential of RuTe 2 /BNG at the current density of 10 mA cm −2 is only 34 and 16 mV in 0.5 M H 2 SO 4 and 1.0 M KOH solution, respectively. More importantly, the RuTe 2 /BNG can also maintain significantly robust HER stability during long-term chronopotentiometry measurements. The outstanding HER activity of RuTe 2 /BNG should be ascribed to its properties with abundant defects, large specific surface area, high electronic conductivity and short mass transfer path. Our work offers a new path to fabricate efficient HER catalysts by homogeneously anchoring RuTe 2 on B, N co-doped graphene.
研究领域:
材料科学
·
催化
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2024
·
IF 1.3
Ying Geng,Chun-yong Zhang,Lin Zhu,Hao-yu Wang,Ji-rong Bai,Jing-jing Huang,Zhen-long Zhao
s Polymer catalyst electrodes have good electrical conductivity, high mechanical strength and other characteristics, which have good prospects in the future market of green and low carbon. In this paper, the electrode of PEDOT polymer catalyst is studied, and the electrochemical performance of the electrode is improved by doping different metals. This study describes the design of PEDOT-Co 3 O 4 @Mn 3 O 4 /Mn 2 O 3 catalysts by simple solvothermal synthesis. As a catalyst in the hydrogen evolution reaction (HER), the overpotential of the same polarization curve is much smaller than that of PEDOT, with a Tafel slope of 118.21 mV dec ‐1 , by electrochemical and characterization analysis. In the test of the supercapacitor performance, it has a large specific capacitance of 1298.5 Fg -1 and a small electrical impedance (0.21 Ω). After 2000 cycles of CV test, the capacitance remains 87.76 %, and the curve shape is stable, which proves that it has good electrochemical performance. Our results confirm the materials have great application prospects in HER and capacitors.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Ge Meng,Han Tian,Lingxin Peng,Zhonghua Ma,Yafeng Chen,Chang Chen,Ziwei Chang,Xiangzhi Cui,Jianlin Shi
Developing high-efficiency hydrogen evolution reaction (HER) catalysts is of great interest for the large-scale high-purity hydrogen production , which, unfortunately, is largely blocked by the sluggish kinetics of the electro-chemical dissociation step of water molecules. Herein, a MOF-derived method has been developed to prepare Ru nanoparticles-anchored sponge-like WNO embedded in N-doped carbon layers (Ru@WNO-C). The fabricated catalyst Ru@WNO-C (Ru: 0.9 wt%) shows excellent HER catalytic activity and long-term stability with the overpotentials of 172, 358 and 24 mV at 10 mA/cm 2 in 0.5 M H 2 SO 4 , 1 M Na 2 SO 4 and 1 M KOH, respectively. More impressively, the overpotentials, especially in neutral medium, decrease markedly during the durability tests owing to the catalyst structure activation after residual Zn species leaching. The enhanced catalytic activity of Ru@WNO-C during operation is mainly attributed to the in-situ electron donation from Ru to W, leading to the easier cleavage of highly polarized H‒OH bond of water molecules and thus endowing Ru@WNO-C with excellent HER catalytic performance in non-acidic solution.
研究领域:
材料科学
·
电化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Mutian Zhang,Ziying Ji,Shijie Pan,Xiang Liu,Wei Zheng,Jiajia Wang,Guobing Ying
In this study, Fe-doped Co3O4 nanoparticles were synthesized using a hydrothermal method followed by ultrasonic cell disruption to enhance the alkaline hydrogen evolution reaction (HER) performance. Through a dual-modification strategy combining elemental doping and morphology engineering, structural characterizations confirmed that Fe doping induces lattice distortions and optimizes the electronic structure, while ultrasonic cell disruption effectively reduces particle size to ~50 nm and increases active site density. The 10Fe-Co3O4 Ultrasonicated Nanoparticles (UNPs) catalyst showed remarkable HER performance, with overpotentials of 210.7 mV and 264.0 mV at 10 and 100 mA/cm2, respectively, and a Tafel slope of 75.2 mV/dec in 1 M KOH. DFT calculations indicate that Fe doping improves water adsorption, lowers energy barriers in the Volmer and Heyrovsky steps, and shifts the d-band center, thereby accelerating HER kinetics. The 10Fe-Co3O4 UNPs catalyst also demonstrated excellent durability, maintaining stable performance over 24 hours under high current densities. This work highlights the potential of Fe-doped Co3O4 as a cost-effective, high-efficiency, non-noble metal-based catalyst for HER, providing valuable insights into catalyst design and advancing sustainable hydrogen production technologies.
研究领域:
材料科学
·
电催化
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Lian-Hua Xu,Hai-Bo Zeng,Xue-Ji Zhang,Serge Cosnier,Robert S. Marks,Dan Shan
Tuning the coordination environment between metal centers and organic ligands is a promising way to design of the precursors of electrocatalysts for water splitting or other renewable energy options. In this work, a novel coordinated polymer was prepared feasibly in polyvinyl pyrrolidone (PVP) aqueous solution using aminotrimethylene phosphonic acid (ATMP, L 1 ) and 2-methylimidazole (MeMI, L 2 ) as ligands with the ratio of 2:5, Co 2+ and Zn 2+ as metal centers. Based on the concept of acid-base neutralization reaction, the proton-transfer induced “deprotonation and protonation” for L 1 and L 2 , respectively. Thus, the coordination was dominated by the deprotonated L 1 . Owing to also partial of protonated L 2 adsorbed as “counter ions”, carbonization of the obtained precursor at 800 °C under N 2 atmosphere endows the pyrolysis product with nitrogen-doped carbon supported metal pyrophosphate (M 2 P 2 O 7 @NC). Thus, the resulting M 2 P 2 O 7 @NC exhibits the enhanced and durable ORR and HER performance. For ORR in 0.1 M KOH, an enhanced onset potential (0.925 V vs. RHE), half wave potential (0.793 V vs. RHE) and diffusion limiting current (6.132 mA cm −2 ) can be obtained comparable to those of Pt/C. For HER in 0.5 M H 2 SO 4 , it only needs an over potential of 180 mV to realize a current density of 10 mA cm −2 .
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
危险品化学品经营许可证（带存储）