RSC Advances
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2020
·Vol. 10
·期 55
·33444-33449
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IF 3.119
Jun Liu,Xue Zhao,Haibo Zhang
Today, metal-based nanomaterials play an increasingly important role in the energy, environment, medical and health fields. In order to meet the needs of various fields, it is necessary to continuously develop advanced technologies for preparing metal-based materials. Inspired by previous research, the results of a proof-of-concept experiment show that the hexahydro-closo-hexaborate anion (closo-[B6H7]−) in the borane cluster family has properties similar to NaBH4. Closo-[B6H7]− can not only convert common precious metal ions such as Au3+, Pd2+, Pt4+ and Ag+ to the corresponding zero-valence state, but also convert some non-precious metals such as Cu2+ and Ni2+ to the zero-valent or oxidation state. Closo-[B6H7]− moderate reduction to cause rapid aggregation of metal-based materials is not easy compared with NaBH4. Compared with closo-[B12H12]2−, closo-[B6H7]− achieves the conversion of Pt4+ to Pt0 under ambient conditions, and its reduction performance extends to non-precious metals. The excellent stability and easy modification characteristics determine the universality of the closo-[B6H7]− reduction strategy for metal ions.
研究领域:
材料科学
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化学
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能源与环境科学
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
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2023
·Vol. 28
·期 6
·2508
·
IF 4.6
Hong Qiu,Xiaohui Ma,Hongxia Fan,Yueyan Fan,Yajie Li,Hualei Zhou,Wenjun Li
Molybdenum-based cocatalyst being used to construct heterojunctions for efficient photocatalytic H2production is a promising research hotspot. In this work, CdIn2S4was successfully closely supported on bulk Mo2C via the hydrothermal method. Based on their matching band structures, they formed a Type Ⅰ heterojunction after the combination of Mo2C (1.1 eV, −0.27 V, 0.83 V) and CdIn2S4(2.3 eV, −0.74 V, 1.56 V). A series of characterizations proved that the heterojunction composite had higher charge separation efficiency compared to a single compound. Meanwhile, Mo2C in heterojunction could act as an active site for hydrogen production. The photocatalytic H2production activity of the heterojunction composites was significantly improved, and the maximum activity was up to 1178.32 μmmol h−1g−1for 5Mo2C/CdIn2S4composites. 5Mo2C/CdIn2S4heterojunction composites possess excellent durability in three cycles (loss of 6%). Additionally, the mechanism of increased activity for composites was also investigated. This study provides a guide to designing noble-metal-free photocatalyst for highly efficient photocatalytic H2evolution.Keywords:noble-metal-free;Mo2C;CdIn2S4;heterojunction;carrier separation
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2018
·
IF 5.091
Haitao Li,Ming Wang,Yiping Wei,Fei Long
A series of noble-metal-free NiS 2 -loaded g-C 3 N 4 hybrid composites were prepared via simple hydrothermal method. Benefited from the wider spectral response range and the effective separation of photoelectron-holes of g-C 3 N 4 -NiS 2 heterojunction catalysts, as well as the rich unsaturated active S atoms on the NiS 2 with S 2 2− , the composite catalysts has prominent photocatalytic performance for H 2 evolution. Remarkably, the optimal composite photocatalysts achieved an average hydrogen production rate as high as 715.83 μmol/h/g in 3 h under visible-light irradiation, which is 2.75 times as high as that of precious metal Pt (259.5 μmol/h/g) as a co-catalyst. Besides, the composite catalyst still shows prominent photocatalytic performance for H 2 evolution after three continuous photocatalytic reaction cycles for 9 h. This study provided a facile method to build a low-cost but effective metal sulfide co-catalyst for hydrogen production under visible light irradiation.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Ruitian Yan,Wenjie Zhao,Xiaoyang Duan,Taolin Yu,Weiping Cui,Weidong Quan,Yinsheng Chen,Dan Xu
Recently, MoSe 2 has exhibited limited development in the field of gas sensors owing to its low sensitivity and slow response/recovery. Herein, various noble metals (Pt, Pd, and Ag) were employed to dope the MoSe 2 nanoflower for enhancing its sensing capability to NO 2 . Compared to Ag and Pd modification, the Pt doped-MoSe 2 sensor displayed higher sensitivity, faster response rate, and better selectivity. Moreover, the 2.5 %Pt-MoSe 2 sensor had a large sensitivity of 2.45 to 32 ppm NO 2 , good repeatability, and a low detection limit of 0.1 ppm at 110 °C. The improvement in the gas-sensing response can be attributed to the spillover effect and catalytic sensitization of Pt. Moreover, the first principle calculations for the adsorption energy and density of states have confirmed that the MoSe 2 material can adsorb NO 2 more effectively by Pt doping. The Pt-decorated MoSe 2 material exhibits a promising prospect in the field of NO 2 gas detection.
研究领域:
材料科学
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传感器技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
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2025
·
IF 16
Ou Wang,Zhiheng Ma,Zhenggang Xue,Muyu Yan,Bao-Li An,Yongmei Zhao,Jiaqiang Xu,Xiaohong Wang
Enhancing the gas-sensing properties of metal oxide semiconductors using noble metals’ electronic and chemical sensitization functions is a common approach to develop high-performance gas sensors. However, the high cost and scarcity of noble metals pose challenges to sustainability. In this study, a non-noble metal MnFeCoNiCu high-entropy alloy (HEA) was designed as an alternative to noble metals to enhance the sensitivity of SnO2 and enable efficient, stable, and rapid detection of acetone (C3H6O). The MnFeCoNiCu HEA-loaded SnO2 demonstrated improved performance in C3H6O detection, including high selectivity (κ > 3), a high sensitivity (Ra/Rg = 4.17 at 0.5 ppm), a low detection limit (30 ppb), fast response and recovery time (4.6 s/5 s), long-term stability (over 50 days), and resistance to humidity (stable at 90% RH). The enhanced performance of the HEA is attributed to the fact that it possesses more valence electrons and the electrons can transfer and redistribute among different atoms, which leads to an increase in active oxygen species and catalytic sites, promoting electron sensitization. This study provides insights into designing and developing a highly catalytic, non-noble metal HEA for gas-sensing applications.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Xuan Zhu,Yuan Gao,Jianan Hong,Entao Zhang,Yu Xie,Jia Mao,Chenyu Xu,Yanwei Zhang
The synergistic coupling of optical and thermal effects for the comprehensive utilization of solar energy has garnered increasing attention in recent research. In this work, the synergistic coupling of solar photo and thermal effects was realized using a non-noble metal Ni cocatalyst loaded with Mg and Al codoped SrTiO 3 . In the photothermal synergistic decomposition of pure water, the efficiencies of H 2 and O 2 reached 1.011 mmol·g −1 ·h −1 and 0.497 mmol·g −1 ·h −1 , respectively. The hydrogen yield was almost 2.7 times higher than that of pure photocatalysis. It was found that the introduction of NiOOH significantly enhanced the separation and migration of photogenerated carriers, along with the significant thermal effect. A series of variable temperature characterizations confirm that the thermal effect in sunlight can enhance light absorption and reduce the carrier transport impedance of material, which significantly improves carrier utilization and further promotes hydrogen generation. This study provides an effective idea for the design of solar non-noble metal catalysts for hydrogen production by utilizing the photothermal synergy strategy.
研究领域:
材料科学
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能源化学
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催化反应
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2014
·Vol. 6
·期 11
·6173-6179
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IF 6.739
Yan Feng,Xiaohong Ma,Lin Han,Zhijian Peng,Jun Yang
Nanomaterials usually exhibit structure-dependent catalytic activity, selectivity, and stability. Herein, we report a universal approach for the synthesis of noble metal nanoparticles with a dendritic structure, which is based on the reduction of metal acetylacetonate precursors in oleylamine at a temperature of 160 °C. In this strategy, the metal acetylacetonate precursors are reduced into metal atoms by oleylamine and grow into metal nanoparticles, while oleylamine is simultaneously converted into oleylamide to protect the nanoparticles. The competition between particle aggregation and oleylamide passivation is essential to the formation of a large number of particle aggregates, which eventually grow into nanodendrites via Ostwald ripening process. In particular, in comparison with commercial PtRu/C catalysts, the alloy PtRuOs nanodendrites exhibited superior catalytic activity toward methanol oxidation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Matter
·
2024
·
IF 17.3
Youbing Li,Shuairu Zhu,Jia-Bo Le,Jun Lu,Xue Wang,Lu Chen,Haoming Ding,Ke Chen,Mian Li,Shiyu Du,Hui Wang,Runnan Zhang,Per O.Å. Persson,Lars Hultman,Per Eklund,Yongbo Kuang,Zhifang Chai,Qing Huang
M n+1 AX n (MAX) phases have attracted significant attention due to their structural diversity and potential applications. Designing MAX phases with single-atom-thick A layers featuring 4d/5d-orbital electronic elements is interesting work. Here, we present a comprehensive report on noble metal-based M 2 (A 1- x A′ x )C (M = V, Ti, Nb; A = Al, Sn, In, Ga, Ge; A′ = Ru, Rh, Pd, Ir, Pt, Au and combinations thereof; 0 < x ≤ 0.4) phases featuring A sublayers of 4d/5d-orbital electronic elements through an A-site alloying strategy. The chemical composition of MAX phases can be adjusted by selecting different M- and A-site elements, with morphology tailored by distinct C sources. Furthermore, the V 2 (Sn 0.8 Pt 0.2 )C (15.7 wt % Pt) catalyst showed better performance for hydrogen evolution reaction compared to the commercial Pt/C (20 wt % Pt) electrode. This study highlights the prospects of A-site alloying for the design of novel MAX phases with unique properties and promising applications in electrocatalysis and beyond.
研究领域:
材料科学
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化学工程
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Ying Duan,Pan Guo,Dong Sui,Dongsheng Deng,Tianliang Lu,Yanliang Yang
The development of a cost-effective catalyst for hydrogen evolution from ammonia borane is of importance for the application of AB as a hydrogen storage material. In this manuscript, a series of noble metal catalysts M@CuOx/C (M = Ru, Rh, Pd, and Pt) are prepared by the galvanic reduction method. The catalysts are characterized by XRD , TEM , EDS mappings and lines scanning, XPS , HAADF-STEM, and ICP-OES. The noble metal is highly dispersed on the surface of Cu nanoparticles . The morphology of Cu nanoparticles changed according to different metals after the introduction of noble metal and there has an interaction between the noble metal and Cu. The M@CuOx/C is used for the hydrolysis of AB. For the same metal catalyst, the activity of M@CuOx/C is increased by about 3–7 times than the corresponding M/C at 298 K. The Rh shows the highest TOF and lowest activation energy among the four noble metals.
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 33
·15963-15974
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IF 3.553
Wu Yanyan,Li Ying,Lü Zhe,Xu Lingling,Wei Bo
Developing efficient and durable oxygen evolution reaction (OER) electrocatalysts with non-noble elements is particularly urgent for electrochemical water splitting. Herein, we report heterostructural Ni 3 S 2 –Fe 5 Ni 4 S 8 hybrids directly grown on redox-NiFe foams (denoted as NFS/rNF) as excellent pre-catalysts for OER in 1 M KOH media. The electrochemical performance can be tuned by amount of sulfur source, and the optimized electrode only needs low overpotentials of 199 mV and 240 mV to attain 10 mA cm −2 and 100 mA cm −2 , respectively. Moreover, the overpotential is further reduced to 231 mV to deliver 100 mA cm −2 after multi-cyclic voltammogram scans, due to the exposure of abundant in situ generated Ni(Fe)OOH species. Excellent stability with continuous 40 h operation is also demonstrated. Our study provides a new strategy for direct synthesis of self-standing integrated hybrid electrodes for efficient and durable water oxidation.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Dongyan Shen,Yong Liu,Guangxing Yang,Hao Yu,Peng-Fei Liu,Feng Peng
The electrooxidation of carbon monoxide is a typical example of structure sensitivity in electrocatalysis for fuel cells. Understanding the structure sensitivity is crucial in designing highly efficient catalysts and elucidating reaction mechanisms. Conventionally, only the reactivity of active sites was considered and optimized. However, how the reactant chemically moves to the active site has not been well studied. In this work, we found that CO ad hopping is a general phenomenon on noble metal surfaces such as platinum, iridium, rhodium, and palladium in the case of CO monolayer electrooxidation. Differences in the performances of CO ad stripping on platinum nanoparticles with different surface structures reveal that the CO ad hopping rate is structure sensitive as well. Assisted by a diffusion modeling and density functional theory calculations, it is demonstrated that the structure sensitivity is as a result of a compromise between CO ad chemical diffusivity and reactivity with OH ad .
研究领域:
材料科学
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电化学
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理论计算
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
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2025
·
IF 3.3
Xiaodong Chen,Zhi Cheng,Jiao Li,Hongyu Chen,Siyuan Liu,Shuxian Wei,Zhaojie Wang,Xiaoqing Lu
Non-precious transition metal-based electrocatalysts with high activity are the promising candidates for substituting Pt- or Ru-based electrocatalyst in hydrogen evolution. In this study, we proposed a core-shell engineering to combine the amorphous NiCoP and crystalline Co2P (a-NiCoP/Co2P@NF), which requires an ultra-low overpotential of only 26 mV to achieve the benchmark current density of 10 mA cm-2. Furthermore, it achieves an industrial-level hydrogen evolution current density of 500 mA cm-2 with excellent stability. The superior catalytic performance and stability can be attributed to the hierarchical amorphous/crystalline interface and the electron-rich interfacial Co sites. Amorphous NiCoP shell can not only protect the internal Co2P from corrosion, but also provide a larger electrochemical active area. Together, the Co2P core provides fast electron transport and promotes H2 emission from the interfacial electron-rich Co sites. This work gives inspiration to the rational design of advanced core-shell structure between amorphous and crystalline.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）