ACS Nano
·
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
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
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
·
催化反应
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产品关联
DOI
高影响因子
Micro & Nano Letters
·
2019
·Vol. 14
·期 2
·163-167
·
IF 0.975
Meiling Yang,Mi Mao,Yu He,Jiangang Zhou,Yili Ge,Gongwu Song
This work integrated zero-valent copper (ZVC) onto the surface of zeolitic imidazolate framework (ZIF) to form hybrids of ZVC/ZIF-8 as a non-noble catalyst for catalytic reduction of PNP as a reliable model reaction. The ZVC/ZIF-8 exhibited superior catalytic properties and good recyclability after the fabrication. 6%ZVC/ZIF-8 hybrids complete the reduction process in 2 min with a rate constant estimated to be 2.39 min −1 . The study’s findings explored a simple and powerful way to incorporate metal ions into the backbones of open framework materials without losing their properties.
研究领域:
材料科学
·
环境化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Xinwei Jiang,Qiang Liu,Chuchu Cheng,FangShu Xing,Cheng Chen,Caijin Huang
Developing a suitable and low-cost co-catalyst is highly desired for promoting photocatalytic water splitting of H 2 production. Herein, we adopted a simple in situ photodeposition strategy by coupling Mn 0.5 Cd 0.5 S with non-noble co-catalyst Ni 2 P to construct Ni 2 P/Mn 0.5 Cd 0.5 S composites and achieved obviously improved H 2 amount (31.83 mmol/h/g) in visible-light region, which is nearly 2.8 times than that of pure Mn 0.5 Cd 0.5 S. Such photocatalytic performance is in a relatively superior position among Mn x Cd 1−x S-based photocatalysts . The apparent quantum efficiency of Ni 2 P/Mn 0.5 Cd 0.5 S-7 composites reaches 32% at 420 nm. Through optical and photoelectrochemical measurements, a possible mechanism was proposed, it was found that the interface between metalloid Ni 2 P and Mn 0.5 Cd 0.5 S contacts closely, which facilitates transfer and separation of charge carriers, thus promotes the reduction of H + to H 2 . This study provides a new design of cut-price, high-efficiency photocatalyst for H 2 evolution.
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
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 24
·12513-12519
·
IF 8.867
Jinxing Zhang,Weifeng Yao,Cunping Huang,Penghui Shi,Qunjie Xu
Research and development of high efficiency non-noble metal cocatalysts for solar photocatalytic hydrogen production have been aiming at a long-term goal of a renewable hydrogen economy. This research reports an active and stable tungsten phosphide (WP) cocatalyst as a potential replacement for Pt and Pd noble metal cocatalysts. WP nanoparticles are synthesized via a simple wet chemical process using less expensive and earth abundant materials. The synthesized WP cocatalyst nanoparticles are ball-milled and loaded onto the surface of a CdS photocatalyst, forming a WP/CdS composite. During visible light photocatalytic hydrogen production via the photocatalytic oxidation of an aqueous ammonium sulfite solution, the WP/CdS has shown high photocatalytic activity and stability in comparison with Pt and Pd noble metal cocatalysts. It is found that the 4.0 wt% WP loaded CdS photocatalyst can achieve as high as a 155.2 μmol h−1 hydrogen evolution rate, which is 11.67 times higher than that of the pure CdS photocatalyst and at about 1/3 of the hydrogen production rate (510.4 μmol h−1) of 0.5 wt% Pt loaded Pt/CdS. Electrochemical characterizations of the WP cocatalyst indicate that WP has high electrocatalytic activity and an efficient charge transfer rate between CdS and WP nanocrystals. These are the key factors responsible for the enhanced photocatalytic activity of the WP/CdS photocatalyst.
研究领域:
材料科学
·
可再生能源
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产品关联
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
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电化学
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DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 5
·1429-1438
·
IF 6.367
Fu Liu,Xingzhong Guo,Yang Hou,Fan Wang,Chang Zou,Hui Yang
Electrochemical water splitting provides a prominent route towards clean energy conversion and storage, while unsuitable catalysts restrict its application. Core–shell hierarchical heterostructure materials with strong synergistic effects based on non-noble metal elements have been developed to compensate for inadequacy. In this work, a core–shell hierarchical heterostructure Co9S8/Ni3S2@NiFe-LDH electrocatalyst was prepared via hydrothermal and electrodeposition methods. The resultant Co9S8/Ni3S2@NiFe-120 electrocatalyst consists of Co9S8 substrates as the core and NiFe-LDHs as the shell, and exhibits excellent overall water splitting electrocatalytic activity with a low overpotential of 229 mV for the oxygen evolution reaction (OER), and 151 mV for the hydrogen evolution reaction (HER) and a full cell voltage of 1.62 V at 10 mA cm−2 current density. The core–shell heterostructure constructed by electrodeposition endows the catalyst with outstanding stability and low degradation in long-term catalytic processes as shown by continuous chronopotentiometry tests at current densities of 50, 100 and 200 mA cm−2 for 72 h. The as-prepared core–shell hierarchically heterostructural Co9S8/Ni3S2@NiFe-120 with high-efficiency and good-durability is a promising bifunctional electrocatalyst towards practical applications in overall 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
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Shasha Tang,Jie Yao,Hongyuan Liu,Yan Zhang
Although considered as a promising candidate for photocatalytic bromate reduction, TiO 2 is restricted by its fast recombination of photo-induced charge carriers. In this paper, a series of efficient photocatalysts (TiO 2 /TC) were prepared by coupling commercial titania (P25) with titanium carbide MXene (Ti 3 C 2 ) via a simple hydrothermal method, where Ti 3 C 2 was utilized as a noble-metal-free cocatalyst. Batch experiments of photocatalytic bromate removal by TiO 2 /TC composites were conducted under UV irradiation. Its performance and mechanism were also investigated. The results showed that more than 95% of bromate could be removed by TiO 2 /TC-1 composite (Ti 3 C 2 and P25 in a mass ratio of 1%) in 15 min, and its removal rate was 4.87 times higher than that of pure P25. The photocatalytic reduction of bromate by TiO 2 /TC was an interfacial reaction, and bromide was the main product. The greatly improved activity of TiO 2 /TC composites was attributed to the improved separation efficiency of photogenerated charge carriers and narrower band gap. TiO 2 /TC-1 composite exhibited a longer lifetime (6.05 ns) of electron-hole pairs than pristine P25 (4.31 ns). Moreover, due to its excellent electrical conductivity, Ti 3 C 2 functioned as “an electron sink” to accumulate photoinduced electrons from the excited P25. And the Schottky barrier formed in the tight Ti 3 C 2 -P25 interface provided a unidirectional channel for electron transfer , facilitating the separation of electron-hole pairs. In addition, TiO 2 /TC-1 composite had a good stability in bromate removal. This work highlights the potential of Ti 3 C 2 as a noble-metal-free photocatalytic cocatalyst and explores the possible expansion of the application of MXene.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Xuefei Wu,Junxiang Chen,Zhenhai Wen
To explore highly active non-noble electrocatalysts toward full water splitting, the incorporation of other metal elements to the host electrocatalyst is required, especially for previously reported highly efficient MoO2–MoNi4 (MoNi in short). Herein, to lessen the energy cost in full water splitting, the vanadium-incorporated MoO2–MoNi4 (VMoNi in short) hybrid nanoarray self-supported on nickel foam is prepared through a simple way. Compared with the Mo–Ni binary electrocatalyst, vanadium incorporation can obviously boost oxygen evolution reaction (OER) activity while almost keeping the perfect hydrogen evolution reaction (HER) ability, for it merely requires 202 and 17 mV for 10 mA cm–2 working current density toward OER and HER, respectively. Furthermore, it displays outstanding performance toward full water splitting, merely requiring 1.45 V for 10 mA cm–2 and 1.61 V for 100 mA cm–2 in water electrolysis with keeping the voltage stable in tens of hours at 250 mA cm–2. This work highlights the significance in large-scale hydrogen production from water electrolysis with the help of exploring non-noble materials, an important milestone in converting the renewable energy to hydrogen energy.
研究领域:
材料科学
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能源转换
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Ying Yang,Daorui Wang,Lin Gu,Xinruo Luo,Suoying Zhang,Yang Ren,Qi Liu
Endeavors to curb the advanced, cost-efficient and ultra stable electrocatalysts for electrochemical water splitting is critically important for energy conversion. However, their limited electrocatalytic behavior caused by large particles (> 10 nm) has leaded to decreased active surface and interaction with the supporting matrix. Herein, we designed a three-dimensional networked multi-metallic phosphides nanosheet arrays in situ grown on nickel foam (NiCoP-Ni 2 P/NF), within ultrafine nanoparticles ( ca. 2.4 nm) evenly distributed on the skeleton, and the lattice of NiCoP is tensilely strained and contains rich phosphorous vacancies that induce localized compressive strain. Combining experimental investigation and theory calculations on hydrogen/oxygen evolution reaction (HER/OER), the as-established NiCoP-Ni 2 P/NF electrodes realize superior electrocatalytic performance is attributed to the strain effect, that is, tensile strain enhances OER while compressive strain facilitates HER. Moreover, the elaborately fabricated NiCoP-Ni 2 P/NF electrode can be cycled over 300 and 30 hours for hydrogen and oxygen evolution reactions at 10 mA cm –2 , respectively. The concept of lattice strain couples with phosphorous vacancies imposes the rational design of active and ultra stable non-noble metal electrocatalysts for sustainable hydrogen production.
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
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
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2019
·
IF 4.914
Jianhua Ge,Yujie Liu,Daochuan Jiang,Lei Zhang,Pingwu Du
Photocatalytic H 2 production via water splitting in a noble-metal-free photocatalytic system has attracted much attention in recent years. In this study, noble-metal-free Ni 3 N was used as an active cocatalyst to enhance the activity of g-C 3 N 4 for photocatalytic H 2 production under visible-light irradiation ( λ > 420 nm). The characterization results indicated that Ni 3 N nanoparticles were successfully loaded onto the g-C 3 N 4 , which accelerated the separation and transfer of photogenerated electrons and resulted in enhanced photocatalytic H 2 evolution under visible-light irradiation. The hydrogen evolution rate reached ∼305.4 μmol h −1 g −1 , which is about three times higher than that of pristine g-C 3 N 4 , and the apparent quantum yield (AQY) was ∼0.45% at λ = 420. Furthermore, the Ni 3 N/g-C 3 N 4 photocatalyst showed no obvious decrease in the hydrogen production rate, even after five cycles under visible-light irradiation. Finally, a possible photocatalytic hydrogen evolution mechanism for the Ni 3 N/g-C 3 N 4 system is proposed.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
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