INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Jinxiao Ba,Wei Cai,Yifan Chen,Li Lin,Yule Huang,Xianghai Yu,Yihua Wang,Chengqun Xu,Donghua Fan,Lisong Yin
In this work, pure and homogeneous Ni incorporated CdS photocatalyst was prepared by vulcanization of ZIF material synthesized from Cd/Ni salt by solvothermal method . The prepared pure CdS photocatalysts by the vulcanization of ZIF material exhibits better catalytic activity due to its larger specific surface area. The introduction of Ni can further improve the hydrogen production activity. The effect of Ni incorporating amount and annealing temperature on the hydrogen production activity of CdS photocatalyst was researched systematically. The photocatalytic activity at 10 % Ni incorporated CdS sample is greatly enhanced after annealing at 700 °C, which is attributed to the effective doping of Ni into the CdS lattice by annealing. The average hydrogen evolution rate is 1644.6 μmol/g/h, which adds up to about 119 times that of normal CdS. The current research provides a simple and effective method for improving the photocatalytic activity of CdS.
研究领域:
材料科学
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催化
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能源材料
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 46
·24694-24700
·
IF 14.511
Hugang Zhang,Songliang Liu,Ziqiang Wang,Xinmiao Li,Kai Deng,Hongjie Yu,Xin Wang,You Xu,Hongjing Wang,Liang Wang
The rational design and engineering of high-performance and stable electrocatalysts for the borohydride oxidation reaction (BOR) is imperative for the development of direct borohydride fuel cells. In this work, we report a one-pot strategy for the self-assembly of Ni-doped hyperbranched PdCu nanocrystals (Ni–PdCu NCs) using polyethylene oxide as the structure-directing agent in the presence of bromide ions. Benefitting from the branched nanoarchitectures, high active sites, and trimetallic compositions, the as-fabricated Ni–PdCu NCs exhibit superior electrocatalytic performance to PdCu NCs and Pd/C towards the BOR in 1.0 M KOH containing 50 mM NaBH4, as well as better durability due to the higher resistance to BHx intermediates. The present work provides a facile route for the design of multi-metal electrocatalysts with a hyperbranched structure for direct borohydride fuel cells.
研究领域:
材料科学
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能源化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 7
·1460
·
IF 3.2
Jiajia Cui,Yueyue Sun,Chaofan Yin,Hao Wang,Zhengrong Liu,Zilin Zhou,Kai Wu,Jun Zhou
The development of symmetrical solid oxide fuel cells with identical cathode and anode is beneficial for thermal matching and reducing the cost. Herein, proton-conducting electrolyte and novel high catalytic activity electrode material for symmetrical solid oxide fuel cells are proposed. Ni-doping at the B-site of (Sr0.8Ce0.2)0.95FeO3−δ(SCF) indicates reduced cell edge lengths, cell volume, and a more porous honeycomb structure. The B-site elements in oxide tend to have a high oxidation state via Ni-doping. Simple doping modification in SCF causes better thermal matching between the electrode and electrolyte and form more oxygen vacancies at the operating temperature. At the anode side, Ni-doping improves the stability of the symmetric electrode in reducing the atmosphere. The polarization resistance of symmetrical cells for new electrode material is half of the original both in oxidation and reduction atmosphere, which indicates boosted electrochemical performance for the cathode and anode. At the same time, Ni-doping reduces the impedance activation energy of the anode reaction in symmetric cells. The output performance of the cell is 210.4 mW·cm−2at 750 °C and the thickness of the electrolyte is 400 μm, achieving a highly efficient symmetrical electrode in proton ceramic fuel cells. The new finding of materials provides a novel high efficiency symmetrical electrode and proposes guidance for the improvement of solid oxide fuel cells at a reduced temperature.
研究领域:
材料科学
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能源工程
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固体氧化物燃料电池研究
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wei-Xiao Li,Meng-Jiao Liu,Xiao-Yuan Wu,Sa-Sa Wang,Weiming Wu,Can-Zhong Lu
Porous Ni 2+ -doped Co 3 O 4 nanosheets were prepared by a combination method of electrodeposition and post-calcination. The catalytic activities of the as-prepared samples for the electrocatalytic nitrate reduction to ammonia were evaluated. It was found that the Ni 2+ -doped Co 3 O 4 sample with a Ni 2+ doping content of 20 % exhibited higher catalytic activity as compared with other samples. The outstanding catalytic activity of the 20 % Ni 2+ -doped Co 3 O 4 sample could be attributed to its porous nanosheet structure with rich oxygen vacancies, which was confirmed by SEM, XPS, TEM, EPR and operando EIS analyses. The DFT results further revealed that the increased hydrogen generation energy and nitrate adsorption, and the diminished rate-determining step energy barrier ensured Ni 2+ -doped Co 3 O 4 exhibited outstanding activity for the electrocatalytic nitrate reduction. Moreover, membrane-less electrocatalytic nitrate reduction was coupled with methanol oxidation by using the oxygen vacancies-rich Co 3 O 4 electrocatalyst. The Faradic efficiencies for the electroreduction of nitrate to ammonia and the electrooxidation of methanol to formate could keep at 98 % and 99 % after multiple cycles, respectively, revealing a good stability of the reported hybrid system for the membrane-less electrocatalytic ammonia synthesis.
研究领域:
材料科学
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电化学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2023
·
IF 9.6
Chao Wang,Jingyi Zhang,Li Wang,Jianmin Feng,Liqun Wang,Lei Dong,Conglai Long,Dejun Li,Feng Hou,Ji Liang
The crucial step for splitting water is the oxygen evolution reaction . The key to promote this reaction lies in the catalyst. Molybdenum disulfide , as a two-dimensional material with molybdenum and sulfur atoms stacked, is especially suitable as a doping platform to develop high-performance OER catalysts. Fe/Co/Ni ternary transition metal combination has always been a highly active catalytic site for OER. Heteroelement of Fe/Co/Ni doping is expected to effectively modify the local electronic configuration of matrix materials and thus enhances their electrocatalytic OER capability. With this in mind, we report a simple in-situ hydrothermal doping of MoS x nanowires on iron‑nickel alloy foam with ternary transition metal of Fe/Co/Ni. This ternary transition metal of Fe/Co/Ni doped f self-supported electrode (denoted Fe/Co/Ni-MoS x /INF) displays outstanding OER performance in terms of small overpotentials of 214 and 263 mV at current densities of 10 and 100 mA/cm 2 , respectively, in alkaline solution. It was far better than the commercial Ir/C catalysts (253 and 434 mV@10 and 100 mA/cm 2 ). The Tafel slope is about 48.1 mV/dec. Moreover, Fe/Co/Ni-MoS x /INF also has an excellent catalytic stability without any obvious performance decay after 20 h operation. This work contributes to the investigation of high-efficiency OER catalysts based on transition metal-doped MoS x and offers a substitute for noble metal catalysts.
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
SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Wen-Tao Li,Xiao-Dong Zhang,Xin Guo
Ni-doped SnO 2 nanofiber array was prepared from a modified electrospinning technique followed with hot-press and calcination, which impart the nanofiber with high crystallinity as well as good adhesion to the substrate. The nanofiber array consists of well-aligned straight fibers with an average diameter of ∼200 nm and length of several millimeters. Each fiber consists of rutile-structured polycrystals with an average grain size of ∼5 nm. Conductometric gas sensors were developed from the nanofiber array using magnetron sputtering. These sensors show excellent performance for NO 2 detection at 250 °C, including high response (90.3 under 20 ppm), fast response and recovery (40 s/18 s), and above all, excellent selectivity. Beneficial for electron transport, the nanofiber array offers better device performance over random nanofibers on sensing response and time for recovery. In addition, the NO 2 sensing mechanism was probed with detailed DRIFT and XPS analysis.
研究领域:
材料科学
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环境科学
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传感器技术
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Guolin Zhang,Qi Xu,Hui Huang,Fei Zhou,Liangyun Yu,Qi Chen,Jiarong Yang,Yanli Xiao,Qi Zhang
The extensive use of fossil fuels has resulted in large amounts of carbon dioxide being emitted into the air and has led to a number of environmental problems. Given the abundance of both carbon dioxide and sunlight in the earth’s atmosphere, converting solar energy into chemical energy by photothermally catalyzing carbon dioxide hydrogenation to produce methanol is a potential strategy. By using the coprecipitation approach, a Ni-doped In2O3 catalyst was created, and its compositional valence, morphology, specific surface area, band gap, and other properties were assessed by XRD, XPS, TEM, BET, H2-TPR, CO2-TPD, and UV–vis characterization. Methanol production from carbon dioxide hydrogenation is stable and effective under lower pressure (1 MPa) photothermal settings, with an efficiency of 63.4 gMeOHh–1kgcat–1, which is approximately 120% higher than that of pure In2O3 under the same circumstances.
研究领域:
环境科学
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催化化学
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能源科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Peng Qiu,Lei Wu,Kun Cheng,Shaowen Wu,Huiying Qi,Chunyan Xiong,Baofeng Tu
Fuel flexibility is one of the significant advantages of solid oxide fuel cells (SOFCs). The utilization of methane in SOFCs can not only reduce fuel costs, but also greatly expand its application scenarios, which is of great significance to the commercial development of SOFCs. However, when methane is directly used, Ni-based cermet anode suffers from coking, which seriously affects the durability of the cell. To alleviate the coking issue, a reforming layer outside the Ni-based anode-supporter was proposed in this study, and Ba 0.9 (Zr 0.8 Y 0.2 ) 1- x Ni x O 3-δ (BZYNi x , x = 0.05, 0.1, 0.15 and 0.2) was used as reforming layer material. Among BZYNi x catalysts, BZYNi 0.2 exhibited excellent catalytic activity toward dry reforming of methane, and methane conversion was as high as 85% at 750 °C. The excellent catalytic durability and coking-resistance of BZYNi 0.2 were also confirmed. When BZYNi 0.2 reforming layer was applied, the single cell fueled with CH 4 –CO 2 fuel showed significantly improved electrochemical performance, durability and coking-resistance. The utilization of BZYNi 0.2 reforming layer provides guidance for solving the coking issue of SOFC cermet anodes when fueled with hydrocarbon.
研究领域:
能源材料
·
催化化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Xueying Yang,Jian Zhang,Ming Xu,Xiangdong Zhang,Junlian Ren,Haina Bai
The advanced oxidation technology of persulfate has great potential in removing pollutants. Appropriate bimetallic activation method has obvious synergistic effect on the formation of free radicals and non-free radicals, and can also promote the electron transfer process. Therefore, in this paper, Ni was doped on the iron-based metal organic framework (MIL-88A) to form bimetallic catalyst and used as persulfate activator for oxytetracycline (OTC) degradation. The introduction of Ni increased the specific surface area of the catalyst and significantly improved its catalytic performance. Within 30 min, the degradation efficiency of 5 mg/L OTC reached 81.30%. The used catalyst can be simply recovered by standing, and the catalytic stability is high. The composition of main reactive oxygen species (ROS) in pollutant decomposition was clarified through the analysis of degradation mechanism. In addition to typical •OH、SO 4 •− and O 2 •− , non-free radical 1 O 2 was also generated. Based on LC-MS detection and toxicological experiments, the possible degradation pathways were proposed and the toxicity was analyzed. This material provides a new insight for activating PS to remove refractory organic compounds, and promotes the application of Fe-MOF materials in environmental pollution remediation.
研究领域:
环境科学
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污染治理
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Fang Yuan,Jialin Liang,Shixuan Wang,Jiajia Wang,Bo Chen,Gaofeng Wang,Chunquan Li,Zhiming Sun
Herein, in-situ self-assembly of ZIF-67 derivative on the surface of stilbite and the doping of Ni ions into the Co 3 O 4 lattice were simultaneously achieved through a one-step calcination method. The obtained Ni-doped Co 3 O 4 /stilbite (Ni-Co-AS) exhibited efficient photo-assisted thermal catalytic purification of formaldehyde (HCHO). The results showed that after being regulated by Ni-doped, the Ni-Co-AS composite could achieve efficient photo-assisted thermal catalytic degradation of HCHO driven solely by light. The HCHO removal rate and mineralization rate could reach 93.04 % and 88.60 % within 3 h, respectively. In addition, in order to further improve the photothermal conversion performance of Ni-Co-AS, the composite fiber felt (Ni-Co-AS/F) was prepared from Ni-Co-AS. The conditional experiments show that thermal catalysis is the main mechanism in the photothermal catalytic degradation of formaldehyde by Ni-Co-AS/F. Compared to the pure thermal catalysis (180℃), the presence of light helps to reduce the reaction temperature (120℃) and plays a role in co-catalysis. Ni-Co-AS/F could achieve a higher mineralization rate than that of Ni-Co-AS composite (91.66 %) within 3 h due to the better dispersion and quantum transmission efficiency. In dynamic and long-term degradation experiments, the Ni-Co-AS/F exhibited excellent catalytic performance under the appropriate temperature (35 ± 0.5℃) and humidity (45 ± 3 %) required for the HCHO degradation. This work could effectively provide an efficient and sustainable catalytic material for air pollution control.
研究领域:
环境催化
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材料科学
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纳米技术
·
空气污染控制
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2019
·Vol. 35
·期 3
·440-448
·
IF 1.071
Lyu Cong,Li Yicheng,Fang Chen,Feng Wei,Sun Wentian,Zhang Qihui
Peroxymonosulfate(PMS) has received increasing attention as viable technology for recalcitrant organics removal from polluted waters. Although promising, alternative heterogeneous catalysts with stable structure, strong hydrophilicity, environmental friendliness and excellent catalytic performance are highly desirable to facilitate the wide industrialization of PMS. In this work, Ni doped CoOOH catalyst was employed as PMS activator. Ni dopant had a significant influence on the morphology, structure and catalytic performance of CoOOH, Ni 0.2 Co 0.8 OOH exhibited the best catalytic performance. Reaction rate of Ni 0.2 Co 0.8 OOH was 2, 4, and 4.4 times that of CoOOH, CoFe 2 O 4 and Co 3 O 4 , respectively. Moreover, Ni 0.2 Co 0.8 OOH/PMS system had potential application to organic pollutants and displayed a great catalytic activity over a broader pH value( e.g. , 4–10). More importantly, Ni doping accelerated the transformation of Co(III) and Co(II) and formed active species CoOH + and NiOH + , which were responsible to the enhancement of PMS activation. • OH, \(\overline G \) and 1 O 2 were detected, indicating both non-radical and radical processes in the Ni 0.2 Co 0.8 OOH/PMS system. These findings provide a promising alternative to mixed-metal oxyhydroxides catalysts for PMS activation, demonstrating a great potential in environmental remediation and wastewater treatment.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Xingyue Liu,Zhiyong Liu,Bo Sun,Xianhua Tan,Haibo Ye,Yuxue Tu,Tielin Shi,Zirong Tang,Guanglan Liao
Organometal trihalide perovskite solar cells (PSCs) with carbon counter electrode (CE) have attracted tremendous interest due to their remarkable properties such as low cost and high stability. However, carbon-based PSCs always suffer from much lower power conversion efficiency (PCE) than the counterparts with noble metal cathode. Herein, we demonstrate a carbon-based planar heterojunction PSC using high-crystallinity Ni-doped rutile TiO 2 as electron transport layer (ETL) for the first time, while copper phthalocyanine (CuPc) is introduced as hole transport layer (HTL). It is found that Ni doping can shift the Fermi level of the ETL upward and increase the charge mobility of the TiO 2 film, thus enhancing the charge transport and extraction. An optimized PCE of 17.46% was obtained after 0.01 M Ni doping, comparable to or even better than devices with state-of-the-art doped Spiro-OMeTAD as HTL and Au as CE. To the best of our knowledge, this is the highest efficiency that has been reported for carbon-based PSCs. By contrast, the pristine TiO 2 -based device only displayed a PCE of 15.82%. Detailed superior capability of Ni-doped TiO 2 in facilitating charge transfer and suppressing carrier recombination are revealed by Hall effect and photoluminescence (PL) as well as electrochemical impedance spectroscopy (EIS) measurements. Furthermore, the use of highly stable CuPc and commercial carbon makes as-prepared PSCs exhibit excellent stability with no obvious decline in PCE after being stored in ambient air for 1200 h. This work presents an important step forwards to the commercialization of carbon-based PSCs with high efficiency and long-term stability.
研究领域:
材料科学
·
能源技术
✓ 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）