JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xupo Liu,Ran Wang,Mengyun Wei,Xihui Wang,Jiayao Qiu,Jingru Zhang,Shilong Li,Ye Chen
Electrochemical oxidation of biomass-based 5-hydroxymethylfurfural (HMF) is an effective approach for achieving the high-value products of 2,5-furandicarboxylic acid (FDCA). However, the restricted formation of high-valence metal active species for electrocatalysts results in a sluggish kinetic process of HMF oxidation reaction (HMFOR). Herein, we fabricated the Ni 3+ -rich cross-linked α-Ni(OH) 2 nanosheets for accelerating the HMFOR through an anion-mediated strategy. It is identified that the Cl − ions with strong penetrability replace a portion of lattice oxygen atoms in α-Ni(OH) 2 to form Ni-Cl bonds, contributing to breaking the inherent lattice order and generating a special Ni 3+ -rich structure. Owing to the promoted adsorption and accelerated oxidation of hydroxyl and aldehyde groups by the affluent Ni 3+ active species, the large oxidation current density of 116.5 mA cm −2 and HMFOR kinetic constant of 0.067 min −1 has been achieved at 1.45 V (vs. RHE). By analyzing the oxidation products, the FDCA yield and Faradic efficiency are both higher than 99.25 % and 99.36 % for five successive determinations. Therefore, this work provides an insightful anion-mediated strategy for designing high-performance electrocatalysts for biomass conversion application.
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高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 47
·17981-17992
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IF 4
Changzhen Wang,Xueqing Hai,Jia Li,Yupeng Liu,Xiaosheng Yu,Yongxiang Zhao
We studied the Ni–Cu-acid multifunctional synergism in NiCu-phyllosilicate catalysts toward 1,4-butynediol hydrogenation to 1,4-butanediol by varying the reduction temperature, which can activate different bimetal and support interactions. Compared with a monometallic Ni phyllosilicate (phy), which only showed one type of metal species when reduced at ∼750 °C, there are three types of metal species for the bimetallic Ni–Cu-phyllosilicate derived catalysts, namely Cuphy, differentiated Ni, and Niphy. Thorough structure–activity/selectivity correlation investigations showed that, although the Ni9Cu1-P catalyst matrix can produce tiny amounts of differentiated Ni0 species under the induction of reduced Cu0 at R250 condition, it could not form Ni–Cu bimetallic interactions for the collaborative hydrogenation of 1,4-butynediol, and the product stays in the semi hydrogenated state. When the reduction temperature is raised to 500 °C, stable Ni–Cu alloy active sites exist, accompanied by the strong metal support interaction and metal acid effect derived from the intimate contact between the extracted metal sites and the surviving functional phyllosilicate support; these functionalities yield a supreme hydrogenation performance of the R500 sample with a 1,4-butanediol yield larger than 91.2%.
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Materials Today Energy
·
2023
·
IF 9.3
Fangyuan Zhang,Xueli Zhang,Shan Hu,Huilin Hu,Jinhua Ye,Defa Wang
Photothermal catalytic carbon dioxide (CO 2 ) reduction has attracted increasing research attention as a promising method for recycling CO 2 and producing renewable energy. However, it remains a challenge in the improvement of catalytic activity with regulated product selectivity in view of practical applications. Herein, we develop the two-dimensional layered V 2 C MXene (VC) supported Ni nanoparticle and NiO nanosheet (Ni@NiO/VC) composite as an efficient catalyst for selective photothermal reduction of CO 2 to CH 4 . The optimal 0.8Ni@NiO/VC catalyst exhibits 48.1 % CO 2 conversion with an evolution rate of 33.2 mmol/g cat /h and 99.2 % selectivity for CH 4 production under a 300 W full-arc xenon lamp irradiation. Moreover, a long-term cyclic photothermal CO 2 reduction reaction demonstrates the excellent stability of 0.8Ni@NiO/VC. The enhanced photothermal CO 2 reduction activity with a high CH 4 selectivity could be attributed to the large specific surface area and excellent photothermal effect of V 2 C MXene, and the synergistic effect of Ni and NiO on adsorption/activation of H 2 and CO 2 molecules. This work provides a feasible strategy for the construction of efficient photothermal CO 2 reduction catalyst by properly incorporating transition metal nanoparticles and metal oxide with a suitable MXene.
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Microsystems & Nanoengineering
·
2023
·Vol. 9
·期 1
·1-10
·
IF 7.9
Li Guanglei,Chen Yao,Liu Fei,Bi Wenhua,Wang Chenxin,Lu Danfeng,Wen Dan
It is important to monitor the intra-/extracellular concentration of hydrogen peroxide (H 2 O 2 ) in biological processes. However, miniaturized devices that enable portable and accurate H 2 O 2 measurement are still in their infancy because of the difficulty of developing facile sensing strategies and highly integrated sensing devices. In this work, portable H 2 O 2 sensors based on Pt-Ni hydrogels with excellent peroxidase-like and electrocatalytic activities are demonstrated. Thus, simple and sensitive H 2 O 2 sensing is achieved through both colorimetric and electrochemical strategies. The as-fabricated H 2 O 2 sensing chips exhibit favorable performance, with low detection limits (0.030 μM & 0.15 μM), wide linearity ranges (0.10 μM–10.0 mM & 0.50 μM–5.0 mM), outstanding long-term stability (up to 60 days), and excellent selectivity. With the aid of an M5stack development board, portable visual and electrochemical H 2 O 2 sensors are successfully constructed without complicated and expensive equipment or professional operators. When applied to the detection of H 2 O 2 released from HeLa cells, the results obtained by the developed sensors are in good agreement with those from an ultraviolet‒visible spectrophotometer (UV‒vis) (1.97 μM vs. 2.08 μM) and electrochemical station (1.77 μM vs. 1.84 μM).
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Hongli Wang,Hao Yuan,Ke Lu,Zhi Zheng,Yihao Xu,Jianping Liang,Qingnan Xu,Junfeng Gao,Wenchun Wang,Dezheng Yang
The severe adverse impacts of toxic metal ions on ecosystems and human health call for the urgent development of an efficient adsorbent. In this study, a novel micro-mesoporous zeolite material was prepared by nanosecond pulsed discharge-amino co-modification method to selectively adsorb Ni(II) ions. The prepared micro-mesoporous adsorbent exhibited a large specific surface area (1042 m 2 g −1 ) and were rich in -NH 2 and -COOH that can produce surface complexation and electrostatic adsorption with Ni(II) ions. The optimal experimental parameters were obtained at 8 min of discharge time, 16 kV of pulse peak voltage, 1 kHz of pulse repetition frequency, and pH = 7. The Ni(II) ions removal efficiency of nanosecond pulsed discharge-amino co-modified MCM-41 reached 98% within 20 min, an increase of 54% and 26% compared to the raw and solo amino modification, respectively. The adsorption processes of Ni(II) ions were well fitted by pseudo-second-order and Langmuir isotherm models, indicating that the adsorption involves monolayer chemisorption . Despite the presence of other coexisting ions, the prepared zeolites retained their excellent adsorption selectivity for Ni(II) ions. This co-modification method overcomes the drawback of mesopores blockage and further implants micropores in adsorbents, providing a novel idea and broad prospect for adsorbent modification and removal of Ni(II) ions.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Junjie Qiao,Yuyang Han,Lanyang Feng,Yanting Li,Jianning Ding,Fei Xu,Bencai Lin
This paper reports the low-cost fabrication of high-performance double transition metals (Fe, Ni) and N-doped carbon nanotubes (FexNiy-N-CNT) to catalyze the oxygen reduction reaction (ORR) in zinc–air batteries (ZABs). The target active sites and appropriate carbon substrates of the designed catalysts facilitated charge transfer kinetics. The carbon nanotube (CNT)-based catalysts underwent electrochemical testing using the rotating ring–disk electrode method, and the results revealed that the Fe2Ni1-N-CNT catalyst exhibited both an exceptional ORR performance (E1/2 = 0.86 V) and excellent stability. Furthermore, the ZABs with the Fe2Ni1-N-CNT catalyst exhibited a high power density (169.5 mW cm–2) and an open-circuit voltage (1.46 V). These findings can provide insights into the development of efficient and sustainable CNT-based cathode catalysts for ZABs.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Meiling Chen,Lei Zhou,Xiuqin Xiong,Shijun Zhu,Xinkai Yuan,Boyin Yan,Bingrui Ma,Jiachuang Shao,Liming Yang,Xubiao Luo,Penghui Shao
Conventional advanced oxidation processes were used to treat heavy metal complexes. However, a considerable amount of oxidants was required to enable effective oxidative degradation, which led to a significant increase of the treatment costs and subsequent difficulties in the sludge disposal. Based on the abundance of anions in heavy metal wastewater, the effects of anions on the in-situ degradation of Ni-EDTA in an oxidant-free electrochemical system with boron-doped diamond (BDD) as the anode were investigated. The presence of Cl - was found to exert a significant effect on improving the degradation process. Moreover, pH had little effect on the removal of nickel (Ni) and Ni-EDTA within a specific pH range (1 < pH < 9). The removal efficiencies of Ni and TOC reached 100 % and 77.45 %, respectively, at pH 2.16 with 0.4 M NaCl electrolyte, 2 mM Ni-EDTA concentration, and a current density of 50 mA/cm 2 . •OH and Cl• played crucial roles in the removal of Ni-EDTA by disrupting the chelation sites of Ni and EDTA molecules. The released Ni 2+ ions could active the H 2 O 2 in-situ generated at the cathode to produce •OH. The formation of the precipitation products such as NiOOH, Ni(OH) 2 , and NiCO 3 in the Cl - /BDD system were conform based on the XRD and XPS analyses, which suggested the possible pathways for the removal of Ni 2+ and Ni 3+ . Finally, the possible degradation pathways of Ni-EDTA were proposed based on the identification of intermediate products using UPLC-MS.
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Advanced Materials Interfaces
·
2023
·
IF 5.4
Wen Hu,Yaxin Zhang,Yue Zhao,Rusen Yang
Ni-rich layered oxides are considered as promising cathodes for next-generation lithium-ion batteries. However, they still suffer microstructure and surface instability particularly under high operating voltage, leading to rapid capacity fading and battery failure. In this context, Ni-rich layered cathodes (LiNi x Co y Mn 1− x − y O 2 ; LNCM) with aluminum and indium co-modified crystal and surface structures are developed by a simple one-pot calcination approach. Battery tests show that the Al and In co-modified LNCM electrodes demonstrate remarkably enhanced rate capability and cycling stability compared with the pristine LNCM, Al-doped LNCM, and In-modified LNCM counterparts. Further characterizations reveal a simultaneous suppression of cracking and resistive film growth. The improved microstructural and surface stability originate from the synergistic functions of Al and In co-modification. The incorporation of Al 3+ into transition metal slab significantly reduces the Li + /Ni 2+ antisite, which noticeably mitigates the undesired layer to rock-salt phase transformation. The In 3+ dopant dispersed in Li interslab can dissipate the anisotropic lattice strain, enabling greatly improved reversibility of H2↔H3 phase transition occurred in delithiation-lithiation processes. Meanwhile, the synchronously formed LiInO 2 adherent coatings deplete lithium residues, facilitate lithium-ion transfer, and resist electrolyte corrosion. Microstructure and surface engineering through Al and In co-modification offer a promising design strategy for Ni-rich layered cathodes.
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GREEN CHEMISTRY
·
2023
·Vol. 25
·期 21
·8645-8651
·
IF 9.8
Jianyue Yan,Jiawen Li,Peng Liu,Hao Huang,Wenbo Song
Electrocatalytic reduction of nitrate represents a carbon-neutral approach to managing wastewater remediation while offering an innovative route for high-value green ammonia synthesis. However, nitrite byproduct is inevitably generated in the electrochemical process, which is more toxic to human beings and limits the conversion efficiency of nitrate to ammonia. Herein, a bimetallic metal–organic framework NixCu(3−x)(HITP)2 (HITP = 2,3,6,7,10,11-hexaiminotriphenylene) is proposed as both a cascade catalyst to eliminate the nitrite and a mechanism platform for the study of the cascade process for nitrate reduction. The bimetallic NixCu(3−x)(HITP)2 platform shows that the Cu sites work as the active sites responsible for the conversion of nitrate to nitrite (NO3− + 2 e− → NO2−). The byproduct NO2− has a tendency to adsorb at Ni sites and further convert to NH3 (NO2− + 6 e− → NH3). By integrating Cu and Ni active centers, the bimetallic MOF strategy synergizes the distinct reaction pathways on heterogeneous metal centers. As a result, compared with monometallic Cu3(HITP)2, the optimal Ni1.5Cu1.5(HITP)2 achieved an outstanding NH3 yield of 130.93 μmol h−1 cm−2 with dramatically enhanced NH3 selectivity. This research elucidates the correlation between structure and activity in bimetallic active sites and cascade catalysis, which offers a high-efficiency nitrate-to-ammonia reduction.
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JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2023
·Vol. 32
·期 8
·2460-2477
·
IF 3.1
Wu Duoli,Wu Haotian,Yuan Ziyi,Wei Xinlong,Zhang Chao
To investigate the influence of Mo addition and water vapor content on the high-temperature corrosion resistance of Ni-Al-based coatings, 0Mo, 5Mo, and 10Mo coatings were deposited by APS thermal spray onto stainless steels. The chlorine-induced corrosion test was conducted in an experimental environment simulating a biomass boiler. The results show that adding the Mo element lowers the coating's ability to resist corrosion without water vapor. The coating is more prone to peeling because Mo prevents the coating from eventually forming a protective oxide layer. Water vapor significantly speeds up the production of oxides and modifies their morphology and structure. The combined effects of Mo and water vapor increase the coating's ability to resist corrosion. The development of thick and protective Ni and Al oxide layers on the coated surface is aided by the acceleration of oxide production by water vapor and the alteration of oxide structure by Mo components.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yong He,Xiao Kang,Hui-wen Xiong,Lei Zhang
Spinel composite is being considered for electrode materials in molten salt electrolysis, aiming to improve high-temperature stability and conductivity. Multi-phase composites with the general formula of (Fe 1-3 x - y Ni y Co x Cr x Mn x ) 3 O 4 ( x = 0.03, 0.06, 0.09, y = [1-2 x ]/3) were prepared via in situ SPS method. The composites were confirmed to consist of spinel and rock-salt phases through XRD and SEM analysis. Compared to the Ni–Fe–O system, the doping of Cr, Mn and Co improved the phase stability of the spinel during SPS, but hindered the shrinkage process. These composite exhibited low thermal diffusivity (1.236–2.481 m 2 /s, room temperature) and low coefficient of thermal expansion (9.8 - 14.4 × 10 −6 K −1 , 400–800 °C). Moreover, the composite with x = 0.06 and y = 0.29 exhibit 94.4 % lower permittivity, 7 times higher dielectric loss (at 40 Hz) and 26.6 % lower high-temperature conductivity (at 800 °C) than that of Ni–Fe–O system. This work demonstrates the enhanced thermal and electrical properties of spinel-based composites, which can provide inspiration to researchers and promote the development of high-temperature electrodes.
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高影响因子
CORROSION SCIENCE
·
2023
·
IF 8.3
Shupei Liu,Xinfang Zhang,Jinsong Rao,Liang Yu,Wei Lu,Huan Zhou,Shibo Chen,Yuxin Zhang,Xiaoying Liu
Ni-Co Layered Double Hydroxide (LDH) shows great application potential in the field of anti-corrosion. However, the poor carrying capacity limits the performance of anticorrosion performance. In this study, Ni-Co hydrotalcite was grown on the surface of DE, and Ni-Co/DE@SP microcapsule with corrosion inhibitor loading up to 14.7% was successfully prepared. The adsorption capacity of Ni-Co/DE@SP for Cl − in 600 mmol/L NaCl solution was 6.72 mmol/g. It is worth noting that the impedance modulus of the prepared composite coating (EP/Ni-Co/DE@SP) is two orders of magnitude higher than that of the pure resin coating, and the wear resistance was improved by 33%.
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