International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yuxi Yang
In this work, Ni-Zn-doped porous carbon materials (Ni@C) with regular dodecahedral morphologies were synthesized by calcination of Ni-doped ZIF-8 as a template, and applied in electrochemical sensing and quantitative electrochemical sensors to detect Hydroquinone (HQ), The uniformly dispersed Ni in Ni@C serves as the catalytically active material, and the synergistic effect of elemental Zn and porous carbon improves the electron transport efficiency of the material. The developed Ni@C electrochemical sensor detected HQ alone with a sensitivity of 180 μA μM -1 cm -2 and a linear range of 9.1 nM-80 μM. The results demonstrate that the enzyme-free electrochemical sensor based on Ni@C/GCE exhibits good sensitivity, a wide linear range and excellent selectivity. At the same time, the problem of the general conductivity of metal-organic framework (MOF) materials is solved, which provides a new idea for the application of such new materials in the direction of electrochemistry.
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Asia-Pacific Journal of Chemical Engineering
·
2022
·Vol. 17
·期 2
·e2739
·
IF 1.777
Yuan Wang,Shanshan Liu,Qirui Guo,Yidong Zhang
Conversion of biomass-derived furfural platform compound to value-added tetrahydrofurfuryl alcohol (THFL) molecule is a sustainable route, and an efficient nonnoble metallic catalyst is a key factor for this reaction. In this work, Ni@C@CNT composite as a highly effective catalyst for hydrogenation of furfural to tetrahydrofurfuryl alcohol was synthesized by one-step pyrolysis of Ni-centered metal organic framework (Ni-MOF) doping with carbon nanotube (CNT). For comparison, Ni@C catalyst derived directly from Ni-MOF was also synthesized. The characterization results show that the doping of CNT promotes high dispersion of active sites and formation of Ni 3 C phase which has Pt-like catalytic activity. Therefore, the obtained Ni@C@CNT exhibited excellent activity in furfural hydrogenation (99.1% furfural conversion and 94.7% THFL yield at 120°C, 4 h, 4-MPa initial hydrogen pressure). Ni@C@CNT also shows good stability in reuse test. Current work presents a facile method for preparation of nonnoble metallic catalysts with high efficiency.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Baiyan Zhang,Chaoqiu Chen,Jian Liu,Wei Qiao,Jixiao Zhao,Jie Yang,Yu Yu,Shuai Chen,Yong Qin
Heteroatom doping and loading of co-catalysts are two efficient tactics to boost the photocatalytic activity of semiconductors. Combining these two strategies in one photocatalyst system has great potential to further enhance the catalytic performance. Herein, a facile and controllable atomic layer deposition (ALD)-reduction approach is used to simultaneously introduce Ni doping and Ni nanoparticles (NPs) with tunable size on CdS nanorods for boosting its photocatalytic activity. The Ni doping and Ni NPs synergistically enhance the H 2 production of CdS nanorods (NRs), achieving an optimized rate of 20.6 mmol·g −1 ·h −1 ~1.3- and 28.6-fold higher than CdS NRs supported Ni NPs with similar size and pristine CdS NRs , respectively. The Ni NPs/Ni doped CdS NRs exhibits an apparent quantum efficiency (AQE) of 37.5% at 420 nm, outperforming most previously reported Ni doped and Ni NPs decorated CdS catalysts. The outstanding photocatalytic activity of the Ni NPs/Ni doped CdS NRs can be ascribed to synergism of the Ni doping and uniformly dispersed Ni co-catalyst with appropriate size, which promote carrier separation of semiconductor and surface hydrogen evolution kinetics on nanocatalyst surface. This work provides a promising pathway to integrate heteroatom doping and loading of co-catalysts strategies in one photocatalyst system for synergistically promoting photocatalytic performance.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 23
·7208-7218
·
IF 6.177
Wenjing Song,Yujie Wan,Yuefeng Li,Xin Luo,Weiping Fang,Quanxing Zheng,Pengfei Ma,Jianping Zhang,Weikun Lai
Low cost and high efficiency catalysts for the reductive amination of carbonyl compounds are critical to the utilization of renewable biomass. In this paper, a highly efficient N-doped porous carbon supported Ni catalyst was prepared by a template-assisted pyrolysis and impregnation method. In the presence of NH3 and H2, the as-prepared catalyst could effectively catalyze the reductive amination of various carbonyl compounds into corresponding primary amines with high yield and excellent stability. Comprehensive characterization demonstrated that the reductive amination of furfural towards furfuryl amine was linked to the formation of Ni–Nx sites and the electronic interaction of N and Ni species on the N-doped carbon surface, which promoted the reductive amination of CO bonds and significantly reduced the activation energy in reductive ammonolysis of trimers and Schiff base intermediates. This work provided a new insight into rational design of reductive amination catalysts for primary amine production.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Yuan Fang,Jundi Liu,Chengxi Zhang,Kande Liu,Ziying Ju,Xuan Meng,Naiwang Liu,Li Shi
This work systematically investigates the effect of Ni/Ce molar ratios (0.3–2.9) on the structure–activity relationship of Ni/Ce mixed oxides for low-temperature CO2 methanation. As the Ni/Ce ratio increased, the rate of CO2 conversion gradually increased. At a GHSV of 12,000 mL·g–1h–1, all catalysts exhibited 100% CH4 selectivity. The best-performing NiCe-2.1 catalyst not only achieved 37.2% CO2 conversion at 200 °C but also maintained above 85% CO2 conversion during the stability test at 250 °C. Characterization (XRD, BET, TEM, H2-TPR/TPD, CO2-TPD, XPS) results revealed that when Ni/Ce <2.1, the catalyst exhibited a conventional Ni/CeO2 structure. The specific surface area gradually decreased with an increasing Ni content. The activity enhancement of Ni/CeO2 structure primarily resulted from the absolute increase in the number of Ni–O–Ce interface sites. When Ni/Ce = 2.1, the catalyst formed an inverse CeO2/Ni structure, which re-exposed the CeO2 surface and significantly restored the specific surface area. TOF analysis confirmed that the interfacial sites in the inverse structure had higher intrinsic activity, thereby further improving the low-temperature activity. When Ni/Ce >2.1, excessive independent NiO phases caused severe nickel agglomeration, inhibiting the formation of additional Ni–O–Ce interfaces. Finally, in situ DRIFTS results revealed that the CO2 methanation on NiCe-2.1 mainly followed the formate pathway (CO2* → HCO3* → HCOO* → CH4).
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CARBON
·
2026
·
IF 12.7
Huimin Xie,Wenhui Liu,Linkun Wu,Liping Zhang,Yuxiang Wang,Zaizhe Cheng,Xiucheng Sun,Shuhao Wei,Guojun Lan,Ying Li
Ni-phyllosilicate hard-templating yields sintering-resistant mesoporous Ni–C catalysts. • Achieves high-loading, ultrafine Ni NPs via a confined interfacial layer. • Enhanced SMSI and anti-leaching stability are confirmed by multi-technique analysis. • Superior LA-to-GVL hydrogenation: 99.7% conversion, 99.3% selectivity. • A general design for high-performance non-noble metal-carbon hydrogenation catalysts. Carbon-encapsulated metal catalysts prepared by in-situ carbonization generally suffer from severe metal sintering during high-temperature treatment. Herein, we develop a nickel phyllosilicate-assisted hard-templating strategy to construct mesoporous Ni–C catalysts with ultrafine, high-loading Ni nanoparticles partially embedded in the carbon support. A Ni 3 Si 2 O 5 (OH) 4 interfacial layer is pre-formed via ammonia evaporation prior to carbonization, which effectively inhibits Ni sintering and strengthens the metal-support interaction. The embedded structure generates charge-polarized Ni δ+ –Ni δ– sites that promote hydrogen dissociation and spillover, and enable synergistic activation of levulinic acid and H 2 . Under mild conditions (S/C = 50, 160 °C, 1 MPa H 2 ), the optimized Ni–C–p catalyst achieves 99.7% LA conversion and 99.3% γ-valerolactone selectivity within 2 h, with a reaction rate approximately three times that of conventional impregnated Ni/C. This strategy exhibits good universality for designing other non-noble metal-carbon composites toward challenging liquid-phase hydrogenation reactions. Download: Download high-res image (290KB) Download: Download full-size image
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ACS Nano
·
2026
·Vol. 20
·期 30
·20998-21012
·
IF 17.3
Zhan Feiyang,Bian Zongkun,Chen Qingqing,Wu Xi,Zou Qingxin,Yun Ruirui,Zhang Haimin,Zhang Yunxia,Zhao Huijun
The rapid iteration and imminent retiring tide of lithium-ion
batteries
(LIBs) call for the sustainable upcycling of degraded low-Ni cathodes
into ultrahigh-Ni cathodes, meanwhile addressing their inherent interfacial
and bulk structural instability to meet the ever-increasing pursuit
for next-generation LIBs. Herein, an upcycling strategy based on surface-to-bulk
engineering is demonstrated to upgrade spent low-Ni cathodes (LiNi 0.33 Co 0.33 Mn 0.33 O 2 , NCM111)
into single-crystalline ultrahigh-Ni cathodes (LiNi 0.9 Co 0.05 Mn 0.05 O 2 , NCM90) featuring Hf/B homogeneous
bulk doping and Li 2 HfO 3 coating (denoted as
U-NCM90HB). Notably, B doping enables to reinforce the stability of
the oxygen framework, while Hf doping with its larger ionic radius
triggers the “pinning effect” within the layered structure
and inhibits planar gliding and cracks. Further, the in situ formed Li 2 HfO 3 coating reduces residual lithium
compounds on the surface, facilitates the rapid diffusion of Li + , and alleviates side reactions at the cathode interface.
As expected, the upcycled cathode exhibits significantly improved
performance as compared to commercial counterparts, sustaining stable
cycling with 89.3% retention after 100 cycles at 0.5 C and delivering
a high capacity of 174 mAh g –1 at 5 C. The upcycling
method presented here can inspire a broad set of engineering potentials
for the sustainable and value-added upcycling of spent ternary layered
oxide cathodes.
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Xincheng Jiang,Yanyan An,Yaoyao Huang,Wei Ding,Manli Sun,Hong Li,Huaili Zheng
The residual antibiotics in the environment will pose a threat to the environment and human health. Thus, it is imperative to develop a smart water treatment material to remove and detect antibiotics from aqueous environment simultaneously. In this study, magnetic Cu–Ni–S@Ni foam was synthesized by liquid phase vulcanization method to in-situ load Cu–Ni–S nanostructures on the surface of Ni foam. The novelty of this material is the combination of adsorption-flocculation technology and semi-quantitative detection technology. Batch experiments showed that Cu–Ni–S@Ni foam has a high removal rate of norfloxacin (NOR) (96.92%), wide pH adaptability (pH = 4.0–10.0) and strong ion interference resistance (0.1–100 mmol/L). According to the Langmuir isotherm , the removal capacity can reach 417.4 mg/g at 25 °C, which is much higher than that of other water treatment agents reported in most studies. Characterization analysis indicated that the main removal mechanisms are surface complexation, cation bridging, electrostatic attraction , precipitation and flocculation . Transmission FTIR detection experiments showed that NOR on Cu–Ni–S@Ni foam has easily recognizable FTIR fingerprints; the intensity of characteristic peaks roughly reflects the concentration information of NOR to some extent. This semi-quantitative detection method, requiring simple operation without the fabrication of KBr tablet, has a wide linear range (5–100 mg/L) and a low limit of detection (4.6 mg/L). Therefore, Cu–Ni–S@Ni foam can be used for simultaneous removal and semi-quantitative detection of NOR in wastewater. It has potential application value in wastewater treatment and water quality monitoring.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 4
·928-935
·
IF 4
Yidan Sun,Fang Liu,Xuerong Wang,Kangkang Lu,Xiaojing Liu,Yan Huang,Fengjiao Yu,Yuhui Chen
Efficient catalysts are highly desirable for the selective electrochemical CO2 reduction reaction (CO2RR). Ni single-atom catalysts are known as promising CO2RR catalysts, while Ni NPs are expected to catalyze the competing HER. In this work, we have modified the Ni NPs by encapsulating them into porous Ni–N–C nanosheets (Ni@Ni–N–C), to boost the synergy between Ni NPs and dispersed Ni–N species towards CO2RR. The CO faradaic efficiency (FECO) reached 96.4% at −0.9 V and retained over 90% in a wide potential window. More importantly, FECO values of over 94% have been obtained from −50 to −170 mA cm−2 with a peak FECO of 99% in a flow cell. Our work demonstrates that the surface modification of Ni NPs can inhibit the unexpected HER and activate the surface sites, offering a practical design strategy for CO2RR catalysts.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jie Liu,Chunmiao Liu,Yanchun Tong,Chang Liu,Haibin Sun,Qiangqiang Hu,Shigang Wu,Yujun Zhao,Xue Guo,Yurun Feng
In recent years, electromagnetic wave (EMW) absorbing materials derived from biomass materials have been widely concerned because of their light weight and high efficiency. Here, Ni/PDCs/biomass ceramic composites absorbing material was prepared by a simple suspension impregnation-in-situ reduction carbonization process and polymer-derived ceramics (PDCs) with peanut shell as the absorbing matrix and NiO doped in polysiloxane as the precursor solution. The synergistic effect of Ni/PDCs could effectively adjust the impedance matching of the composite, and the BET results shown that the prepared Ni/PDCs/biomass ceramic composites had a hierarchical porous structure, which could not only provide a large number of heterogeneous interfaces, but also enhance the interface polarization, dipole polarization and multiple reflection loss of the absorbing material. The sample of NPP-1 possessed good EMW absorbing performance when the content of NiO was 1 % and the filler was 50 %, the minimum reflection loss (RL min ) reached − 66.38 dB at 1.74 mm, and the effective absorption bandwidth (EAB) was 3.54 GHz (14.46–18 GHz) at 1.45 mm. In this work, the electromagnetic parameters of biomass materials were adjusted by polymer conversion ceramics and metal oxides , which provided another feasible scheme for enhancing the absorbing properties of biomass materials.
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CARBON
·
2023
·
IF 10.9
Hao Wang,Jiangwen Liao,Jiajun Zhong,Yunpeng Liu,Lei Yao,Lixiong Qian,Yuecheng Lai,Xin Wang,Yikun Li,Jianxin Song,Xueqing Xing,Guang Mo,Zhongjun Chen,Zhonghua Wu
In this paper, the unclear Ni atom coordination structure evolution in one-pot pyrolysis method synthesizing Ni single atom catalyst using graphitic carbon nitride as support (Ni-g-C 3 N 4 ) was deeply discussed. In-situ X-ray absorption fine structure spectra and other assisted methods were used to characterize the structural evolution. The results demonstrate that the pyrolysis process can be divided into three stages. In the first stage from room temperature to 183 °C (Stage I), the NiCl 2 ⋅6H 2 O was mixed with the supporting material (dicyandiamide) to form the precursor with Ni-(H 2 O) 6 octahedral coordination configuration. In the second stage from 183 to 350 °C (Stage II), the H 2 O molecules have been removed and the supporting material was converted to melamine. The melamine molecules were polycondensed to melem during 308–350 °C. The intermediates labeled Ni-melamine and Ni-melem was formed with Ni-N 4 planar quadrilateral coordination configuration. In the third stage from 350 to 600 °C (Stage III ), the supporting material (melem) was gradually converted to g-C 3 N 4 , and the Ni-N 4 coordination configurations were replaced by Ni-N 6 planar hexagon coordination configuration one by one. The three Ni coordination configurations were further confirmed by Reverse Monte Carlo simulations and ab initio calculations .
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yang Zong,Wenjie Ji,Yu Xie,Deli Wu
The mineralization of organic pollutant by O 3 is prone to be restricted by the accumulative production of oxalate (OA) that is recalcitrant to the attack of hydroxyl radical ( OH). Herein, it was interestingly found that the presence of 0.5 mM Ni(II) enhanced the mineralization efficiency of EDTA by O 3 under alkaline conditions by 22.8%, with the promoting effect of Ni(II) augmented as the increasing loading of Ni(II). Based on the results from scavenging experiment, chemical probe detection and XPS characterization, it was verified that except for the commonly recognized reactive oxidants (i.e., OH and O 3 ) in EDTA mineralization, the overlooked Ni(III) species (i.e., NiOOH) also played an indispensable role in enhancing the mineralization of EDTA. The Ni(III) species was formed via the oxidation of decomplexed Ni(II) by OH and in turn collaborated with OH to decompose EDTA. More importantly, the generated Ni(III) species exerted higher affinity towards OH and O 3 -resistent oxalate, hence elevating EDTA mineralization. This study elucidated the significant role of Ni(III) species in promoting the mineralization efficiency of EDTA, and also proposed a new insight into elevating the treatment performance of ozonation via the collaborative oxidation mechanism-co-mediated by OH and Ni(III) species.
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