SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Zhijie Guan,Yanping Guo,Shoupeng Li,Shaoqing Feng,Yanghong Deng,Xuelian Ou,Jie Ren,Shuiyu Sun,Jialin Liang
Following the conventional physicochemical treatment of electroless nickel (Ni) plating wastewater (ENPW) in electroplating wastewater treatment plants , highly stable and recalcitrant coordination complexes of Ni (CCN) still remain. This results in various technical problems, leading to the treatment difficulty, poor wastewater biochemistry, and failure to meet effluent standards. Therefore, an efficient decomplexation system involving heterogeneous catalytic ozonation assisted with heavy metal chelation (O 3 /SAO3II-MDCR) was proposed in this study for the advanced treatment of CCN. The catalyst SAO3II was characterized by various methods, which revealed the mechanism of catalytic ozonation . Hydroxyl radicals ( OH) and other reactive oxygen species (ROS) groups were detected, proving that catalytic ozonation was a complicated reaction process and also a foundation process of the entire system. These ROS are vital for decomplexation via heterogeneous catalytic ozonation of the system. During the catalytic decomplexation process via ozonation, CCN first underwent gradual decomposition from a highly stable macromolecular state to a volatile micromolecular state (or even completely mineralized state). Then Ni was chelated to form an insoluble and stable chelate via competitive coordination. The optimum conditions for the O 3 /SAO3II-MDCR system were determined by single factor static experiments. After treatment with the O 3 /SAO3II-MDCR system, the effluent concentration of total Ni was found to be <0.1 mg L −1 , exhibiting a removal rate of up to 95.6% and achieving effective removal of total Ni from ENPW and stably meeting the discharge standard. O 3 /SAO3II-MDCR system can easily and hopefully be extended to practical engineering applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Yapeng He,Panpan Zhang,Hui Huang,Xiaobo Li,Xinhua Zhai,Buming Chen,Zhongcheng Guo
The development of an efficient metal sulfide cathode is of great importance and an ongoing challenge for the practical application of an aqueous rechargeable Ni-Zn battery. Herein, Ni3S2 nanosheets with abundant sulfur vacancies (r-Ni3S2) have been successfully prepared via hydrothermal reaction and surface engineering, which are further employed as the binder-free cathode of the aqueous Ni-Zn battery. Benefitting from the features of substantially improved electrical conductivity, low band gap, abundant active sites, and good intrinsic capacity, the r-Ni3S2 electrode delivers an impressive reversible specific capacitance (1621.6 F g–1 at 0.2 A g–1) and extraordinary rate capability (62.1% retention under 8 A g–1). Moreover, the aqueous rechargeable r-Ni3S2//Zn battery exhibits a remarkable specific capacity (240.8 mAh g–1 at 1 A g–1) and preeminent cycling durability (only 8.4% decay after 3000 cycles). Besides, a glorious energy density of 419.6 Wh kg–1 together with a peak power density of 1.84 kW kg–1 could be achieved, surpassing a significant percentage of the reported Ni-Zn batteries. The results reveal that the r-Ni3S2 cathode with abundant sulfur vacancies and the adopted facile approach possesses huge promotion potential for Ni-Zn batteries and is promising to numerous electronics and electric vehicle applications in the future.
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2020
·Vol. 10
·期 4
·401
·
IF 3.52
Mengzhao Jiao,Jie He,Shanshan Sun,Frank Vriesekoop,Qipeng Yuan,Yanhui Liu,Hao Liang
Carbonic anhydrase (CA) has received considerable attention for its ability to capture carbon dioxide efficiently. This study reports a simple strategy for immobilizing recombinant carbonic anhydrase II from human (hCA II) on Ni-based MOFs (Ni-BTC) nanorods, which was readily achieved in a one-pot immobilization of His-tagged hCA II (His-hCA II). Consequently, His-hCA II from cell lysate could obtain an activity recovery of 99% under optimal conditions. After storing for 10 days, the immobilized His-hCA II maintained 40% activity while the free enzyme lost 91% activity. Furthermore, during the hydrolysis of p-nitrophenyl acetic acid, immobilized His-hCA II exhibited excellent reusability and still retained more than 65% of the original activity after eight cycles. In addition, we also found that Ni-BTC had no fixation effect on proteins without histidine-tag. These results show that the Ni-BTC MOFs have a great potential with high efficiency for and specific binding of immobilized enzymes.Keywords:one-pot hydrothermal;immobilizing recombinant;His-hCA II;Ni-BTC nanorods
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Jiuli Chang,Liming Chen,Shiqi Zang,Yifan Wang,Dapeng Wu,Fang Xu,Kai Jiang,Zhiyong Gao
A facile and efficient oxygen evolution reaction (OER) catalytic system was constructed based on interconnected Ni(OH) 2 nanosheets arrays electrode and Fe(III) containing alkali electrolyte. The partial deposition of Fe(III) onto Ni(OH) 2 with heterostructure obviously enhanced the OER current density and reduced the overpotential, and the Fe(III) cations in electrolyte also furnished positive contribution to the catalytic reaction, the synergy between Ni(OH) 2 electrode and Fe(III) cations in electrolyte therefore substantially improved the OER catalytic efficiency with low overpotential (285 mV at current density of 50 mA cm −2 ) and obviously enhanced current density (391 mA cm −2 at 1.8 V). The current work expands our understanding on the effect of Fe(III) cations in electrolyte to OER efficiency of Ni based catalyst, and opens up a cost-effective and practical avenue to enhance the OER catalytic efficiency by introducing metal cations in alkali electrolyte.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 29
·10203-10211
·
IF 4.174
Shaobin Li,Jing Pan,Fengbo Li,Li Zhang,Dongfeng Chai,Zhuanfang Zhang,Jianjiao Xin
A simple continuous hydrothermal method was used to synthesize a NiFe2O4@Ni–Mn LDH/NF composite. The layered structure provides a large void to transfer the electron effectively, and the composite materials exhibit remarkable electrochemical performance including excellent specific capacitance (1265 F g−1 at 1 A g−1) and remarkable cycling stability (the specific capacitance remains at 80.9% after 5000 cycles). In addition, the asymmetric supercapacitor exhibits a high energy density of 96.2 W h kg−1 at a power density of 700 W kg−1, and there is an extraordinarily good cycling stability with a capacity retention rate of 92.5% after 4000 cycles. The outcomes indicate that the NiFe2O4@Ni–Mn LDH/NF composite electrode has potential application as a high-performance supercapacitor.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Xingqiang Wu,Husileng Lee,Hongzhen Liu,Liangjie Lu,Xiujuan Wu,Licheng Sun
Electrochemical water splitting for hydrogen production is a promising solution for the production of renewable and environmentally friendly energy sources, but it is hindered by the sluggish kinetic process of oxygen evolution reaction (OER). Here, a novel hierarchical core-shell nanoarray NiCo/Ni/CuO/CF was synthesized by assembling Ni–Co hydroxide nanosheets directly on the metallic nickel coated CuO nanowires , as a highly efficient electrocatalyst for alkaline OER. This NiCo/Ni/CuO/CF anode exhibited low overpotentials of 246 mV and 286 mV at current densities of 10 mA cm −2 and 100 mA cm −2 , respectively, and a small Tafel slope of 37.9 mV dec −1 . Moreover, NiCo/Ni/CuO/CF showed robust durability at least 60 h at a current density of 100 mA cm −2 . Detailed investigations verified that the unique nanosheets/nanowires architecture with high conductivity metallic nickel layer can expand the exposure of active sites and accelerate the transport of electrons.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Ze Zhang,Jun Cheng,Yanxia Zhu,Hao Guo,Weijuan Yang
To promote hydrocracking and isomerization activities of bifunctional catalyst for the conversion of methyl palmitate into jet biofuel, phosphotungstic acid (HPW) loaded on Ni/MCM-41 catalyst enhanced strong acidity to strengthen conversion pathways of hydrocracking and isomerization. In the bifunctional catalytic system, Ni catalyzed hydrodeoxygenation and dehydrogenation of methyl palmitate to produce 1-pentadecene, while acid sites catalyzed further conversion of 1-pentadecene to produce jet fuel range hydrocarbons. Quantum chemistry calculation showed that activation energy in chemisorption process of 1-pentadecene onto acid sites significantly reduced from 203.9 kJ/mol with MCM-41 to 81.6 kJ/mol with HPW. Since bond order of β-scission site in 1-pentadecene over HPW was 0.93% lower than that over MCM-41, and Hirshfeld atomic charge of carbenium ion in 1-pentadecene over HPW (0.0722) was much higher than that over MCM-41 (0.0473), HPW showed better catalytic activities than MCM-41 in both hydrocracking and isomerization processes. The overall selectivity of jet biofuel increased to 86.1% with 47.1% n-alkane selectivity and 8.3% iso-alkane selectivity, due to improved strong acid density from 0.563 to 0.730 mmol/g over 20% HPW-Ni/MCM-41 catalyst.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 44
·期 6
·4827-4836
·
IF 3.741
Mojie Sun,Zhao Wang,Bixue Gao,Shijie Wang,Chi Wang,Xiaochen Song,Dongyao Lin
Summary To circumvent the expensive cost of precious metal electrocatalysts, a hydrothermal method and a plasma-enhanced chemical vapor deposition (PECVD) method have been used to prepareNiS 2 -Ni(OH) 2 /NF-PECVD (N-PECVD) with excellent properties. After XRD, SEM, XPS, and other characterization methods, it can be seen that after the hydrothermal reaction of Ni foam (NF), 50-60 nm Ni(OH) 2 nanosheets have grown on the NF frame. The subsequent PECVD reaction produces 90 nm NiS 2 -Ni(OH) 2 nanosheets on the NF frame. The hydrogen release overpotentials in the acidic solution and alkaline solution are 90 and 95 mV ( j = 10 mA/cm 2 ), respectively. And the Tafel slopes reach 80 and 83.6 mV/dec, respectively. The chronopotential (CP) test shows that the material has good HER stability over 12 h. The results from the subsequent electric double layer capacitance and alternating current impedance (EIS) tests show that N-PECVD synthesized by PECVD has a relatively large active electrochemical surface area (ECSA) and a low electrochemical impedance. This study not only finds good inspiration for the synthesis of cheap HER catalysts but also provides a valuable reference for the synthesis of materials in other fields.
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 22
·期 5
·1662-1670
·
IF 9.48
Wenjing Song,Yanyan He,Sitong Lai,Weikun Lai,Xiaodong Yi,Weimin Yang,Xingmao Jiang
It is a challenge to promote aqueous-phase precise conversion of renewable lignin to valuable chemical building blocks via engineering transition metal catalysts. Motivated by the water effect in promoting catalytic activity, a Ni/Nb2O5 catalyst assembled from plenty of Nb2O5 nanoplates enabled efficient selective hydrodeoxygenation of lignin-derived phenols to alcohols in the aqueous phase. Taking advantage of hierarchical plate features, the interactions between Ni and Nb2O5 plates were enhanced, with the generation of additional interfacial Ni–NbOx sites. The presence of water significantly enhanced the selective hydrodeoxygenation performance by promoting hydrogenation and hydrolysis, and retarding the dehydration process. Through this strategy, the overall yields of alcohols for lignin oil upgrading reached 73.5 wt% in water at 220 °C.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 36
·2102002
·
IF 13.281
Hong Li,Xinxin Shu,Peiran Tong,Jihui Zhang,Pengfei An,Zhengxing Lv,He Tian,Jintao Zhang,Haibing Xia
In this work, Fe–Ni alloy nanoclusters (Fe–Ni ANCs) anchored on N, S co-doped carbon aerogel (Fe–Ni ANC@NSCA catalysts) are successfully prepared by the optimal pyrolysis of polyaniline (PANI) aerogels derived from the freeze-drying of PANI hydrogel obtained by the polymerization of aniline monomers in the co-presence of tannic acid (TA), Fe 3+ , and Ni 2+ ions. In addition, the optimal molar ratio of the TA, Fe 3+ , and Ni 2+ ions for synthesis of Fe–Ni ANC@NSCA catalysts are 1:2:5, which can guarantee the formation of carbon aerogel composed of quasi-2D porous carbon sheets and the formation of high-density Fe–Ni ANCs with an ultrasmall size between 2 to 2.8 nm. These Fe–Ni ANCs consisting of N 4 –Fe–O–Ni–N 4 moiety are proposed as a new type of active species for the first time, to the best of the authors’ knowledge. Thanks to their unique features, the Fe–Ni ANC@NSCA catalysts show excellent performance in oxygen reduction reaction with a half-wave potential ( E 1/2 ) of 0.891 V and oxygen evolution reaction (260 mV @ 10 mA cm −2 ) in alkaline media as bifunctional catalysts, which are better than the state-of-the-art commercial Pt/C catalysts and RuO 2 catalysts. Moreover, Zn–air battery assembled with the Fe–Ni ANC@NSCA catalysts also shows a remarkable performance and exceptionally high stability over 500 h at 5 mA cm −2 .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Xingchen Gao,Kaixin Lu,Jianjun Chen,Jie Min,Deliang Zhu,Manlin Tan
The design and manufacture of effective non-noble metal catalysts for the H 2 evolution reaction (HER) are urgent for realizing a cost-effective hydrogen production . We report herein on flower-like structures consisting of NiCoP–CoP heterostructural nanowires grown directly on the hierarchically porous nickel framework (NiCoP–CoP/Ni/NF) to achieve a highly efficient HER in alkaline solution (1.0 M KOH). The NiCoP–CoP/Ni/NF is synthesized by electrodeposition of porous Ni layers on Ni foam, followed by simple hydrothermal reaction and phosphorization. For HER, the binder-free NiCoP–CoP/Ni/NF electrode can reach 10 mA cm −2 current density at a quite low overpotential of 49 mV, because of the combination of porous Ni layers and highly active NiCoP–CoP nanowires. In addition, the NiCoP/CoP heterostructures exhibited remarkable stability under the long-term durability test. This work provides a new strategy that combines electrodeposition and hydrothermal reaction to synthesize effective HER catalysts.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Dewei Yao,Hongmei Yu,Wei Song,Xueqiang Gao,Xinye Sun,Guang Jiang,Jinkai Hao,Zhigang Shao
To reduce cost and energy consumption of fuel cell vehicles, constructing membrane electrode assemblies (MEAs) with low Pt loading and outstanding performance at low relative humidity (RH) conditions is reported. A catalyst layer based on porous Pt–Ni nanobelt arrays was prepared, in which the strained catalyst enhanced the catalytic activity and the oriented nanobelt array structure provided convenient mass transport channels. The porous Pt–Ni nanobelt arrays were prepared by the magnetron sputtering of Pt and Ni on a sacrificed template and then washed with acid. Consequently, the catalyst layer based on the porous Pt–Ni nanobelt arrays exhibited superior fuel cell performance in H2/air conditions and RH 40%. The performance of the MEA with porous Pt–Ni nanobelt arrays reach 366.6 and 597.6 mW cm–2 with Pt loadings of 36.5 μg cm–2/36.5 μg cm–2 and 108.9 μg cm–2/108.9 μg cm–2 at the cathode/anode, respectively. A conventional CCM with the Pt loading of 100 μg cm–2/200 μg cm–2 at the cathode/anode served as the benchmark, and the cell performance was 230.5 mW cm–2. Apart from that, the Pt nanobelt arrays without a porous structure (100.8 g cmPt–2/100.8 μg cmPt–2) serving as another benchmark achieved a performance of 504.7 mW cm–2. The superior performance of the porous Pt–Ni nanobelt arrays is attributed to the convenient mass transport pathway and the high activity of the porous Pt–Ni nanobelt.
✓ 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）