APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Hongji Peng,Xiaoliang Zhang,Bingrong Wang,Yang Cao,Mingyu wang,Delun Chen,Xiaohong wang,Jinchun Tu
In seawater electrolysis for hydrogen production, the competition between chlorine evolution and oxygen evolution reaction (OER) at the anode limits its hydrogen yield and system stability. To address this, we optimized the anode material by modulating the surface electronic structure of the active sites of Co 3 O 4 using atomic layer deposition (ALD) technology. By introducing the atomic layers of NiO x species, this approach results in the synthesis of a NiO x @Co 3 O 4 /Carbon cloth (CC) heterojunction, which serves as an effective oxygen evolution reaction electrocatalyst for high-performance seawater electrolysis. Adjusting the deposition cycles creates unique material interfaces that facilitate the transformation of reaction intermediate. The NiO x @Co 3 O 4 /CC heterostructure demonstrates superior catalytic performance over single-phase materials, which is attributed to its unique Ni-O-Co interface, showing low overpotentials of 204 mV in alkaline freshwater and 235 mV in seawater solutions at 10 mA cm −2 , 285 mV in alkaline freshwater and 329 mV in seawater solutions at 100 mA cm −2 . In addition, the incorporation of NiO x endowed the material with enhanced overall durability and corrosion resistance, reducing Cl-related species adsorption. After 300 h of chronoamperometric testing, the voltage remained stable, indicating its potential as an ideal electrocatalyst for seawater electrolysis under alkaline conditions.
研究领域:
材料科学
·
电化学工程
·
能源技术
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2020
·
IF 3.31
Shuo Wang,Yu Zhu,Chengyan Wang,Ruixin Ma
Inverted perovskite solar cells with NiO x hole transport layer (HTL) have attracted abundant attention due to low-cost fabrication and high device-efficiency. However, the further development of NiO x -based inverted perovskite solar cells (PSCs) would be restricted by the unsatisfactory electrical properties in pristine NiO x and the non-ideal charge transfer between perovskite and NiO x . In this work, a facile and effective method was designed to regulate the electronic property of NiO x HTL and make an alteration to the interface between the perovskite and NiO x . NH 4 F was used as an interfacial modifier to enhance the charge transfer between the perovskite layer and NiOx. The NiO x -F layer was generated with high transmittance and low trap density . Besides, the power conversion efficiency of the device was improved from 17.17% to 18.94% with the improvement of short-circuit current (J sc ) by using the structure of ITO/NiO x /NH 4 F/MAPbI 3 /PCBM/BCP/Ag. Finally, the device with NH 4 F exhibited better stored stability in the dry condition compared with the control device.
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
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 9
·4237-4242
·
IF 3.5
Man Zhao,Xuemin Yang,Zimei Fu,Wenxiang Wang,Wei Wen,He Xiao,Li Zhang,Junming Zhang,Baoliang Lv,Jianfeng Jia
In this work, low-crystalized and defective NiOx/graphene was synthesized by a facile electrolysis-solvothermal method. In the electrolytic process, Ni ions originate from the Ni anode, and graphene is produced from the graphite cathode. Then, Ni ions are reduced into oxides and deposited on graphene in the subsequent solvothermal process. The NiOx/graphene displays excellent electrocatalytic activity and selectivity for ethanol oxidation reaction to acetate. The peak current density was 296.5 mA cm−2 on a glassy carbon electrode. The FE of acetate was more than 93% at the potential range between 1.4 and 1.7 V. We propose that the mechanism is a cooperation between the chemical deprotonating process of ethanol by Ni3+ species and the electrochemical oxidation of the CH3CH2O* intermediate to acetate at the interface between NiOx and graphene.
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
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Lang Pei,Xusheng Wang,Heng Zhu,He Yu,Sateesh Bandaru,Shicheng Yan,Zhigang Zou
Photothermal catalysis, which combines light promotion and thermal activation, is a promising approach for converting CO2 into fuels. However, the development of photothermal catalysts with effective light-to-heat conversion, strong charge transfer ability, and suitable active sites remains a challenge. Herein, the photothermal effect- and interfacial N–Ni/Ta–O bond-modulated heterostructure composed of oxygen vacancy-rich NiOx and Ta3N5 was rationally fabricated for efficient photothermal catalytic CO2 reduction. Beyond the charge separation capability conferred by the NiOx/Ta3N5 heterojunction, we observed that the N–Ni and Ta–O bonds linking NiOx and Ta3N5 form a spatial charge transfer channel, which enhances the interfacial electron transfer. Additionally, the presence of surface oxygen vacancies in NiOx induced nonradiative relaxation, resulting in a pronounced photothermal effect that locally heated the catalyst and accelerated the reaction kinetically. Leveraging these favorable factors, the NiOx/Ta3N5 hybrids exhibit remarkably elevated activity (≈32.3 μmol·g–1·h–1) in the conversion of CO2 to CH4 with near-unity selectivity, surpassing the performance of bare Ta3N5 by over 14 times. This study unveils the synergistic effect of photothermal and interfacial chemical bonds in the photothermal–photocatalytic heterojunction system, offering a novel approach to enhance the reaction kinetics of various catalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Tonghui Guo,Zhi Fang,Zequn Zhang,Zhiqiang Deng,Rui Zhao,Jing Zhang,Minghui Shang,Xiaohui Liu,Ziyang Hu,Yuejin Zhu,Liyuan Han
Inorganic NiO x based inverted structure perovskite solar cells (PSCs) is reported to be more stable than that with the organic hole transport materials. In this work, NiO x /MAPbI 3 interface chemical reaction induced instability of perovskite is unveiled: Ni 3+ and I − exhibit redox reactions and deprotonation of MA + happens, which result in interface defects and perovskite lattice deformation. Thus the defective interface accelerates the degradation of perovskite by defect pathways from the bottom interface to the perovskite surface contacting H 2 O/O 2 . Self-assembled interlayer of NH 2 − end silane on NiO x separates the reactive NiO x and MAPbI 3 , tunes the interface energy states by –NH 2 end group. As a result, the PSC based on the silane treated NiO x achieves enhanced PCE of 20.1% with decent stability under environmental and extreme conditions (high temperature, high humidity, light infiltration). Our work highlights the interface chemical problem induced PSC instability and a simple interface modification to achieve the stable PSCs.
研究领域:
材料科学
·
能源技术
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yixin Li,Lin Yao,Jinglin Li,Tianqi Yu,Liang Qiu,Muhammad Salman Nasir,Tao Wang,Md Afjalur Rahman,Nirmal Anand,Sharif Md. Sadaf,Baowen Zhou
Dry reforming of methane toward syngas (CH 4 + CO 2 = 2CO + 2H 2 ) presents a proper solution for depleting petroleum and climate change yet remains not industrialized. Herein, NiO x nanoparticles are coupled with GaN nanowires for this target. The as-designed hybrid of NiO x /GaN NWs demonstrates a low onset temperature of 280 o C for dry reforming of methane with a syngas activity of 121.7 mmol·g cat -1 ·h -1 and nearly 100% selectivity. Together with the outstanding stability, a turnover number of 40372 mole syngas per mole Ni species is achieved over 160 cycles without noticeable activity degradation. The correlative kinetic experiments, isotope experiments, in-situ spectroscopic characterizations, as well as density functional theory calculations reveal that the oxidized nickel species with O vacancies and its unique electronic interaction with GaN significantly reduce the apparent activation energy of the reaction, primarily contributing to the superior activity at low temperature. What is more, the evolution track of CH 4 and CO 2 to syngas was comprehensively studied at atomic level, disclosing an obvious anti-coking chemical loop with excellent stability. This work presents a strategy for efficient and stable dry reforming of methane toward syngas under mild conditions.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 12
·6890-6897
·
IF 3.049
Huijun Liu,Qiang Zhao,Kewei Wang,Zhen Lu,Feng Feng,Yong Guo
In this study, polypyrrole nanofiber (PPyNF)/NiOx composites were synthesized by a simple and fast microwave method. The samples were characterized using differential scanning calorimetry and thermal gravimetric analysis (DSC/TGA), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Furthermore, the synthesized PPyNF/NiOx nanocomposites were electrochemically characterized using galvanostatic charge–discharge, cyclic voltammetry and electrochemical impedance spectroscopy (EIS) techniques. They showed the highest specific capacitance of 657 F g−1 at 0.5 A g−1, demonstrating their potential application in supercapacitors.
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
ACS Nano
·
2024
·
IF 15.8
Xing Zhang,Qiaoyan Ma,Yousheng Wang,Jianzha Zheng,Quanxi Liu,Liming Liu,Peng Yang,Wujie He,Ye Cao,Weiyuan Duan,Kaining Ding,Yaohua Mai
Phase heterogeneity of bromine–iodine (Br–I) mixed wide-bandgap (WBG) perovskites has detrimental effects on solar cell performance and stability. Here, we report a heterointerface anchoring strategy to homogenize the Br–I distribution and mitigate the segregation of Br-rich WBG-perovskite phases. We find that methoxy-substituted phenyl ethylammonium (x-MeOPEA+) ligands not only contribute to the crystal growth with vertical orientation but also promote halide homogenization and defect passivation near the buried perovskite/hole transport layer (HTL) interface as well as reduce trap-mediated recombination. Based on improvements in WBG-perovskite homogeneity and heterointerface contacts, NiOx-based opaque WBG-perovskite solar cells (WBG-PSCs) achieved impressive open-circuit voltage (Voc) and fill factor (FF) values of 1.22 V and 83%, respectively. Moreover, semitransparent WBG-PSCs exhibit a PCE of 18.5% (15.4% for the IZO front side) and a high FF of 80.7% (79.4% for the IZO front side) for a designated illumination area (da) of 0.12 cm2. Such a strategy further enables 24.3%-efficient two-terminal perovskite/silicon (double-polished) tandem solar cells (da of 1.159 cm2) with a high Voc of over 1.90 V. The tandem devices also show high operational stability over 1000 h during T90 lifetime measurements.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Shuaibing Guo,Zhaokai He,Siyuan Ma,Zhe Jiang,Jia Dong,Jinbiao Jia
NiO x is one of the most promising inorganic hole transport materials for perovskite solar cells . However, lots of fabrication methods refer to NiO x are limited in n-i-p type perovskite solar cells. Because the deposition procedure of NiO x film such as polar solvents and high temperature process is seriously incompatible with perovskite light-absorption underlayers. In this work, highly crystalline NiO x nanocrystals are prepared using solvothermal method under the presence of long-chain oleylamine molecules. The resulted NiO x nanocrystals can be easily dispersed in weak-polar toluene and form films on perovskite layer without annealing procedure. The n-i-p type device with NiO x hole transport layer achieves an efficiency of 10.34%. Later, Mg 2+ with different molar ratios are incorporated into the NiO x nanocrystals. It is found that introducing a certain amount of Mg 2+ benefits to improve the ratio of Ni 3+ /Ni 2+ , thereby changing the work function and increasing the hole conductivity. As a result, the n-i-p type device with Mg-NiO x hole transport layer yields an improved efficiency of 12.41%.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Hui Zhao,Xin-Pu Fu,Wei-Wei Wang,Jin-Cheng Liu,Chun-Jiang Jia
Despite the supported Au demonstrating superior activity in catalyzing various reactions, their stubborn and widespread deactivation issue has long remained unsolved. Therefore, the challenge in current investigations of Au-based catalysts could be divided into two aspects: uncovering the authentic molecular induction for the deactivated evolution and fabricating interfacial structures combining efficiency and stability. In this work, by incorporating NiO x (H) adjacent to small active Au 1 /Au n species, the as-formed 0.5Au-5NiO x (H)/CeO 2 catalyst simultaneously achieved high reactivity ( r = 5.23 mmol CO ·g Au −1 ·s −1 ) toward the water-gas shift (WGS) reaction and remarkable long-term stability with time-on-stream of 100 h at 250 °C, significantly surpassing the reference Au/CeO 2 counterpart as well as the other oxides-supported Au catalysts reported previously. Comprehensive in-situ characterizations and DFT calculations revealed that the CO molecules, rather than H 2 , H 2 O, or CO 2 molecules, are the dominant molecular driver for Au aggregation, correspondingly inducing the degraded catalytic efficiency. Specifically, on the one hand, the strong CO−Au coordination degraded the ejection barrier of Au atoms from Au-Au coordination; on the other hand, the −OH groups as intermediates from H 2 O dissociation, participating in the stabilization of Au species upon the surface, were dynamically consumed by CO molecules. For these regards, the adjacent Ni adatoms promote the sufficient generation of stable −OH groups for stabilizing Au atoms under WGS reaction. As a result, the corresponding Au−Au ejection and Au−O diffusion barriers of as-formed Au n −O(H)−Ni/CeO 2 combinations are significantly enlarged, which thereby boosts the structural stability in the CO-containing atmospheres.
研究领域:
催化化学
·
材料化学
·
表面科学
·
物理化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Zhihui Ma,Haitao Wang,Hanyu Ma,Sihui Zhan,Qixing Zhou
The electrochemical urea oxidation (UOR) involves the generation of gases bubbles, which often cause the blockage of the electrode surface leading to decline activity. Herein, we report the growth of Ni 5 P 4 nanosheets on nickel foam as bifunctional electrode (CA-Ni 5 P 4 @NiO x /NF) for urea electrolysis. The results indicated that a thin layer of amorphous NiOx formed on the surface of Ni 5 P 4 nanosheets to yield a unique crystalline@amorphous core–shell structure, which can be maintained during long time urea electrolysis. The outstanding UOR performance of CA-Ni 5 P 4 @NiO x /NF was attributed to the unique structure, which not only combine the good conductivity and abundant active sites, but also rendered the CA-Ni 5 P 4 @NiO x /NF superhydrophilic and aerophobic that significantly facilities the release of gases bubbles formed during UOR to avoid the blockage of the active sites. As a result, the CA-Ni 5 P 4 @NiO x /NF electrode exhibited excellent performance for UOR, which only needs 1.45 V (vs. RHE) to deliver a current of 100 mA/cm 2 . When used as anode for direct urea fuel cell (DUFC), it could reach a maximal power density as high as 3.4 mW/cm 2 with an OCV of 0.76 V. The CA-Ni 5 P 4 @NiO x /NF also exhibited excellent activity for hydrogen evolution reaction (HER), with -0.089 V (vs. RHE) to deliver a current of 10 mA/cm 2 . The electrolyzer constructed with CA-Ni 5 P 4 @NiO x as both anode and cathode could run for more than 10 h at a high current load about 100 mA/cm 2 without appreciable potential change, indicating the superb stability of the CA-Ni 5 P 4 @NiO x electrode. Our work provides new insights for understanding as well as the development of advanced electrode for DUFC and urea electrolysis.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Xinfu Chen,Lin Xu,Cong Chen,Yanjie Wu,Wenbo Bi,Zonglong Song,Xinmeng Zhuang,Shuo Yang,Shidong Zhu,Hongwei Song
Hole transport layer plays a critical role in achieving high performance and stable inverted perovskite solar cells (PSCs). Doping has been proved to be an effective strategy to modify the electrical and optical properties of semiconductor oxides. Herein, rare earths (REs: Ce , Nd, Eu , Tb , and Yb) elements are systemically doped into the NiO x hole transport layer (HTL) via a simple solution-based method. The results demonstrate that the REs doping could considerably modify the compactness, conductivity, and band alignment of the NiO x HTL, leading to the highly improved permanence of the inverted PSCs. The PSCs using 3% Eu:NiO x HTL yielded the optimum power conversion efficiency of 15.06%, relatively improved 23.4% compared with the PSC using pristine NiO x HTL (12.20%). It also demonstrated much better long time stability. The improved photovoltaic properties of the device can be attributed to the more efficient charge extraction and suppressed interfacial recombination rate by the introduction of appropriate REs in the NiO x HTL. This work indicates that RE doping is a very effective and promising strategy to achieve adjustable hole extraction material for high and stable inverted PSCs.
研究领域:
材料科学
·
能源科学
✓ 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）